Hello, this is my first time posting, nice to have found this site! I have a question to tease the brain, I have a 1908 DWM mauser ( I know old, antiquated, and out of date and not as good as rem 700, Wby Mk V etc.) that has a bad barrel (rusted) in .308 Norma Mag. I would like to build the most powerful gun I can out of a MZ 98 for about 1000 yards, I know they chamber the .30-378 on these actions and they hold, but would like to stay at or above .375 cal. Gun will be single fed from the rear after bolt removal and custom chambered (no cartridge length limits) do not worry about "springy" action as I have that cured, also weight NOT an issue, the heavier the better. Thinking a .378Wby or A-square with SMK bullets and a 34" 2.25" dia. straight or straight taper barrel. I will be making a custom all aluminum stock. I have a full machine shop and several decades with auto-cad and metallurgy experience but would like to keep cost reasonable. I have no use for the gun really, and want to use the Mauser to see what can be done with it, so. unless you have an action for one of the BIG boomers (.408,.416barret or .50BMG) for less than $400. I would like to use the '98 as it has already had a lot of nice work done to it (Lapped, polished, Match adj. Trigger etc.) with very few rounds through it. Thanks!