You have to keep your scope power low like 2-4X. You also have to have your gun set up so when you pull up your gun it's right where you looking. If not you might need to have your stock fitted or adjust your scope. I've had real good luck with my Remington 760. A nice wide angle scope will also help. Practice picking out something in the woods and see how quick you can find it in your scope. You can even do this at the range. Lower your gun and bring it up as fast as you can, pick out the target and fire. If you get good at this at 100yrds you should be able to hit a deer no problem. The other problem is how fast they are running. I had to lead a deer by about 3ft one time. It was running flat out broadside to me at 100 yrds. The first shot I put right on the shoulder and it hit the dirt behind the deer. By the third shot I had it dialed in and dropped it. If they are closer and only at a good trot, put it right on the shoulder, maybe slightly forward. Always be ready for a second shot and watch the deer's reaction. If you are focused you can see where your bullet hits and make an adjustment with your follow up shot. Some gunning clubs have a running deer shoot a few times a year. If you get a chance, go it's almost like the real thing. Some guys think this is unethical, but I don't really care.