
Left to right: .308, .260 Remington, 6.5 Creedmoor, 6.5x47 Lapua
It's been a good year for 6.5 mm. The .260 Remington has hit full stride after a ramp-up of several
years, with top competitors at most field-style long-range matches shooting it. Lapua's 6.5x47 saw
the first wave of custom LR rifles built around it in 2007 and proved to be just as good as people
hoped. Finally, Hornady is announcing its new 6.5 Creedmoor cartridge at SHOT 2008. How do these
three mid-size 6.5 mm cartridges stack up against one another? I spent much of 2007 figuring out
the answer to that question.
Why 6.5 mm ?
Shooters who compete in
"practical"
rifle matches have been migrating to 6.5 mm calibers for several years. While "tactical"
shooters can be a dogmatic bunch, often sticking to conventional choices like .308 and .300
Winchester Magnum, practical competitors are in it to win, and the advantages of the lightweight but
high-BC 6.5 mm bullets didn't escape their notice. The long-range practical matches I've shot and
administered in the last five years have common themes of physical exertion, shooting from weird
positions under time stress, and difficult UKD targets.

To match the BC of the 6.5 mm 139-gr Lapua Scenar (#2 from left, 0.615), the .30 has to step up the 210-gr Berger VLD (#3 from left, 0.631). Also shown: .30 175-grain SMK (left, 0.496) and the .338 250-grain Lapua Scenar (right, 0.675).
This new class of medium-sized 6.5 mm cartridges will fit properly in short actions (308 size) and
feed from the detachable box magazine (DBM) systems becoming ubiquitous on tactical bolt rifles.
They have less recoil than 308 but provide better trajectory performance for both wind and drop than
the standard 190gr SMK load in .300 Winchester Magnum, and have barrel life over 4000 rounds, or
about twice what you can expect from Tubb's 6XC, 6.5-284 Norma, or 7mm Remington Magnum.
Launching the high-BC 130-142-grain bullets at a moderate velocity is a good recipe for a good
long-range performance without the costs of the barrel-burners. Once you're using the same high-BC
bullet, adding 150 fps to get 2970 fps instead of a more sedate 2820 fps only gains about four
inches of wind drift per 10 mph cross!
But 6.5 mm is not just a range toy. The 6.5x55 mm Swede has a long history in hunting in Europe,
and it sufficient to take moose if shots are chosen carefully. These new 6.5's can duplicate the
classic 6.5x55 loads, so with the right bullet selection, they can get the job done on game.
This article isn't intended to sell 6.5 mm or to give a thorough account of each of the three
calibers. I aim to explain how the three cartridges were tested and the summary of the results I
was able to achieve with each one. I recommend reading the full articles for more background.
.260 Remington
The .260 Remington is the commercial version of the 6.5mm wildcat based on the .308 Winchester case,
productized in 1997 by Remington. Brass can easily by formed by simply necking up .243 or necking
down 7mm-08 or .308 brass; however, care must be taken with regard to the resulting neck thickness.
The Gun
In spring 2007, I had George Gardner of
GA Precision chamber a 26-inch medium-Palma contour 6.5 mm
barrel from
Rock Creek in .260 Remington and fit it to an Accuracy International AW (AI-AW) rifle.
The length and contour duplicate the profile of the AI factory 26-inch 308 barrel. The rifle was
topped with a S&B 3-12x50mm PMII scope. On the muzzle, I used a 1.5x9" titanium sound suppressor
(designed for .308) most of the time, backing up to the AI single-chamber muzzle brake when I
couldn't use the "can" for whatever reason.

The author's AI-AW was re-chambered in .260 Remington by G.A. Precision by adding a 26-inch medium Palma barrel from Rock Creek Barrels.
Bottom-line: Load, Ballistics, Accuracy
Final load:
139gr Lapua Scenar @ 2820 fps, 40.7gr H4350, CCI BR2, Lapua .243 brass necked up.
From a 100-yard zero, this load needs 7.4 mils of elevation to 1000 yards, and will
drift 53 inches with a 10 mph cross. Accuracy is excellent at 1/4 MOA.
260 139 @ 2820
Zero 100yd 5000' Density Altitude
RANGE ELEV- moa mil | WIND(10) moa mil RANGE
100 0" 0.00 0.0mil | 0" 0.50 0.1mil 100
200 3" 1.25 0.4mil | 2" 0.75 0.2mil 200
300 11" 3.50 1.0mil | 4" 1.25 0.4mil 300
400 25" 6.00 1.7mil | 7" 1.75 0.5mil 400
500 45" 8.50 2.5mil | 12" 2.25 0.7mil 500
600 72" 11.50 3.3mil | 17" 2.75 0.8mil 600
700 107" 14.50 4.2mil | 24" 3.25 1.0mil 700
800 151" 18.00 5.2mil | 32" 3.75 1.1mil 800
900 204" 21.50 6.3mil | 42" 4.50 1.3mil 900
1000 267" 25.50 7.4mil | 53" 5.00 1.5mil 1000

