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Join Date: Dec 2012
Location: Susquehanna Valley
Re: Powder not burning?
Both the GPB and PA Conical have a hollow base. And should expand as a gas seal when the blast hits it.
DipNRip, the GPB should be snug enough to get the rifling cut into it when you short start it. If it is loose then, it might not be a good round for that bore. If it moves or is loose after it is cut to the bore, then it can move unseat far enough during use that you can bulge a barrel if not noticed before shooting. An overbullet card or patch pushed on top of it might keep it in place on the powder. Or try a sticky lube. I know the wax or whatever on the GPB isn't, and had them unseat myself.
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