I inherited my dad‘s old Model 1912 after he passed away. This is an old 1914 vintage gun I grew up shooting however, after actually learning a thing or two, it’s seldom ever shot anymore. The reason is the ammo availability. It wasn’t until I believe 1937 that 2 3/4” became the standard length for the 12 gauge. Many guns that predate this, including my 1912, had 2 1/2” chambers. No idea how it survived all those years shooting 2 3/4” shells but once I found out about that, it’s been retired to a life of family heirloom. Sure, I got a flat of factory new production 2 1/2” shells I found on ammoseek.com just to say I got shells for it but I generally shoot my more modern guns these days.