450_EXPRESS
(.333 member)
25/01/09 03:21 PM
Re: wall thickness of doublerifle chambers
Measurements taken approx. 1/8" in front of rim cut. (.040 rim)
450 Express (BP) 3 1/4" Thickness .218", T.C. Martin, underlever, hammers
450 Nitro Express 3 1/4" Thickness .295", T. Bland, boxlock, toplever
(70gr Cordite, 480 ball)