Are they semi-wad cutters? That will do it if they are. I find best performance with a FMJ ball round. Wad cutters and hollow points sometimes get hung up like you describe.the bullets were winchesters, what exact type I don't know, but they were 185 grains, and were very flat.
Absolutely.besides hoppe's oil and 3in1 oil for lubricant?
I don't know exactly how old it is, but I bought it used for $400. It definitly was shot a lot before I got it, so later today I'll get a new recoil spring. I never got an owners manual, so I've got two questions, how long is a P220 recoil spring good for, and should I use something besides hoppe's oil and 3in1 oil for lubricant?