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« Last post by Dphariss on Today at 01:16:33 AM »
I am not a metallurgist or even a decent lock maker. But I have played around with such things for just about 50 years now. Cast springs are an abomination. When I was building BPCR match rifles for people in the 1990s I would pitch the cast mainsprings and put in CIVIL WAR SURPLUS springs that SFAIK were made by a sub contractor in Bridgeport Conn. Who did lock internal parts for Spencer and Sharps. I suspect since they are all the same that there surely was machine forging and then some milling machine work, and obviously some filing, again they are all interchangeable, a made in the 1860s drop in part for a rifle made last week. They had to make 150000 or more of these things in the course of that war along with similar numbers of other internals. So making high quality lock springs in large numbers before modern investment casting is not new. CNC machines have been an upgrade to the 1850s-60s operation. I think that Jim’s springs are great. Very consistent. Strong and lively. Now is it possible that one of Jim’s springs might break? ANYTHING is “possible”, but “likely”? That is a different thing.
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