I can't help you with the feed problem. The Springfield model 187N was my only .22 for many years($39.95 in 1971) the only problem I had was firing pins. I had broken firing pins replaced three times over the years(probably 80,000 rounds total)
With those little respected Remington Thunderbolts, I could shoot the primers out of shotshell hulls at 25 yards. It also liked Winchester .22 LONGS.(find those today)
Numrich probably has the spring.
