Insight on switching to a 6.5” barrel

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Silent But Deadly
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Re: Insight on switching to a 6.5” barrel

Post by dellet » Sun Jun 23, 2019 11:16 am

STINKEY wrote:
Sun Jun 23, 2019 12:58 am
I have a 7.5" AR Pistol. Cycles just fine sub-sonic but will not cycle properly without the can..... the back pressure is what is needed.
Have used everything from 225 ELD to 175 Match. Got MOA at 100 yds with 180 match grade bullets but couldn't consolidate a point of aim for both 100 and 50 yds. This is with a 3 MOA red dot set way far down the rail. Going to need more work. Spent a lot of time and money in working up the Load/Bullet weight combination. NOT even going into shooting sub in a 16" platform ...........
Just hope someone has a bit more insight to help me out on this one...................


A good place to start would be a new thread dealing specifically with what you have going on. You should be having all the trouble you are alluding to.
300 Blackout, not just for sub-sonics.

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