Thanks Doug. I think the pressures just happen at different points up the barrels..I'll take advice. The other problem is that I don't think you can buy 28 guage black powder shells over here you have to load em. Will check! Unless any UK guys know of a source.

HammerGuy, no just pits, but that could be enough. Tomorrow is acid test with Ed my barrel man...will report back good or bad news tomorrow for sure!