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the 22TCM9R was made to allow RIA to make conversion kits to convert 9MM handguns to use the 22 TCM family of rounds The original 22TCM was the length of a .38 Super (The 22TCM 9mm 1911 use a 38 super magazine). RIA shortened the bullet nose to make it fit in 9mm magazine "The TCM 9R round does not replace the existing TCM factory ammo, but enhances the company’s offering to consumers. Ammo matches the length of a 9mm round allowing it to feed and function properly as well as function with Armscor’s new TCM / 9mm pistol conversion kits. Given the average velocity of a 9mm round, consumers can expect to almost double their bullet velocity when exchanged with Armscor’s new round. Also functions in TCM chambered 1911s from Rock Island Armory"

This is the "slightly shorter bullet" 22TCM9R Dallas.

checked by upc and it is the 22TCM9R version (shortened bullet) It can still be used in standard 22TCM guns but the standard 22TCM ammo can not be used in 22TCM9R guns (ammo to long for magazine)