Hello lancster,

Thanks for the reply. I really appreciate your knowledge, and help.

I didn't want to imply that there was such a cartridge as a 600 bpe ... just so happens a 600 case fit. .... sorry ..

I have now shown a picture that the shows that a modern 3" 20ga shell fits perfectly into this rifle's chamber. The Magtech 20ga brass case also fits perfectly. I'm wondering if it would be safe to shoot modern 20ga slugs in this gun, or should I work up a load using the 20ga Magtech brass.

https://www.buckstix.com/buckpics/24GA-20GA-DR.jpg