Those WWII ctgs. may be pretty valuable in themselves. I'd look around for a broken box of Fiocchi if you just want to make it go bang a few times and save the originals. (I did shoot up a bunch of Australian-made .455s in a 1918-vintage MKVI and a Colt New Service back in the 1960s when these guns were pretty close to free and ammo was cheap. A local gunshop in Berkeley, CA (!!!) had a case of ex-Irish Army--not IRA--MKVIs and the the owner told me he'd give me my pick of them if I'd clean 'em all. So I did).
I had no problems with the Ozzie ammo except that they were so slow that I could see them in flight!
I'll look at my manual "Cartridge Conversions" to see if my memory is right and you can make .455 cases by thinning the rims of .45 Colt (NOT ACP!) and shortening them.
Last edited by Mike A.; 08/30/17 11:02 AM.
