Well there's two things that Wolf sorta missed with his .096 flashhole when compared against the Berdan primer. The flasholes in a berdan primed case are seperated, so the flame actually hits the powder in 2 places, and the primers of that era were considerably weaker than the smokeless primers we have today, and that last bit is why so many folks find better accuracy from either large pistol primers , and or using an over primer or under powder wad, when deadnuts serious about accurate blackpowder loading.
The Springfield manual on the 1873 is a good read for trapdoor nuts as well.