aagaardsport - tried what you suggested no change.
Flintlocke - chambering is 308 norma magnum, the bolt face and extractor have been worked on to accept the rim diameter, manually you can put the shell behind the extractor it just will not go completely behind the extractor and match the bolt face as the bolt comes forward, it goes about 3/4 of the way up into the bolt face and ends there thus shell is not in line with the chamber.