Three steps of forming .260 brass from .243 (left to right): fresh .243 brass; necked up with 6.5 mm mandrel; neck turned to remove extra material at base of neck with K&M tool; neck sized one final time and loaded.
Load Development Notes
I originally tried using the Remington .260 brass. The primers pockets started off a little loose,
and the brass was very soft. With standard loads, I had a problem with gas seeping around the
primer and leaving a "soot" ring where the primer met the brass. This was present even with loads
that exhibited "zero" case-head expansion.
I also learned that the pressure limiter in the system would be piercing primers. The AI-AW is set
up to be utterly reliable in harsh field conditions and ignite mil-spec 308 primers. In guns built
from the ground up for a very high pressure cartridge, it's common to bush the firing pin hole and
then control the pin protrusion. I wanted to leave this rifle at the military spec, not to mention
that a replacement bolt head from AI in the UK would be very expensive, so I left it and lived with
the results.
I shot and won the 2006 Blue Steel Ranch
Steel Safari match using loads in R-P brass, but had to toss half my brass after the match
due to gas seepage. Transitioning to the Lapua brass, I used a K&M 6.5 mm mandrel and neck-turning
tool from PrecisionReloading.com to make .260 Remington brass from the Lapua .243 Winchester
brass. The results are excellent, uniform, and hard cases that last even with hot loads.
The downside of using formed 243 brass is that brass prep time in increased. Part of the 243's
shoulder turns into the neck, and this part of the brass is thicker than the normal 260 neck
thickness. As a result, I had to neck turn each piece of formed brass to remove this "donut"
created in the expanding process.
Even in a great barrel on a solid rifle, I found .260 Remington to be somewhat temperamental with
regard to accuracy vs. load recipe. However, once I locked on the recipe of H4350 with the BR2

