Not my cast boolit, but Berry's plated .452 230 grain flat point over 6.5 gr of HP-38 and a cci large pistol primer. Most I shot seemed fine, but a bit light. But, I stopped after my second squib that puked unburnt powder down my barrel and cylinder of my Virginian Dragoon. The ones that blew powder seemed to show cratering of the primer more than the others, more soot, and harder to extract. All leading me to overpressure.... except the unburnt powder. Went back to 225 gr lead pills over 5.6 gr of 38 from the same can and all was good. What am I missing?
45 Colt mixed brass Interarms Virginian Dragoon