When I got my Mountain Gun I traded the stock grips, thin Pachmyers, for some S&W finger grooves that I altered to fit my hand. They felt good but were uncomfortable with full power and heavy loads.
A few years ago I bought a set of Harrett Stocks, custom built to a pattern of my hand. I also started reloading. Those two changes made a world of difference.
They are Harrett, Jordan Trooper Stocks in fine walnut.