Any of you guys ever use one of these things??..stick a 22 mag rimfire into one of these & you can shoot it in 223 or 22-250 depending on the one u buy...It is 25 dollars sent here from alaska...I'm thinking I'd like to try some reduced loads in my new 22-250 barrel..Really cant decide if I should load some reduced loads or go with one of these cartridge adaptors...This new 22 250 barrel seems pretty tight..I'm not sure but I think the 22mag is smaller in diameter than .224...mike in ct