I just use the Leadsled for bench work, I've never noticed any recoil when hunting, even shooting turkeys with 12ga 3½" 2¼"oz loads, so recoil while hunting isn't a concern.
Some sled users have complained of broken stocks while using sleds, but if a fella uses a little common sense and doesn't use too much weight in the sled, just enough the take the sting out of the recoil, it works great. For normal heavy recoil rounds like Ruger loads in the 45-70 or the 500S&W Handi, I don't use any weight on the sled, just the weight of the sled itself, but I do tie a stretchy ¼" nylon rope between the front of the sled and the front of the bench leg which provides some give, but slows the sled down and makes extended shooting sessions possible, the sled isn't anchored in place which could be bad for the stock. For the 499HE, I may need to add some weight to the sled, but I'll try it first without it.
Tim