Dad always told me to "make your shot count." There are too many variables with targets past 400 yards that come into play, and I would really grieve if I shot off the hind leg of a deer at beyond that distance, because I did not make my shot count. I would limit targets at over 400 yards to, varmints, feral pigs, paper, tree stumps, big white rocks, and gongs. If you make a bad shot on any of those, it is not a big deal. If you are out shooting with a buddy or two, and see a big white rock at seven hundred yards, see who can hit it first, and have a good time. Whomever hits it first, pat him on the back for being a great shot. If you miss, no harm, no foul. I myself would not "experiment" on game animals for long range target practice. Hearing a gong "clang" at eight hundred yards gives you a satisfying feeling; watching a deer crawl off with a shot off leg, I would think, does not. MM