Ive been reading the posts here and on 450 bushmaster.com.

I have an impact slug of my throat (sizes .453) Barrel is mcgowen blank 1-18 twist

I have a mold on the way from Accurate 45-280B that will drop at .453 (hopefully)

I just got some taller gas checks made for the 450B.

I have some surplus wc820, H110 and LiL Gun.

Just so I dont reinvent the wheel has anyone else gotten the 450B to shot better with cast in the AR.

Any advice?