Go the the range, shoot a bunch. There is a big difference between hitting where you want at 300 yards vs 600 yards. And then try it without being on a shooting bench, that will really tell you if you want to take a shot or not. I passed up shooting at an elk last fall at 750 yards. To much wind and couldn't get comfortable enough to make the shot. Plus it was later in the day and across a steep ravine. The next day I was back and still passed at 700. I'd rather not shoot than cripple one.