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Reloading Berger Bullets


Reloading for the AR10

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Unread 07-26-2010, 11:51 PM
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Join Date: Jul 2009
Posts: 245
Reloading for the AR10

Does anybody reload for the AR10 in 308? I'm going to just use standard data for 150grn BTSPs and RL15. Has anybody backed off their loads because the AR10 is a semi-auto action?

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Unread 07-27-2010, 12:19 AM
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Join Date: May 2008
Location: Texas
Posts: 151
Re: Reloading for the AR10

I load for a DPMS 308 and use standard load data. If the gas system on a AR is configured correctly then there is no reason standard data can't be use. This is where an adjustable gas system comes in. It is not something that is a must but is sure is nice when getting thing tuned correctly (especially when suppressing a gas .
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Unread 07-27-2010, 08:36 AM
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Join Date: Jul 2009
Posts: 245
Re: Reloading for the AR10

Thanks, I'll give it a try.
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Unread 07-27-2010, 09:33 AM
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Join Date: Mar 2006
Posts: 899
Re: Reloading for the AR10

I called Sierra and the ballistic tech said back off
1.5 gr. From max
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Unread 07-27-2010, 11:13 AM
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Join Date: Feb 2009
Location: Sedalia, MO
Posts: 1,256
Re: Reloading for the AR10


Same data should apply, just make sure you're using powders suitable for the gas operation of the action; basically mid-range burning speeds such as 4895, Varget, and yes, RL-15. You should heed the advice to back down if you're using military 7.62mm brass, as it is a bit thicker than the commercial stuff. It's also good to use in autoloaders, since it's made with gas operation in mind.

If you haven't loaded for autos before, they're different and need to be treated as such. Small base dies, possibly, but full length resizing ALWAYS. Use chamber gages on the completed ammo, and use them or a bump gage to set your dies for resizing. Not the same thing as loading for a bolt gun, but not really difficult, either.

Kevin Thomas
Lapua USA
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Unread 07-29-2010, 11:42 PM
Join Date: Jul 2007
Location: Idaho
Posts: 366
Re: Reloading for the AR10

Have loaded for auto-loaders learned that the small base do a good job and
usually get about 4 or 5 reloads on your brass, military spec holds up the best.
Powders from H332 to H414 will work, varget and reloader 15 seen to be the
standard but h4895, blc2, W748,h335, tac, 4064, Imr 8208 all do very well.
Imr 8208 tested recently showed great results..
Varget at 44.5 win brass cci 200 showed good results in a couple of semi-autos.
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Unread 07-30-2010, 11:44 AM
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Join Date: Jan 2007
Location: Black River Falls, WI
Posts: 227
Re: Reloading for the AR10

Loading for your AR10 isn't much different than any other gun. I have 3 AR15's and 1 LR308 (DPMS' version of the AR10). I use the standard load data. I do the same with my gas guns as I do with my bolt guns, start low. I will usually back off a couple grains at least and then work my way up. Pressure signs will be about the same, so nothing new there.

As for small base dies, I think that all depends on the gun. What I found with my .308 is that I need to keep my brass somewhat clean. If it has some sizing lube or grime, it may give me problems with continued shooting.
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