Your KE might be 71 feet and your arrow might be blazing away at 304 in the first 5 yards after leaving your string but the KE is going to drop as you get further and further down range aproaching that 50 yard targert. Not saying it's not enough or it is enough to punch trough and elk or moose because I have no idea. I think this is what people are saying when they say to use heavier arrows for more momenturm since weight plays a greater factor in that equation than in KEbut that is a discussion of Momentum vs KE and we all know that argumant will last 34 pages.

Personally, where I hunt Deer there would be almost no reason to have to shoot beyond 20 yards and that would be from one side of a clearing to another.