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 300 blk for an unsuppressed SBR? 
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Location: Tri -Cities
Joined: Thu May 23, 2013
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Real Name: David
velillen wrote:
Anthony.L wrote:
8-9" is good to go. The powder is also really important especially with semi-auto. Wrong powder and you won't achieve subsonic and properly cycle the action. AA1680 is one of the best but can be hard to find.


I havent seen AA1680 locally but its pretty available online. Powdervalleyinc has it in stock. AA5744 is a decent alternative but thats a stick powder but it pretty much same burn rate and performance as 1680 (in my experience)

I saw it at Tulalip Cabelas right before I left, ~ 3 weeks ago, but pretty good stock. Seems like the more rare powders might be more regularly in stock there. Could be wrong of course.


Wed Jun 08, 2016 6:50 pm
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