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AR question

 
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  #1  
Old 01-01-2012, 02:44 PM
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Join Date: Nov 2010
Location: Colorado
Posts: 98
AR question

Not sure this is the right place to ask this question or not... but here goes. My son has a Bushmaster AR it has a 24 inch barrel with a 1/9 twist with a free floated barrel. I am having trouble getting heaver bullets to group well. Using the 69 grain Sierra Matchkings it is shooting almost a 5 inch group at 100 yards, this is using Varget. It shoots about the same group using the 55 grain Noslers, and again with Varget. It will shoot a much tighter group using Benchmark and the 55ers. I still think that it should shoot much better. Under an inch at a 100 easily.

I have the same rifle except my rifle has a 1/8 twist and a 20 inch barrel. My rifle shoots 1/4 inch at a 100 using just about any load with Varget and it doesnt shoot the Benchmark very well.

My question is: Is Varget too slow burning for that longer barrel? And any suggestions on a faster burning powder to improve on the group size?
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  #2  
Old 01-03-2012, 12:22 PM
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Join Date: Apr 2011
Location: Northern Utah
Posts: 6
Re: AR question

I have had great luck with Winchester 748 in all my .223 loads.
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  #3  
Old 01-03-2012, 02:35 PM
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Join Date: Mar 2008
Posts: 533
Re: AR question

I have a bushmaster varminter 24 in barrel with a 1/9 twist and I shoot the 69 smk with tac powder. My gun really likes this combination.
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Old 01-03-2012, 03:35 PM
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Join Date: Jan 2008
Location: Northeast
Posts: 2,420
Re: AR question

Sounds like something is not right, 5" is way too big a group. I have a 1:9 twist Bushnell with a 20 inch HB. It shoots just about everything into an inch or so including my handload of 25 gr of Varget with a 69gr SMK. I also this load in my 24" Varmint AR, DPMS. It shoots .25" at 100. I don't think barrel length should make a difference using Varget.
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