Up until recently, there was no factory long-range ammunition for the .260 and reloading the only way to go. Black Hills Ammunition will have loads using the 139-grain Lapua Scenar available in 2007.
primer, everything came together and I've replicated the same results with bullets other than the
139-grain Lapua. The other powder to try in .260 is H4831SC-- compressed loads using H4831SC are
likely to have a slight velocity edge on H4350.
Ammo and Components
Remington dropped the ball on .260. All they had to do to essentially own this 6.5 mm market was
to produce some good, accurate factory ammo with an appropriate bullet for long-range use. Instead,
they have a few hunting offerings and that's it. GA Precision convinced Black Hills to do a run
of long-range match ammunition in 2007, using the 139-gr Scenar and producing ballistics very close
to my final hand-load solution. Priced on par with other factory match ammo at about $1/pc, it's
much more expensive than reloads but makes .260 a viable choice for the non-reloading long-range
shooter.
Good yet affordable brass has been a problem for .260. Remington's brass seems to be of variable
quality. The 1000 pieces I got were junk; however, other .260 shooters have reported acceptable
results using it. Although it is some work, forming .260 from any cartridge in the .308 family is a
viable path. I used Lapua's .243 brass. I know others have used 243, 7-08, and 308 from Lapua,
Winchester, and other sources of halfway-decent brass. Nosler debuted its "NoslerCustom" .260
Remington brass in 2007. It is of excellent quality, but very expensive at almost $1/pc.
Pros
In this comparison of 6.5x47, 6.5 Creedmoor, and .260, the .260 Remington is the "base-line." As
such, I'll limit the Pros and Cons to those aspects relevant to the other two cartridges only.
- Load recipes are well sorted out
- Brass easily formed from the 308 family
- Most case capacity of the three cartridges
- Exactly the same body diameter, taper, and OAL as .308
Cons
- Brass either very expensive or marginal quality
- Very limited supply of long-range factory match loads
Match Performance
The .260 has been popular with top shooters at practical or field-style long-range rifle matches for
the last several years. In the last two years, more than ten local Colorado shooters have built
.260 Remington rifles to effectively replace their .308's and Magnums. My .260 was finished just a
few weeks before the
2006 Blue Steel Ranch Steel Safari, where I won both the overall and the
"standard/unlimited" rifle class shooting at small steel targets spread out in the terrain from
about 50 to 1000 yards. I returned shooting the same rifle in
2007, again winning
"standard/unlimited." The 260 gives a palpable advantage over .308.
Summary
The .260 Remington is a solid performer for long-range matches, with good barrel life and 300WM-like
ballistics. The .260 is the status quo that 6.5x47 and 6.5 Creedmoor have to go up against and
prove their worth.
6.5x47 Lapua
In cooperation with Grunig & Elmiger, Lapua set out to develop a cartridge optimized for European
300-meter CISM competition. Similar to our NRA High-Power, 300-meter CISM has a set course of fire
from defined shooting positions using highly specialized target rifles. The caliber that currently
dominates 300-meter CISM is the 6 mm BR Norma due to its excellent accuracy, good ballistics, and
low recoil. As the project officially started in 2005, two initial project goals were to improve
ballistics by decreasing wind drift and to reduce barrel wear compared to the 6 mm BR Norma, which
will get only about 2500 rounds at top accuracy before the barrel starts to show wear.
The 6.5x47 Lapua case is about three-tenths of an inch shorter than a .260 Remington case, and has a
sharper shoulder and a longer neck. With an overall loaded length of 2.700 to 2.800 inches, most
bullets can be seated with their rear bearing surface above the case shoulder. It can be thought of
as a shortened and "improved" .260 Remington case, with a small primer pocket. Factory 6.5x47 Lapua
loads shoot the 139-grain Lapua Scenar at 2690 fps, the 123-grain Scenar at 2790 fps, or the
108-grain Scenar at 2950 fps.
The Gun
I was approached by the editor of
6mmBR.com in early 2007 about the opportunity to build a "Tactical
Rifle" - a rifle intended for the field-style practical rifle matches - in 6.5x47 Lapua, in order to
really get a feeling of how the cartridge stacked up against the conventional .308 and the
now-becoming-standard .260 Remington. So I unscrewed the factory .308 barrel from my
other
Accuracy International AW (AI-AW), and screwed on a barrel that George Gardner had cut from a Satern
blank. This barrel finished at 25.3 inches and we added six flutes to cut down on weight since the
barrel came with a heavy profile. I like my guns set up the same for continuity, so this rifle was
topped with another S&B 3-12x50mm PMII. Again, the suppressor was used for most shooting. At this
point, I had two identical AI-AW rifles- one set up in .260, one set up in 6.5x47 Lapua.

GA Precision fit this 25.3-inch Satern barrel to the author's Accuracy International AWP for testing
Lapua's new 6.5x47 cartridge. The rifle is shown here with a S&B 5-25x56mm scope, and the thermal
suppressor cover retracted for cooling during a break in load development.
Bottom-line: Load, Ballistics, Accuracy
Final load:
123gr Lapua Scenar @ 2930 fps, 37.2gr RL15, CCI BR4, Lapua brass.
From a 100-yard zero, this load needs 7.2 mils of elevation to 1000 yards, and will
drift 59 inches with a 10 mph cross. Accuracy is excellent at 1/4 MOA or better.
123 6.5x47 Lapua @ 2930
Zero 100yd 5000' Density Altitude
RANGE ELEV- moa mil | WIND(10) moa mil RANGE
100 0" 0.00 0.0mil | 0" 0.50 0.1mil 100
200 2" 1.25 0.3mil | 2" 1.00 0.3mil 200
300 10" 3.25 0.9mil | 4" 1.50 0.4mil 300
400 23" 5.50 1.6mil | 8" 2.00 0.6mil 400
500 42" 8.00 2.3mil | 13" 2.50 0.7mil 500
600 68" 10.75 3.2mil | 19" 3.00 0.9mil 600
700 102" 14.00 4.0mil | 27" 3.75 1.1mil 700
800 145" 17.25 5.0mil | 36" 4.25 1.2mil 800
900 197" 21.00 6.1mil | 47" 5.00 1.4mil 900
1000 260" 24.75 7.2mil | 59" 5.75 1.6mil 1000
Load Development Notes
Using Lapua brass, bullets from Lapua and Berger, and a variety of powder and primers, I tested no
less than 45 combinations looking for the "best" overall performer. Besides excellent accuracy and
consistency, I also wanted optimum ballistic performance for long-range UKD courses of fire with
100% reliability-- there are no sighters or alibis in practical competition. It was almost
immediately clear that the pressure limiter in 6.5x47 in the AI-AW rifle would be the primer
piercing issue I originally saw with the .260. Ignoring the primer issue, even with nuclear loads
substantially exceeding my final load, there were never any pressure signs on the case head, nor was
the bolt hard to lift.

