I packed an old Winchester model 92 in 25/20 quite a bit when I was a kid. I dont remember the bullet weight or what brand of ammunition I used back then but I did kill big game with it including one bull moose and two mulie bucks. My sister shot a big grizzly with the same rifle, ( it had her dog) saved the dog but didnt kill the bear. My dad ended up killing that same bear a few years later and found the bullet from the 25/20. My sister still has it. Funny to think that we didnt even consider that we might be underpinned in those days.