Quote:
Originally Posted by Olle
Rich,
How did you figure the center on that brass insert?...I was thinking about making a tight fitting insert, then turn a centering punch that fits snugly in the barrel and mark the hole from the inside. Once the hole is drilled, it would be easy to center and drill the taper for a live center.
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That's one way. Here's another - use a 12" long 1/4" aircraft length drill instead of a punch. Make two small 30 cal barrel bushings with 1/4" holes, put them in the Mauser bore, and turn the drill just enough to make a dimple in the brass plug. Then take the brass plug out, center drill the inside end with the dimple, put it back in and drill it all the way through with the 1/4" x 12" aircraft drill. Then center drill the outside end. You'd hold the receiver clamped to an angle plate, with the brass plug secured with a clamp or a stop of some kind. Center drill the outside end would be done with a 4-jaw chuck holding the rectangular brass plug and using a 1/4" ground rod as a center. One idea.
My methods evolve as I get more tools, and if it was done some years ago I forget all the steps.
