EDM rifling

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EDM rifling

S&W Revolvers: 1980 to the Present All NON-PINNED Barrels, the L-Frames, and the New Era Revolvers

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07-30-2016, 06:49 PM

swforum

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EDM rifling

Does anyone know when S&W changed from broached rifling to EDM rifling for revolver models 25 and 625, 29 and 629?

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07-30-2016, 07:15 PM

Pizza Bob

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It is ECM, not EDM. Per this article, they started in 1993...

Firearms History, Technology & Development: Rifling: Manufacturing: Electro Chemical Machining

It is my understanding that PC guns still use broach cut rifling.

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