I looked on Herrett’s website and didn’t see what you referred to. If I wanted wood grips for a .500, I would probably try to get them fitted as closely to the grip frame as possible. Gaps in the grips between the rear of the grip frame and the wood would weaken the wood where you don’t want it weakened. Of course, one test is worth a thousand “educated” opinions. Try it and see. It may be fine. If you liked the shape of the grips with full power .44 in a Mountain Gun, you may like the same grips on the .500. Then again, maybe not. I continue to look for suitable grips for my .500s. So far, I haven’t found anything better than the factory grips, and they are a little too small for me, but that is one area the gloves help correct.