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Message started by butlersrangers on Apr 15th, 2019 at 7:51pm

Title: Re: More Bolt Trivia
Post by butlersrangers on Apr 16th, 2019 at 8:46pm
FWIW - I got to thinking (always dangerous) and started measuring the depth of the bolt-face recess on four model 1898 Bolts.
(The distance from the front edge of the bolt-flange to the bolt face, near the firing-pin hole).

Bolt condition varied from 'visibly worn' to 'new old stock' and I took five measurements on each bolt-face. I rotated each bolt so as to measure in different spots, using the 'depth gauge' provision of my vernier-caliper.

I found, I was getting .005" variation between my minimum and maximum depth measure on each bolt. The NOS bolt only showed .003" variation.

The maximum bolt-face recess I measured was .066".
The minimum bolt-face recess I measured was .058".
(This difference is less than the thickness of two sheets of typing paper).

I averaged the five readings, I obtained, with each bolt.

For all four bolts, the average of five depth measurements came to .0608" (basically, 61/1000 of an inch depth, from front of bolt- flange to recessed bolt-face).

I found it kind of amazing each bolt gave the exact same average. (.0608").

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