Well I have only hunted elk twice, and one of those I didn't even have the tag, so clearly I am an expert. I haven't seen an animal yet that I wouldn't shoot with a good .264 - .338 bullet in an accurate rifle. If I drew a trophy bull tag in a once in a lifetime unit, I'd reach for a 7 mag. Otherwise, I'd be carrying a M7 or Montana in 308 topped with a light 3-9x40.