That is why I go on the hill to the range just about every day and shoot 6-8 shots at the 1000 yd target , then on down the ridge looking for groundhogs. Different wind, different light, different temperature, practice about every day and pretty soon you will pass on the 90% chance and will be confident of a 100% chance of a kill shot!
I voted +1000 because I have access to a very good shooting 338 Lapua, but would not hesitate to drop the hammer with my 308 to 850. If my new powder, bullet combo works out, then deer better stay 950yds and out or they are in the freezer!
That is why I go on the hill to the range just about every day and shoot 6-8 shots at the 1000 yd target , then on down the ridge looking for groundhogs. Different wind, different light, different temperature, practice about every day and pretty soon you will pass on the 90% chance and will be confident of a 100% chance of a kill shot!