Quarter-MOA or better groups seemed to be the norm, not the exception, while doing load development
with the 123 and 139-gr Lapua Scenar and Berger 130 gr.
Using powders such as RL15, H4350, Varget, and N550, accuracy was very consistent with the 123-grain
and 139-grain Lapua Scenars, along with the 130-grain Berger VLD. Of the 45 combinations tried
during the sandbagged 100-yard bench-rest testing, less than 10% were noted for "poor accuracy". To
put things in perspective, "poor accuracy" meant worse than 0.5 moa. Most loads shot between 0.25
and 0.5 moa, and the best loads shot just better than 0.2 moa. I should add a disclaimer at this
point that I am not a particular good bench-rest shooter. In the end, I settled on the 123-grain
Lapua Scenar shot at 2930 fps using 37.4-grains RL15 with a CCI BR4 small rifle bench-rest primer,
with a loaded over-all length of 2.735-inches.
Without the primer issue, the following ballistics would have been
possible based on the experimental results: a 139-grain Lapua Scenar at 2850 fps; a 123-grain Lapua
Scenar at 3080 fps; and a 130-grain Berger VLD at 2950 fps. RL15 is the powder for 6.5x47
Lapua. Similar results were had using H4350 and N550, but the RL15 seemed more predictable and was
more consistent. With regard to primer selection, CCI 450, BR2, and #41 all gave similar results.
Ammo and Components
Because this cartridge was designed from the ground up for European long-range competition (in this
case only 300 meter), Lapua has factory loads for the 108, 123, and 139-grain Scenar. Factory
6.5x47 Lapua loads shoot the 139-grain Lapua Scenar at 2690 fps, the 123-grain Scenar at 2790 fps,
or the 108-grain Scenar at 2950 fps. Testing of factory Lapua ammunition showed that the published
velocities are a little conservative. The 123-grain loads shot at 2820 fps from my 25.3-inch barrel
and consistently held half-MOA or better groups.
As for components, the Lapua brass is excellent quality as usual, and costs about $0.65/pc if
purchased in bulk. I did zero - zero - brass prep during load testing and accuracy and consistency
was excellent. The Lapua brass is very strong.
Pros

Shooting the 123-grain Lapua Scenars from his Accuracy International AW re-chambered to 6.5x47 Lapua,
the author only had one rifle miss at the Camp Guernsey Invitational Multi-Gun.
- Ultra-strong case design
- Reasonably-priced excellent-quality brass
- Proper long-range loads available as factory ammunition
- Possibility of exceeding .260 loads due to strong brass
Cons
- Smaller case than .260 limited powder volume
- To achieve same ballistics as 260, needs to run at high pressure
- Factory ammunition 100-150 fps slower than same bullets in .260 Remington
Match Performance
I shot the 6.5x47 AI-AW at the August 2007
Sporting Rifle Match. After the main match, John S. (also
shooting 6.5x47) and I were tied for second place. John edged me out with a better wind call in the
sudden-death shootout on the known-distance range, so I ended up third overall. I try to console
myself that his higher-BC 130-grain JLK bullets with a 40 fps edge over my 123-grain Scenars at 2930
fps had something to do with it. The overall match winner was using a straight .260 Remington and
just beat us by three points at the end of the match. In the field, the performance of the .260
Remington is almost indistinguishable from the 6.5x47 Lapua.
The second big match I shot the 6.5x47 rifle at was the
2007 Camp Guernsey Invitational Multi-Gun
Match, put on by
Colorado Multi-Gun at the National Guard base near Guernsey, Wyoming. This was a
match for long-range rifle, carbine, and pistol, with carbine targets to 330 yards and rifle targets
to 700 yards. Thirty-eight shooters competed through seven "run and gun" stages, including one night
stage, over two days in the terrain of the base. An accurate rifle, rock-solid data, and the
light-recoiling 6.5x47 helped me dominate one of the two long-range stages, giving me the match
points for an overall win.
Summary
In the field, .260 and 6.5x47's performance is virtually indistinguishable. The lighter 123-grain bullet I
settled on for the 6.5x47 has only about five inches more drift (per 10 mph cross) at 1000 yards
than my 139-grain .260 load, but is one-fifth of a mil flatter at the same distance. Viscerally, the
heavier .260 bullet produces more impact signature when impacting long-range steel targets-- but a
hit's a hit. Ultimately, I lost some ballistic performance with the 6.5x47 vs. the .260 due to the
pressure limitations in my rifle.
 |
Read the full article 6.5 Creedmoor - .260 Done Right? in Shotgun News, 31 March 2008 |
6.5 Creedmoor
The 6.5 Creedmoor was developed for the express purpose to provide a cartridge with the accuracy and
ballistics to be competitive at the top level of High-Power Long-Range competition using factory
ammunition, while also being easy on the novice reloader. During the 2006 High-Power Championships
at Camp Perry, Hornady's Chief Ballistician Dave Emary was chatting with Service Rifle and National
High Power Champion Dennis DeMille. Dave asked Dennis what his ideal competitive round would look
like. His answer was that it would shoot high-BC bullets with great accuracy for winning long-range
performance; it would have low recoil and have comparatively long barrel life; factory long-range

