Got some more range time with my k22s.
I think I found some ammo it actually likes consistently, I ran 50 rounds of the Sellier & Bellot 40grain standard velocity through mine yesterday with only 1 light primer strike, again the same round still fired when I rechambered it. Yesterday was the first time that it actually performed consistently well.
I did find out that my k22s dislikes the remington 22 thunderbolt with a passion, i tried running one mag through, and of it 7 of the thunderbolts wouldn't even chamber properly, it seemed like the round was actually too large for the chamber only the tip of the cartridge would fit but not the rest of the body. I'm not sure if I just got a brick of out of spec thunderbolt, I didn't have another .22 to try it on with me yesterday.