I'd solder a shim to the primer stem if it was mine.......something about .030" thick like a piece of brass shim stock...........or epoxy if solder isn't practical.
My two issues with doing something like that is the fact that it works good with the other cartridges I've used (specifically 303, I haven't tried anything else yet) plus I can buy the shell holders for only a few bucks a pop, so the cost for fkking something up is much less if I modify the shellholder vs the rest of the tool.























