6.5 Creedmoor was designed by Hornady as a turnkey solution for winning NRA HP Long-Range events in
"Match Rifle" class, which is dominated by the Tubb 2000 rifle.
match loads would be available and no more expensive than .308 Winchester; and it would be very
"reloader-friendly." The components used in the factory ammunition would all be available to the
reloader in plentiful supply, and the factory loads would use readily-available commercial
components.
The recipe to exactly duplicate the factory loads would be printed on every box of
ammunition from Hornady. The powder used in the factory loads is H4350 and the primer is the
Federal 210M Match.
Emary and the Hornady engineers went to work and by early 2007 had come up with a cartridge roughly
based on the .308 body size, shooting a 6.5 mm bullet. The case has a 30-degree shoulder and a
0.370-inch neck. The case head is identical to .308 Winchester which makes it a shoe-in to any .308
action, and the body is tapered 0.004-inch per side for extraction reliability. While reloaders
will indubitably try to hotrod the cartridge, factory ammunition is limited to 58,000 psi and shoots
the 140-gr A-MAX (BC 0.585) at 2810 fps from a 26-inch barrel. Compared to some long-range
ammunition which runs at a maximum pressure over 60,000 psi, being able to achieve a respectable
2800 fps with the high-BC 6.5 mm bullets will increase safety, aid reliability, and provide long
brass life. For reduced recoil or short-course matches, the factory 120-gr A-MAX (BC 0.465) loads
run at 2980 fps.
The Gun
At this point the consistent experimental method suffers a blow. Up until now, all testing was
done on the same rifle platform: the AI-AW. For the 6.5 Creedmoor, I was only able to get a barrel
for its native competition rifle, the Tubb 2000, from McMillan. I borrowed a Tubb rifle from
fellow practical shooter Tom Freeman for the test. Since I'm not an aperture or metallic sight
shooter, US Optics provided a 3.8-22x44 mm SN-3 with a mil-scale reticle and EREK 0.1-mil elevation
knob for the project. The barrel finished at 28 inches and was not threaded for a muzzle device.

The test rifle was a Tubb 2000 I borrowed from fellow shooter Tom Freeman. With the 28-inch 6.5
Creedmoor barrel screwed on, I added an US Optics SN-3 3.8-22x44 mm scope. This setup could work
for "Any/Any" division or F-Class (if a bipod were added).
Bottom-line: Load, Ballistics, Accuracy
140-gr Factory Load:
140gr A-Max @ 2770 fps, 41.7gr H4350, 210M, Hornady Brass.
120-gr Factory Load:
120gr A-Max @ 2980 fps, 43.5gr H4350, 210M, Hornady Brass.
From a 100-yard zero, the 140-gr load needs 7.7 mils of elevation to 1000 yards, and will
drift 59 inches with a 10 mph cross. Accuracy was 1/2 MOA or a little better.
6.5 Creedmoor, 140 AMAX @ 2810
Zero 100yd 5000' Density Altitude
RANGE ELEV- moa mil | WIND(10) moa mil RANGE
100 0" 0.00 0.0mil | 0" 0.50 0.1mil 100
200 3" 1.25 0.4mil | 2" 1.00 0.3mil 200
300 11" 3.50 1.0mil | 4" 1.25 0.4mil 300
400 25" 6.00 1.8mil | 8" 1.75 0.5mil 400
500 46" 8.75 2.5mil | 13" 2.50 0.7mil 500
600 74" 11.75 3.4mil | 18" 3.00 0.8mil 600
700 110" 15.00 4.3mil | 26" 3.50 1.0mil 700
800 155" 18.50 5.4mil | 35" 4.25 1.2mil 800
900 210" 22.25 6.5mil | 45" 4.75 1.4mil 900
1000 276" 26.25 7.7mil | 57" 5.50 1.6mil 1000

