The information on this page is taken with permission from Craig Boddington’s excellent book “Shots at Big Game: How to shoot a rifle accurately under hunting conditions” published by Safari Press, Inc. Illustrations by Stuart Funk. Click on images to see a larger version.
Shot placement on a broadside deer is simple, but deer don’t often cooperate by standing just right. You’re more likely to get a quartering shot of some kind. On animals quartering away, try to locate the off-side front leg, and follow its line up to the chest area to find your aiming point. You need to visualize where the vitals lie from any angle, and plan your shot accordingly. On strongly quartering-away shots, your bullet may actually enter the deer’s body quite far back. On deer quartering toward you, keep your eyes on the on-shoulder; that one protects the chest area that your bullet must reach.
The problem with wind isn’t really that it has an effect — it’s in reading it and figuring just how much effect it will have. Winds at a 45-degree angle cause half the drift of a 90-degree crosswind, while headwinds and tailwinds have no effect at all. But is the wind at the target the same as where you are? How can you tell? You can read the wind carefully, but it comes down to a best guess.
It doesn’t matter whether the angle is uphill or downhill – the effect is the same. Your trajectory will essentially follow the trajectory curve of a bullet fired at the horizontal distance to your target.
Successful shooting of running game with a rifle isn’t materially different from hitting flying game with a shotgun. It’s essential that you keep the rifle barrel moving, establish your lead, swing with the target, and make certain that you fire with the barrel moving, following through afterward by continuing your swing.