300 blackout subsonic

[Herd Thinner]

Correct me if I am wrong in my thinking but when developing a subsonic round with 220 G and the bolt does not cycle properly the CUPP was not high enough to make that happen ......curious ....I am trying to find a load since 1680 is not easy to find .....

 

[mscott]

Pistol or carbine gas?
H110 will work for a pistol gas system.

 

[The Lawn Ranger]

v v v v v v v v

 

[The Lawn Ranger]

I use Lil Gun and 208 Amaxes with 10.2" Noveske.

H2 buffer.

 

[USMC-FURY]

H110 will frikkin blow up ur rifle, stick with AA1680 or AA5744 n drop down to IMR/H-4198/RL-7/Norma200 if need be. Try a different spring if its not locking back or get an adjustable gas block to set for sub or super. The JP silent buffer with the white spring can handle both subs n supers.

 

[Herd Thinner]

So it could also have to do with the buffer/spring set up in my Sig lower. If I add a lighter spring for subs will that not beat up the bolt when running supers....or am I backwards....

 

[lawdog]

Check out 300blktalk. They'll set you straight based on your setup.