I found it difficult to bench the Tubb rifle as solidly as my AIs, so the best I could shoot
was in the 0.3 MOA range. I think the cartridge is capable of better but I wasn't able to coax
better performance out of the prototype ammunition.
Load Development Notes
Due to limited time and a limited amount of pre-production 6.5 Creedmoor brass from Hornady, my load
testing wasn't comprehensive. I think long-range shooters will be pleased with the results with the
120 and 140-grain A-MAX bullets; however, I couldn't resist trying some other 6.5 mm bullets in the
Creedmoor case. Sticking with Federal 210M primers and H4350, I loaded and shot the 139-grain Lapua
Scenar and the 130-grain Berger VLD. Both bullets shot excellent groups like the factory
ammunition. The Scenars shot at just about the same velocity as the 140-grain A-MAX when loaded
with the same charge. The 130-gr Berger VLD split the velocity of the two factory loads at about
2900 fps. For the reloader willing to push pressure a little bit, I think this cartridge has some
headroom.
Ammo and Components
Hornady intends the 6.5 Creedmoor to be an off-the-shelf solution for long-range shooters, and
offers several long-range factory loads for that purpose. The 140-gr load is specced at 2810 fps
and the 120-gr load is specced at 2980 fps from a 26-inch barrel. The reloading recipe for each
load is printed on every box of factory ammunition, so replicating or improving on the factory loads
won't be a mystery.
Although no production brass was available at the time of this review, the pre-production brass was
good quality. Judging based on the quality of Hornady's other brass, I expect the production brass
to be good quality and affordable, at probable under $0.60/pc.

Long-range shooter RayDog Sanchez described shooting 6.5 Creedmoor from the Tubb rifle as "boringly
accurate" at 1000 yards.
Pros
- Almost identical case capacity to .260 Remington
- Long-range factory loads to be available from Hornady
- Quality yet affordable brass to be available
- Load recipe printed on factory ammo boxes
- Better case design than .260
Cons
- Still new. Component availability to be proven.
- Is different than .260 but doesn't offer substantially more performance
Match Performance
I haven't yet had an opportunity to run the 6.5 Creedmoor in practical/field matches. Based on its
accuracy and ballistic performance, I expect it to provide exactly the same results as .260
Remington. Dennis DeMille shot the 6.5 Creedmoor during the 2007 NRA High-Power Long-Range season
and had great success. It is reported that as soon as he switched to the 6.5, his rapid fire groups
and scores went through the roof, and he set a new personal best at the 600 yard line with 200/15X.
Summary
Hornady has the right mind-set to make its new cartridge a success in the competitive and practical
market, unlike Remington who basically let the .260 languish in a few hunting rifles.
Summary - Who Wins?
The .260, 6.5x47, and 6.5 Creedmoor have almost indistinguishable ballistic performance. Factory
ammunition for the 6.5x47 Lapua is down 100-150 fps versus the .260 and 6.5 Creedmoor, but an
experienced reloader with a strong action can match or exceed their performance with hand
loads due to the strong case design. I wasn't able to test the 6.5 Creedmoor in an AI-AW like the
.260 and 6.5x47. My best guess is that it would match or slightly exceed .260 Remington, but the
variance would be within what we see barrel to barrel.
Anyone with a rifle in any one of these three calibers would be silly to ditch a working system to
switch to another of them-- they are that similar. Make your choice based on component
availability and price.
What will I do? Because of the primer issue in the AI-AW rifles, I get better ballistics from .260
than 6.5x47. I'm going to keep shooting the original Rock Creek / GA Precision .260 barrel until
it's toast, and then look at which of .260 or 6.5 Creedmoor has better brass for a cheaper price for
the next 6.5 mm barrel.

The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't
make hits -- shooters do.