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Posted: 12/15/2013 4:23:41 PM EDT
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Does anyone have an AR chambered in 260 Rem. I am looking at building one. With a standard contour 20" fluted barrel, is it possible to build an 8 lb gun?
I've only been able to find a handful of companies producing AR barrels chambered in 260. Namely, Black Hole Weaponry and Krieger. Of course the Krieger barrel will be a shooter, but what about the BHW? Does anyone have a 260 barrel (or 308 for that matter) from BHW and if so, how does it shoot? I've had a 6.5 grendel on order for a year with no word of when it will ship. The availability of parts and scarceness of brass for the grendel is turning me off of the caliber. It seems 6.5 bullets and 260 brass are pretty easy to come by. |
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I have both a Grendel and a .260 Rem. The 16" Grendel is an 8.6lb gun with optics, mount, magazine. The .260 Rem? No way, unless you get a carbon fiber wrapped barrel. My .260 Rem upper weighs more than my Grendel with everything above, plus a bipod.
Midway currently shows Grendel brass available, and that was my first search. If you want a .260 Rem AR10, Armalite makes a decent production gun with a smaller firing pin hole on the bolt. I wish I had an Armalite BCG, but I used DPMS for my last 2 .260 AR's. The first was a factory DPMS LR-260. My current one was built by GA Precision, using a Bartlein barrel and it shoots extremely well out to 1000yds with the 130gr Berger VLD. You can also get drop-in barrels from Lilja, and I highly recommend them, along with Krieger. http://www.riflebarrels.com/products/ar_10.htm You might want the chamber cut for the types of bullets you plan to shoot. I had my chamber cut for the Lapua 139gr Scenar, but it shoots the VLD's and 142gr SMK extremely well, like 5 rounds into .4-.6" regularly. 
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Quoted:
Your smoking crack if you think you can build an 8lb rifle based on a 308 platform. The whole purpose of the .260 is to make a long range shooter with superior long range performance over a 308. When I said 8 lbs, I was talking about rifle only, no mags, ammo, optics, or mount included. Harrison at AR performance makes a lightweight contour 16 or 18" 308 barrel that when used with a carbon fiber handguard will allow you to build a 7 lb rifle. |
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LRRPF52 looks like your 260 has a bull barrel. I would like to keep the weight to around 8 lbs or so for the rifle only, not including mount, optics, mag, or ammo. I want a gun light enough to carry while hunting.
Looks like Lilja makes a 20" med contour fluted barrel in 260. I'll call them and see what the specs are on the barrel. That barrel, a carbon fiber handguard, and skeleton stock might make an 8lb rifle feasible. |
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I started using Winchester 7mm-08 brass, which neck down easily. I now also use Lapua .260 Rem brass, which lasts a long time, and is the gold standard for brass.
Yes, I have always used a bull barrel because my .260 Remington's were specifically set-up for shooting long-range with as flat a trajectory and excellent wind-bucking as possible. For a lightweight carry gun, I have the 6.5 Grendel 16" carbine, with two more 16" and 18" in the works. Like I said, if you really are set on a lightweight .260 Remington AR10, get the Proof Research carbon-fiber wrapped barrel if you have deep pockets. The next option is to do what you're doing with the Lilja fluted, or you can use their AR10 740 profile. You really need to decide on what kind of on-target performance you need, because I think a lot of people often get way too much gun for what they will in reality be using it for. I have thought about a lightweight .260 Rem myself, but the little Grendel still makes that hard for me to justify. At the end of the day, I would recommend sitting down and listing a set of specifications that you are looking for. Example....I need: _____MOA accuracy potential at _____yds average for ___rd groups No more than 1 Mil of full value 10mph wind drift at _____yds _____ft-lbs of energy at _______yds _____Mils of drop at _____yds with a _____yd zero Once you work that out, then you can look at realistic rifle weights, chamberings, the main bullets you are looking at. Here's how that went for my 22" heavy .260 Remington: I wanted a self-loader that would smoke .308 at 300-800yds for wind drift and trajectory, then give me 1200yd + effective range for hitting IPSC or E-type silhouettes in practical military sniper competitions. I knew that I needed better than 3/4 MOA accuracy to be competitive against the teams that I see. To me, that means my rifle will consistently shoot 5rd groups into less than 3/4" at 100yds, less than 4" at 500yds, less than 6.25" at 700yds, etc. I need less than 1 Mil of drift as long as I can get it in a full-value 10mph wind, and I need to be supersonic (over 1116fps) at sea level past 1200yds. I wanted less than 9 mils of trajectory at 1000yds with a 100yd zero. I didn't want a 24" barrel, since I needed the gun to be somewhat maneuverable and more easy to carry on the timed Land Navigation courses, where the top teams basically sprint the entire time. My .260 Rem is on the heavy side, but nothing like my DPMS LR-260 or LR-308, which are beasts. I get 2810fps with the 130gr VLD or Norma from my 22" barrel, with 1/2 MOA accuracy, which gives me: Range Velocity Energy Trajectory TOF Drift |
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Mine is Bartlein, done by GA Precision. It is actually easy shooting at 1000yds with the rifle, even off a truck bed.
I shot a 9.25" group off the bipod while laying in our truck at 1000yds, with a wind shift during the group that I purposely didn't hold for, using the Berger 130gr VLD. |
| I’m 99% done with a .308 build. I went with a JP 18” lightweight contour barrel and the low mass carrier. Overall I was fairly conscious to select light weight components but I did go with a 15” handguard and Bennie Cooley compensator. It weighs just under 8 ¼ lbs without optics. I don’t think you’ll get to less than 8lb with a 20” medium contour barrel unless it’s a carbon fiber wrapped job. Barrel, stock & muzzle treatment are where you’re going to save weight. |
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Quoted:
Mine is Bartlein, done by GA Precision. It is actually easy shooting at 1000yds with the rifle, even off a truck bed. I shot a 9.25" group off the bipod while laying in our truck at 1000yds, with a wind shift during the group that I purposely didn't hold for, using the Berger 130gr VLD. Did you just send them your upper or did they do the entire rifle? Also what twist rate did you go with? The more and more I look at my data, I need a longer barrel and if I am going to spend the funds I want to do it right once and be done. |
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