I would recommend practicing with the same ammo as you are going to use hunting. If you are going to practice with MR loads, use them for hunting with full knowledge of their limits and your limits. You should know your firearm and ammo well. A padded shooting pad for the shoulder can help a lot. Limit your range time session length so your shoulder does not get sore. You mentioned before that you have a 10/22. Use this for a lot of practicing. A .22LR can be used for practice well over 100 yards.