My 10/22 is a late 70s/ early 80s vintage, 100% factory, and I've shot thousands of Stingers through it without issue. Mine never fed the truncated cone bullets like Yellowjackets very well, so when I shot gophers more often, I usually used Stingers. I also shot quite a few of the old Winchester Xpediter ammo, which was similar to CCI Stingers, but with a 29 gr bullet if I recall correctly. They didn't shoot very well for me though.