Re: ready for a new build
ive been using a 30x378 for about 25 years for long range hunting in pa.
mine is a heavy gun with a custom action, barrel block, and a 36" barrel.
with a 200 gr. sierra matchking, my velocity is about 3500 f.p.s.
i dont think that velocity could be obtained with a barrel less than about 32". the factory weatherby with its 26" barrel dosent come close.
when i had my gun built, the gunsmith wouldnt use any action but a custom, or a weatherby, and that only after lapping the lugs.
i know nothing about your action. from what i hear they are a good action, but you are talking about big cartridges here.
i wouldnt be making a decision based on the brass you own.
the bolt face isnt a problem, a filler can be installed to make it standard mag.
i also have another 30 cal. built on a modified 378 case. its an 18 lb. gun with a 30" barrel and a weatherby action.
we use that gun 90% of the time. its about the same as a 300 ultra mag.
if i were you, id look seriously at one of those cartridges. either the 7mm, or the 300, would make excellant pa. long range outfits.
kevin cram is a sponser here. lives in danville, not far from you. a long range shooter, hunter, and gunsmith. i believe he has a 338x378. it would be worth a call.