If you want to reduce recoil, you should probably check out these two videos.
The difference between this approach to a lead sled is that the rope or strap will stretch under recoil as opposed to a firm association with a weight with a lead sled that causes an abrupt change in harmonics. Accuracy actually improves with this type of shooting.
The stretch slowly reduces recoil without the shooter having to shoulder the rifle at all.
Then you also have the option of using both in conjunction with each other where the strap is combined with some shoulder pressure, if you feel the need. Myself, I usually hang back with my shoulder and let the rifle recoil freely during matches, but I do cheek it firmly into the bag.
It is important to note that the preload is in reverse to a traditional forward pressure and that you actually pull rearward to load the system.