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Email Western Powders and ask which powder for SBRs. The ballistician email's is [email]johan@ramshot.com[email]. edited: Johan is no longer at Western powders. Scott@ramshot.com Scott Ziebarth will get back to you.
I've used X-terminator with pretty good results in 11.5" barrels and 55gr fmj.
You may also look at AR-comp. it has a high burn rate percentage in a 12" barrel.
Last edited by koz; 01-10-2014 at 17:15.
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