I'm looking to pick up a lever action for some antlerless hunts out here in Colorado. I'll use it to hunt antelope, deer, and elk. I'll be sticking with open sights on this gun which will likely keep my effective range around 100-150 yards. At that distance with a 160 grain bullet will I have sufficient KE for elk? I'm sure a 45-70 would be a better option for elk but then I've got a lot of gun for the deer and antelope and it won't be near as fun to shoot as the 30-30. Is there a fairly common caliber somewhere in the middle I should consider for a lever gun?