I wonder if there is a significant pressure problem with shooting a 2.75" 1oz. rifled slug (non-sabot) in my circa 1914 Sauer 12ga X.43 Mauser Cape Gun. The shotgun barrel has a 2.5" chamber and is marked 'nitro proof' and the Federal slug I have been wanting to try is marked 'max load' (don't think I've seen a slug shell that wasn't). The choke measures IM with a drop-in choke device. Barrels are steel. Greener crossbolt.
The gun probably was not meant for modern slug loads, but is in pretty good condition and is built to withstand the rifle cartridge. Am I gonna blow something up if I try this out? The rifle barrell shoots the old CIL 385gr factory loads pretty well to point of aim with the 100yd leaf site, and I'd like to see how the slug matches up.
Thought I would seek advice here before I did something unusually stupid...Geo
