LOL, as a Stinger Gunner in the Corps, this was my first thought too!
I've only had one .22 that ever liked Stingers for accuracy or reliability. Oddly enough, it was a 6" Colt Match Target that would shoot ragged hole groups with them! Everything else I've tried them in, meh...
A match chamber is cut to the minimum size for use in a very accurate rifle or pistol. If you look on www.rimfirecentral.com you will find the industry standard chambers for .22 Lr.
