Due to the scarcity of .22 LR ammunition, the New Mexico Department of Game and Fish has made pellet guns legal for hunting Grouse. If I run into a bear or mountain lion, should I take a head shot, heart shot or try to break it;s shoulder? I'll be carrying an old Daisy pump capable of sending a .177 pellet about 800 FPS down range. Should I carry my son's CO2 pellet handgun for backup?