I have purchased only one Triple-K holster, and I tossed it. It was a piece of garbege that fit fine when not being worn on a belt, but became too tight to withdraw the gun at all once put on a belt. Another friend bought a Triple-K shoulder holster, and had similar problems.
A holster won't function properly if it is made for a similar-sized gun. It has to be made for the make and model you have. The only exceptions are open-muzzle holsters holding a different model from the same manufacturer, that is identical in all respects other than barrel length and grip size.
In a pocket holster, you really want Ron Graham, R. J. Hedley, or K&D.