My brother has a habit of jamming 20 gauge shells in 12 gauge barrels etc., I have recently purchased a 300 RUM and my brother has jammed a shell into it and I'm I can't tell which shell he jammed. So will a 300 RUM shell fit in a 300 WSM and vice versa, I have 300 WSM shells, 270WBY Mag, 7mm mag shells, but I'm pretty sure it is a 300 WSM shell.
Any help?
Any help?