When I practice with my 300 rum, I use a folded towel for a cushen. I'll fire 3 or 4 shots until I think that I may be flinching. Then I put the 300 down and shoot my 22 (with a scope). The 22 rebuilds the smoothness in my shot. After 20 or 30 rounds out of the 22, I'll try the 300 again. Remember, the slightest flinch (even a blink) throws off your shot. Dry firing is also another well accepted technique for practicing with a rifle. Just check your chamber before practicing. Also practice pulling the trigger as slowly as possible. You should feel the internal metal parts sliding against each other. Any skill requires practice! Good luck!