We just finished shooting several Water Buffalo, an Eland and a Zebra with PUNCH bullets. These are copper outside, lead insert solids. We experienced through and through penetration on all animals out to 100 yards regardless of the bullet path through the animal. The bullets can be purchased for reloading or cartridges are available from Grizzly Cartridge.com Our were traveling 2000fps even out of a 20" barrel. I hope this helps.