Thread: AR15 .300 Whisper / Blackout help

Hey guys,

Have got an AR15 that im trying to reload subsonic 240gr pills for with no luck cycling. Basically ive tried a bunch of powders , (4895 bm2 ,vv110) among others) but some will cycle but dont have enough speed (4-500 fps) and the powder is very compressed (f%ckn jammed) in. tried different seating lengths etc
The powder that everyone seems to be using is vitavouri 110, and which ive brought a shitload of, which fills up the case perfect (9.5 grains) and gives good velocity (1050fps) but it wont fully cycle the action.it kicks halfway. This seems to be the powder that i need to get it cycling.

So whats the answer? do i need to buy another gas block? can i tune my current one to cycle this powder? or do i need to stick to factory loaded 220 grainers?
rifle is a 12" barrel that dan hardy made with supressor etc. can upload a pic if that helps

This is my first ar so my knowledge is limited (read - zero) haha.


cheers guys