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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR-15 6.Something Gasser
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<blockquote data-quote="RT2506" data-source="post: 1433370" data-attributes="member: 10178"><p>CaptnC the barrel that you got is made by Bear Creek Arsenal and they are a crap shoot as to accuracy. Most all of them need to be shot 50 to 100 rounds to get them to start grouping. In my research I have found that people cut down on the number of shots required to get them to start grouping they run a patch with JB bore paste about 50 passes down the bore to hand lap the ruff spots out. My first Grendel was a complete upper from Bear Creek Arsenal and it had a bad barrel, every shot was a flier. I had to send it back to them and they replaced the barrel. It took about 60 rounds to get it to start grouping and so far 1" groups with a certain hand load is about the best accuracy. It absolutely HATES Hornady 123 SST factory ammo. About 3" at 100 is the best with it. I built another Grendel using an Oden Works 18" barrel and it is a tack driver, well under the guaranteed 1 MOA accuracy. But it cost 3 times what your barrel did. If you hand load IMR 8208 with 120 Sierra Pro Hunter, Hornady case, CCI 450 or BR-4 primer, work up toward the max load of 28.5 grs is the most accurate in both my rifles so far. 18" barrel runs 2553 fps 20" 2575 fps. I just started fooling with the Grendel this past February but have decided to use nothing but my ARs to hunt with this coming year if nothing else to PO a liberal. Go to 6.5grendel.com and join the forum. It is full of great information.</p></blockquote><p></p>
[QUOTE="RT2506, post: 1433370, member: 10178"] CaptnC the barrel that you got is made by Bear Creek Arsenal and they are a crap shoot as to accuracy. Most all of them need to be shot 50 to 100 rounds to get them to start grouping. In my research I have found that people cut down on the number of shots required to get them to start grouping they run a patch with JB bore paste about 50 passes down the bore to hand lap the ruff spots out. My first Grendel was a complete upper from Bear Creek Arsenal and it had a bad barrel, every shot was a flier. I had to send it back to them and they replaced the barrel. It took about 60 rounds to get it to start grouping and so far 1" groups with a certain hand load is about the best accuracy. It absolutely HATES Hornady 123 SST factory ammo. About 3" at 100 is the best with it. I built another Grendel using an Oden Works 18" barrel and it is a tack driver, well under the guaranteed 1 MOA accuracy. But it cost 3 times what your barrel did. If you hand load IMR 8208 with 120 Sierra Pro Hunter, Hornady case, CCI 450 or BR-4 primer, work up toward the max load of 28.5 grs is the most accurate in both my rifles so far. 18" barrel runs 2553 fps 20" 2575 fps. I just started fooling with the Grendel this past February but have decided to use nothing but my ARs to hunt with this coming year if nothing else to PO a liberal. Go to 6.5grendel.com and join the forum. It is full of great information. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR-15 6.Something Gasser
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