Came across this video on Youtube, from 450Martini's channel, shooting a nice old 1870's era Mk III Snyder Enfield.  These are really nice as they have a latch on the breech block.  The older ones without the latch had a disturbing tendency now and then to blow open when firing.  That will wake you up! These guns are thumpers with a slug as big as you thumb and served the British Army well during their short reign.