Once upon a time I had a Lead Sled. Note that the key words here are once upon a time. What is in the manufacturer's brochure and what happens in real life are two entirely different things, The lead sled is supposed to hold the rifle so there is no rearward movement. Now after learning the hard way that Newton's law of motion will not be denied. I was attempting to sight in a 30-06 Remington 742 for a friend. The first shot seemed OK, but the second shot broke the stock at the grip. Without give in the Lead Sled the motion of the suppressed recoil had to go somewhere. In this case it broke the stock during the suppressed recoil. Not only did it break the stock but bent the stock mounting bolt too. Another issue is that when you put the rear of the stock into the cradle it is now impossible to get a good sight picture since the extra space added at the rear between the lead sled and your shoulder screws up your eye relief so sighting becomes an issue with parallax problems. Got a used stock and bolt from Numrich Arms and repaired the rifle and the lead sled went down the road. I have been using Carlson front and rear bags since. A bit harder on the shoulder but doesn't damage the rifle or scope.