John, I've considered that but lack the proper equipment, the acp stuff, and the talent. HalfNutz, I thought of doing that but think there must be a better way than exposing internal threads directly to the combustion. SL, yes, makes absolute sense and I considered that butit would require a whole new set of datadetermined usingthis particular breechplug. We need some tiny compression seals that fit inside the primer pocket of the plugs.