So this is how I did it with him... I had him practice shooting with the Remington low recoil rounds. The recoil was nothing for him even when he was 10-11 and small. Then for his first elk hunt when he was 12 I took the gun and sighted it in myself with the 140gr accubond federal ammo. I didn't want him to think about recoil. The gun was ready and I just handed it to him. When the time came and a bull was out there, of course, there is adrenalin and the extra recoil in that moment was not a factor. We did the same thing for 2 years and he took those bulls at 12 and 13 years old and never had to think about recoil. Now, he's able to shoot my 7mm because he's much bigger, but I thought that approach allowed him to learn to shoot and never get any recoil/flinch thoughts in his mind. That's what I liked about that gun so much. Being able to practice with low recoil, then switch to a bullet with more than enough punch to put down bulls in one shot.