milsurpcollector1970
09-30-2013, 10:16 PM
I got my 300 blackout AR-15 finished and went shooting Saturday. It shoots great with the jacketed but only shoots patterns with cast.
Here are the specs
300 blackout 16" stainless barrel pistol gas system 1-10 twist
boolit Lyman 314299 sized to .310 with gaschecks
powder WC820(surplus) 12.7 grains
average fps 1540
So I could raise the speed? (no pressure signs yet)
Try a new powder?
size boolit up or down?
Try a new mold? I bought a lee C312-155 2R but the nose is too big and jams in the barrel.
Anyone else got anything?
Here are the specs
300 blackout 16" stainless barrel pistol gas system 1-10 twist
boolit Lyman 314299 sized to .310 with gaschecks
powder WC820(surplus) 12.7 grains
average fps 1540
So I could raise the speed? (no pressure signs yet)
Try a new powder?
size boolit up or down?
Try a new mold? I bought a lee C312-155 2R but the nose is too big and jams in the barrel.
Anyone else got anything?