i bought a new Rock Island 1911 ...on the .22TCM caliber.
this is a hot fast moving high pressure round. (can do north of 2500 FPS.)
they also give you a 9mm barrel and slide return spring so that you can also shoot 9mm ammo thru it.
now for the rub.....the 22 tcm cartridge is a wildcat round based on the .223 rifle cartridge as the parent
shell case. they cut the case down and re-form the neck to .22 caliber ...the finished cartridges are loaded into a .38 super magazine.
it works fine as a .22TCM because the cartridge overall length is 1.265" and you must use the .38 super magazine....however you also must use the same magazine to shoot 9mm ammo and their overall length is 1.150" that's about .115" shorter... and what happens? stove pipes!
now it seems to me that the better conversion choice might have been .22TCM and .38 super...BUT!
.38 super has a very small rim..... so......the .38 super cartridge case won't butt up on the slide like it's supposed to in order to go into full battery....is it possible i could turn the rims off in a lathe?
so...i was thinking, since the .22TCM is based on the .223 case...why not use a .223 case...cut it down to .38 super length, get a .38 super barrel add a spring ....work up loads for it.
to my thinking having the 2 calibers very close to the same overall length should help eliminate stove piping.
or should i use a 147 grain boolit and seat it out to 1.265" and work up loads for it that way?