Woody--You've gotta be careful around a herd of buffalo with one of these rifles, too. Of the five buffalo I have killed and the other seven or eight I have seen shot, the ONLY bullets I have seen recovered were a 450 grain cast bullet out of a 45-90 and a 405 factory Remington load out of a Marlin 45-70 lever gun. I have never failed to shoot through and through a buffalo with either a 45-70 or a 45-110 using a 500 to 515 grain bullet. Be careful around a herd, or you will wind up killing two with one shot. Seriously.