The molding/template used by TacStar is too tight for quick release and use of the shells (i.e. quick reload). I've left shells in it in the hopes of "stretching it out" but it still doesn't work.
Save up your money and get a Mesa Tactical instead.
Pros: cheap, will hold 4 shells very well
Cons: doesn't release shells quickly
This review was written in the old system and had content requirements that are different than reviews written today.