This week someone brought me a Winchester 60A single shot bolt action to assemble.

It shares a feature with the chipmunk, the firing pin must be pulled to cock it.

There was no galling. The firing pin pull is easy, smooth, and consistent. No metals of equal hardness rubbing.
It looks like Winchester built in the 30s what Browning designed in 1900
http://www.google.com/patents/US632094

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