Get a dowel that fits snug and I put a single edge razor blade in at about a 15 degree angle. The blade needs to be tapped in with a hammer. First a thin knife blade is tapped in for a little bit to get the razor started. I also drill a hole in the end and install a machine screw, say a 8-32. This can be screwed in or out to fine tune the cut. If your shell is 3.5 and you want 2 5/8, put the dowel in the shell, with a pencil make a mark on the dowel, pull it out and subtract 7/8" and make another mark. This is where the blade sits about 15 degrees from perpendicular. I put the shell in my left hand and the dowel, with my thumb on the razor, in my right hand. I've found by slightly bending the top part of the razor [ the safe side ] I can make the razor feed in for a slow cut or a fast one. You may ruin a shell or two getting the feel for everything. A cheap table model wood cutting band saw from harbor Freight would work good, be quicker, and you could forget about playing around with dowels and blades.
Ron, I never had any luck with nitro powders in the Magtechs. I believe it's because of the lack of a crimp. My Accurate gunpowder handbook has a article about the importance of a good crimp and how it effects pressures. Before I sold 300 Magtechs I tried 28grs of PB - my normal load was around 18 to 20grs. I was still getting bloopers. I believe Charlie has had some success with them. God luck to all. Paul
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Paul Harm
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