Shell Shock 5.56 77 loads

[MikeMiller]

Started messing with Shell Shock 5.56 cases wanting to get 2900 fps plus in 18” AR

Anyone got any pet loads?
I tried N540 which has not gotten me to that velocity area without serious pressure signs
Just got some more TAC powder in and that’s next

 

[surprisingrerun]

Ramshot TAC has been the winner so far with No. 41 primers for me. A few friends also report good results with TAC in the NAS3 cases.