Would a .22 be feasible or something slightly bigger but not 303 or 7.62 which are the only other calibres I know of? Remember it's for a fantasy novel in an alternative history. I don't need it to be absolutely accurate to the nth degree from an actual historical or contemporary viewpoint. For plot...

I'VE JUST FOUND THE ANSWER I NEEDED TO THIS ONE ON ANOTHER FORUM. MANY THANKS TO ALL WHO TOOK THE TROUBLE TO REPLY! Hello and thanks to anyone who can answer this. It seems impossible to get a sensible answer from google. For the sake of a novel I'm working on, I need to know if it is at all feasibl...