What you have heard can be correct and has happened...

I need to tell you that I don not have a lead slead and do not plan on having one.. but that is just all a personal thing with me. Others are using them and reall do like like them.

I THINK... the key is not to over load this with lead and remove all the recoil capabilities of the rifle. The rifle's recoil is designed to be an energy relief system... without the proper amount of recoil you can certainly stress and strain a stock. This scope is even easier to break without recoil. The internal system is designed to handle the violence of the shot but needs some recoil to be able to reduce the shock to the internal mechanism.

I would think the lead sled operating instructions would come with the proper way to use the sled and with in those parameters it could really be a nice tool.