I am in agreement with all the comments about practicing and knowing your gun and loads for long shots. The 270 can easily kill a deer at 500 yards with a good shot, but to ethically make a long one-shot kill, you should make sure your rifle can consistently shoot one inch groups or less at 100 yards. I shot a remington 270 for years and the longest Coues shot was at 450 yards with a 130 gr handload that caught the deer in the center of the chest. That was taken from a great rest and before range finders (yes, I am old - I ranged it on a later hunt). If you can hold a 3 inch group at 200 yards, that equates to shooting roughly a 7 1/2 inch group (or worse) at 500 yards. Coues deer are very small from the backbone to the breast when standing broadside (approx. 14 inches). My advice is to do things to improve your groups to under an inch at 100 yards if you can. Maybe glass bedding the action, having a little trigger work done, free floating the barrel, adding a bipod, etc. Then practice, practice, practice. You must remember that the rifle range is the best rest you will ever have to fire your gun. In the Coues world, most places are steep up and down and you rarely have a good solid rest. This, plus adrenaline and being out of breathe causes a lot of misses at long range. I would hold your range to under 300 yards until you tighten the groups a bit. Remember, you want to make a good kill shot, not just hit the deer in the lower leg and have a wounded animal to chase. Hope this helps.