What are you shooting off of? I have been thinking about getting a lead sled to get me out of the rifles issues.
I personally wouldn't use a lead sled with my rifles. Its too hard on equipment and stocks..
I bought a Caldwell Led Sled Solo about a year ago. Maybe I'm doing something wrong but I can shoot better without it. I also find it's awkward to use. I recommend you try somebody else's out before you buy one if you haven't already done so.