I've got a 20 gauge tracker ll and I've got a Boyd's laminated thumbhole stock on it, and I added some weight to the stock using lead round balls from my muzzleloader. I had to drill the stock out under the recoil pad, but I can shoot 3" buckhammers all day long and the recoil isn't an issue.
I sold a 12 gauge Tracker ll before I bought the 20 gauge because of the brutal recoil, but never tried the weight in the stock on that one, and I'm sure it would have tamed it had I done so.
Mine is accurate as a lot of my rifles with the buckhammers, but you really have to shoot different slugs to see which ones work the best out of your gun as they aren't all the same.
For the price, if it's a complete gun with extra barrel you can't go wrong, and let us know how she shoots!