Remington has always had the worst rimfire ammo you can find. It's single biggest problem from a user stand point is the lube on the bullet. Remington operated under the belief that if some is good, more is better, so too much must be just right. The lube on your bullets has hardened with age and is causing your problem. I've seriously fired at least half a million .22lr rounds in my life (old and long time competitor). I used seven-eight cases a year for many years. During that time I NEVER found any Rem rimfire ammo that was reliable or fed well in any gun I owned. It always had too much lube on it. In the colder weather (mid-fifties and down) it simply was horrible. Under the best conditions it's "iffy". If you want to use them up, warm them up in a warm room and scrub the living daylights out of the handgun chamber and they'll probably work for a while until the chamber gets a good coating of old lube and then you'll have to scrub again. IMO, I'd get rid of them and get something like CCI SV for quality/price or go all out and get some Eley, RWS, Norma that has a low viscosity lube and enjoy your range time with quality ammo that feeds and functions. Norma is often on sale at a reasonable price and shoots really well in all my rimfire firearms.