*** Originally posted by mark ***
While that might work, it is the rather poorly designed piston/cartridge case seal area that's the ultimate problem. Really, the best solution is to use different cartridges like the Marushin cartridges that I suggested. Cartridge conversions really aren't that hard and can be done with a few tools and some knowledge of the cartridge/detonator relation.
The hole on the Hudson Scorpion's cartridge case could be tricky to fill. However, soldier could be used or epoxy. But, however it is accomplished, it will still be a badly designed cartridge...