I wanted to try out some .22LR CCI stinger rounds in my rifle today (savage mk II-G), so i bought a couple 100 pks at walmart. I had a problem in that the casing seemed a little too fat to go all the way in smoothly. I'd fire, pull the bolt back, and the round would be stuck in the chamber, and i'd have to push it out w/ my cleaning rod.

IS the casing a little thicker on the Stinger rounds?