260,

While new to drillings, I'll pass on a few things I've learned to far. I've recently purchased, and began shooting a pre-war J.P. Sauer 12X12/9.3X74R.

First off, your choice of chamberings is, to me, the ultimate drilling combo for large game. I can't wait to hunt with mine!

A few things to look at very closely:
1.) The rate of twist of the rifle barrel. VERY important, if you intend to shoot 286gr bullets...it must be 1-14" or so. Mine is about 1-21", and 286's tumble. Fortunately, it works fine with 232gr Norma Oryxs', which will make a good hunting bullet. Mine may have originally been a 9.3X72R and re-chambered?

2.) See if the gun is marked with the load that the gun was either proofed and/or regulated with.

3.) Measure the shot barrel chamber length, and bore constriction. You'll find most vintage guns have 2-1/2" to 2-9/16" chambers. If you want 2-3/4", you'll have to really shop around.

4.) If you'll be buying a Germanic gun, I'd suggest going to the German Gun Collector's web site, and get the book on German Proof Marks.

Good luck!!! This drilling of mine has me hooked!!!!

Jeff