Pellet Accuracy
Try every pellet type you can find (pellets are cheap). You will be suprised at the difference in accuracy and group sizes. If you really want a suprise weigh them. for consistancy. I noticed with my model 48/52 in 177cal that it was very fussy in the pellets it shot. I wasnt overly impressed with the accuracy at first, so I bought every type of pellet I could find and shot 10 round groups at 20 yards to start. While the pointy hunting pellets would penetrate a 2x4 the accuracy was terrible in my rifle. Thru experimentation with match pellets, hunting pellets, target wad cutters, and round nose I found suprisingly my best accuracy was with crossman copperhead wadcutters, or round nose pellets. Once I found pellets my rifle liked I was able to start shooting longer distances with much more accuracy.
Just my thoughts
Wyle1