I shoot CCI Mini Mags,CCI Stingers,CCI Quickshocks,and Federal HP's in the bulk pack.I have also shot some Remington Thunderbolts but those are mainly for target practice and pests control.I really dont use any one round for a specific animal if I see a critter that I dont think needs to be around I shoot it with whatever I have with me at the time.The ones that have worked the best for me are the CCI Quickshocks but Im also going to try and find some Velocitors for heavier bodied animals like porcupines.