I am building a 300BLK pistol with the following:

Barrel length: 8.5"
Twist rate: 1:7

I would like to mount the AAC 762SD using the flash hider mount.

I have read that shooting 300BLK subsonic (approx 200 grain or greater) increases the risk of a baffle strike if the bullet is too long resulting in not enough 'twist' so when the bullet exists the barrel it still has some wobble.

What say AAC or the hive on running subsonic in this set-up. Will I get enough twist on a 1:7 from a 8.5" barrel for bullets traveling less than 1050fps?

Thanks in advance

220's work fine in factory loaded ammo.

Thanks AAC.

Now if you can just get my suppressor out of  NFA “jail” quicker....

I shoot 250s in my Ruger American with 1-7.

What’s the barrel length of your Ruger?

My concern is a 8.5” barrel with a 1:7 twist stabilizing enough where I don’t risk a baffle strike.

I shoot factory Remington 220 gr from my PSA 8.5” upper with no baffle strikes so far.

I have shot 240Gr out of my 8.5" 1/7 twist barrel. Zero issues.

Thanks.

I ran S&B 200 grain subsonics this past weekend and they performed flawlessly.

Man this suppressor is quiet.