.410 id

What is this calibre ?

I have a very similar round,but mine was simply made by cutting off a 63 mm or a 50 mm paper case to 33 mm.I don’t know if your sample is an auxiliary cartridge,however I am pretty sure that mine is an homemade shotshell with a reduced shot quantity

It looks like its a blank. Has it got any shot in it?

It is possible to use a 410 shotgun shell some of the +40 caliber hand guns, but to fit in the chamber the shot shell was shortened recrimped so it would fit in the cylinder. Vic