Re-Barreling an M1896 Mauser

[sheepherder]

Originally Posted by Olle

Have you tried to measure the runout on an intact barrel/receiver, or do you know what a normal runout would be?

If you mean is the original C96/M30 barrel OD concentric with the bore, I'm not sure...I could chuck my C96 barrel extension up and dial indicate it, but I'd bet it's at least a bit off-center as to the OD...

Here's my setup - the first pic is some of my ground drill rod blanks that I use for bore measuring...And by clamping my 7.6mm rod in the chuck and turning the C96 barrel extansion (not the chuck) by hand, I got the indicated runouts...

When I was done with that, I chucked my C96 barrel extension between a center in the chuck and my brass insert and got exactly the same results...Yeah, I was surprised too...