I myself didn't, but it works extremely well and @Roy H pretty much has lead wherever feasible? He could answer those questions. I only know it's heavy, and when I want to tip it over to change a trigger or whatever, the gun "wants" to right itself. Roy did in my opinion, the perfect heavy gun, as it's drivable despite being large and heavy.@tom, you learn where and how much weight works best
in what areas on this stock?