Partridge Cartridge 7mm Mauser 7x57 subsonic cartridge adapter kit

Thje original Partridge Cartridge, developed and handmade by a couple of hunters in Alberta. Kit includes a machined steel 7x57 cartridge that unscrews to take a .22 nailgun blank; stick one of the included .284 lead balls in the mouth of the cartridge and you now have a single, reloadable subsonic round for shooting grouse while hunting deer, bear, moose or elk. This one won't chamber in my 1896 Boer mauser carbine, so I'm passing it on. located in Saint John NB; shipping available at cost, likely under $20.