I think the problem is you can't predict the velocity of a ricochet or whether it is in one or several pieces, nether is the angle of the bullet after it has hit the ground prodictable. It all adds up to a big problem if you do't take your background into consideration before you pull the trigger.I would hate to rely on the 200yard rule given early, I can't say it wrong, I don't know, however I think it has got to be far less than the maximun range of a 22 bullet. This is something I would love to know, how much safe background do I need?