I have a Ishapore 2A that I sporterized some time back. At the time I had it drilled and tapped and put one of the Parker Hale scope mounts on.
Well, that mount design just won't stay tight due to the cast aluminum against the stripper clip bridge and the bridge gouging into the aluminum.
I want to try to make my own mount out of flat steel and some creativity. My question is how do I find the center of the bore along the length of the action? I know the bridge is at a different height than the front of the receiver, and want to account for this difference.
I thought about a 36" piece of 1/4" threaded rod and some tapered rubber faucet washers and a couple of nuts. Then I can use the depth gauge on my calipers to obtain a reference.
How do "real" 'smiths do this for a custom mount?