Apparently the Laney Match Chamber will not accommodate the larger cases of the Stinger 22LR's. It specifically states through out the manual that if you use them it will destroy the chamber. All of the match chambers are built tighter. The smaller dimensions place the bullet exactly the same way every time which makes accuracy better. But they also have less room for error. If a bullet is over sized or is the gun gets dirty the chamber is too tight and the bullet won't chamber correctly. There is a list of suggested rounds for the gun in the manual. I am going to find out if I can use the CCI "velocitor" rounds with it. If I can't that might be a deal breaker for me. personally.