The gun store guys talk on the subject:
I’m always careful at the range when shooting similarly sized cartridges. I’ve heard too many stories of people using the wrong cartridge, some by accident and some by mistake, with undesirable results.
Barry’s story about the .44 Magnum / .45 Colt WalMart mixup was pretty funny.
From a design standpoint the fact you can hurt yourself by using the wrong round is pretty poor. I don’t want to go on a big “Darwin” rant, because if you’re not paying perfect attention, and you don’t know all that much about firearms it would be incredible easy to have happen.
Anyone ever have a bad day because of an ammo mixup?