I have nothing against expanding bullets -- in smaller calibers. Smaller calibers need to make up for their size (inadequacy? LOL!) somehow, but when you are starting out at a half an inch, well, that's just a different story. I have used XTPs in different calibers with success, but on an animal that big, and bison get really big, I want the absolute maximum penetration -- and two holes.

I was so impressed with my buddy's .500 Linebaugh that day, that years later I am finally having one built! They just work.......