This could mean the centre of balance of your rifle is too far to the rear, depending how you hold and shoot it and in what posture, in certain circumstances. Or perhaps your grip or trigger technique could be modified. You sometimes see F.T. shooters have added weight to the front of their rifles. I've added weight to the rear of my EV2, to redress the balance. Just a few thoughts, not saying you're necessarily at fault, or your mate. Regards .... Geek