I have an older High Standard SportKing, semi-auto. I never had a problem with it until I tried using Winchester brand .22 "target and small game 36gr Long rifle ammo. Using that ammo I would get a minimum of 10% failure (i.e. 1 in 10) to eject, causing a jam.
Using CCI standard velocity 40 grain target load I had no failures to eject.
Looking at the rim, under magnification, of each brand there is a slight difference, the CCI rim is slightly thicker which probably allow the extractors better grip.
anyone else every had any similar problems with different brands of ammo?
best
atr