I'm using a .50 Armsport for Elk in Western WA this year. I bought some 348 grain copper jacketed hollow points. With a bit more fiddling I think I'll be able to get acceptable groups out to 100 yards (100 grains of powder). My only concern is will this open up too much in the animal? I'm concerned that it won't penetrate enough. The copper jacket looks very modest. Since it's already a .50 caliber projectile my preference would be for no expansion and hopefully a through-and-through. Seems like the safest bet with an animal this big. What are your thoughts?