I did about the same thing as Montana. I used a 3/4" piece of copper pipe, it fits the bolt hole perfectly. I put one end in sand, and poured molten lead into the pipe, leaving a 1/4" space at the end. Once it cooled, I used silicone caulk to fill the 1/4" space I left both ends of the pipe. That acted as a good buffer in much the same way as Montana used the leather. My T-shirts aren't all brand new, but they aren't that thin, even with all of that extra weight in the stock, it still hammered me when shooting level 2 loads from the bench. I stress from the bench, because of the angle your holding the rifle at the bench, and leaning into the steel butt plate. Offhand the rifle shot fine, and you didn't notice the recoil nearly as much. I spent quite a bit of time shooting off the bench while working up loads for this rifle. After installing the recoil pad, I no longer needed the extra weight in the stock bolt hole. The rifle can jump off the bench when fired, and still the recoil won't bother you in the least. I bought mine last January, and it's by far my favorite rifle. Without that weight, it becomes much easier to carry while hunting, with the weight, It was somewhere near to 12 pounds total. BTW-I took a deer with it a month ago. A one shot knockdown.
Don