i have a beretta extrema 2 and when I shot the jellyhead I tried alot of different shells to see what patterned best and the Federal Vital Shock 3 1/2 #5's patterned the best for me. Thats another thing I would recomend, Try alot of different shells. I realize the hevi shot's etc. can be expensive, but the federal, winchester, etc. standard lead shots are fairly inexpensive.