Hey thanks everyone for the input, this is useful stuff!
Ammo I used was Federal .22 LR Champion Value Pack
Thanks for the advice on looking at the ammo to see if hit by firing pin...found several bullets with the indent in them I saved from the range.
Zero failures to feed or eject.
I haven't tried other ammo yet, I will. I'll also follow the advice on the guide rails post cleaning!
Picture of ammo that was hit, but didn't fire: