Tks John303

If I was putting a new barrel on it, I might go for a faster twist .430", like 20" to 24" at the most, for use with the current run of handgun and .430 to .431" rifle bullets, cast and/or jacketed to 330gr.

The case could be a .444 case or even .43 Mauser brass (93gr. capacity). Of course, one would have to make up his own dies.

Ballistics would have to be kept fairly low, but even this early bolt action should allow speeds up to around 1,850fps with 330gr. bullets in the Mauser's original case. No flies on that. A fun gun for pigs or stags. The 265gr. Hornady SP meant for the .444 Marlin is a really good heavy ungulate bullet- smashes moose when driven to around 2,000fps. That speed should be easily accomplished at under 28,000psi in the larger case of the .43 Mauser. HA! It would truly be a .43 Mauser if chambered up in a .430" or .431" groove diameter barrel.

On the safty side of things, a factory .43 Mauser load would not, should not chamber.