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cdoc42 · November 23, 2017, 09:14 AM

Arbrn rngr and Joe-ker, if you're in the mood to compare your method to this one, have at it: No speciall equipment needed.

Drop your bullet into the chamber and lightly tap it with a cleaning rod so it stays in place but is not jammed into the rifling. Put the cleaning rod (cannot be a coated rod) into the muzzle and gently lower it until it contacts the bullet. Make a line on the rod with a fine tip "magic marker" that is half-way around the rod. Knock the bullet out. Take your dummy cartridge that you made in the way you described, chamber it, insert the rod and make another line completely around the rod.

If you only see one line around the rod, both bullets are touching the rifling at an equal position. If your dummy round produced a line that is below the half-line, your round is jammed further into the rifling rather than just touching. If your goal is to seat that bullet 0.02" away, in this circumstance it is really closer than that.

The problem is you may end up with a round that is into the rifling (due to manufacturing variation as described by USSR above) and pressure increases.

November 23, 2017, 09:14 AM	#25
cdoc42 Senior Member Join Date: March 13, 2005 Location: Pennsylvania Posts: 1,687	Arbrn rngr and Joe-ker, if you're in the mood to compare your method to this one, have at it: No speciall equipment needed. Drop your bullet into the chamber and lightly tap it with a cleaning rod so it stays in place but is not jammed into the rifling. Put the cleaning rod (cannot be a coated rod) into the muzzle and gently lower it until it contacts the bullet. Make a line on the rod with a fine tip "magic marker" that is half-way around the rod. Knock the bullet out. Take your dummy cartridge that you made in the way you described, chamber it, insert the rod and make another line completely around the rod. If you only see one line around the rod, both bullets are touching the rifling at an equal position. If your dummy round produced a line that is below the half-line, your round is jammed further into the rifling rather than just touching. If your goal is to seat that bullet 0.02" away, in this circumstance it is really closer than that. The problem is you may end up with a round that is into the rifling (due to manufacturing variation as described by USSR above) and pressure increases.