I have a .475 Turnbull on a Browning 71 conversion. The pad is a Limbsaver, and cuts the recoil down to "managable" from the bench, or berm. If you are going straight steel cresent plate, I think it's going get your attention...
If you are going to carry the rifle, I'd pass on the added weight, and invest in a quality recoil pad.
The shop is 15 minutes away from my in-laws house, if you are ever the area, it's fully worth the time to stop by. They are just helpful and friendly in-person, and you may get to see some really cool projects.
