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Post by 45MAN on Oct 16, 2021 18:47:27 GMT -5
CAN YOU INSTALL A NON-PINNED BARREL IN A S&W PINNED BARREL FRAME? HOW IS IT DONE, e.g. NO PIN OR MACHINE A SLOT ON THE BARREL AND PIN IT OR WHAT? IF NO PIN, WHAT ABOUT THE PIN HOLES IN THE FRAME?
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Post by bradshaw on Oct 16, 2021 20:12:56 GMT -5
CAN YOU INSTALL A NON-PINNED BARREL IN A S&W PINNED BARREL FRAME? HOW IS IT DONE, e.g. NO PIN OR MACHINE A SLOT ON THE BARREL AND PIN IT OR WHAT? IF NO PIN, WHAT ABOUT THE PIN HOLES IN THE FRAME? ***** THREAD TIMING----“timing” threads on barrel tenon to threads in frame for BARREL SHOULDER to snug a specific distance, measured in degrees BTDC (Before Top Dead Center)----secures barrel to frame without looseniess or over-tightening. Process well understood in the black powder era, when guns were made of iron or soft steel. Soundly practiced through 3/4 Twentieth Century. A round barrel without roll markings, rib, underlug, integral or prefit front sight, may be tightened without regard to thread timing. For a barrel with one or more features built-in/attached, thread timing is a must.. It is my impression Smith & Wesson eliminated the pin to save money. Under ownership of Bangor Punta. Sometime in the early 1980’s S&W and Sturm, Ruger over-advanced their timing specification and hired Andre the Giant and Gorilla Monsoon to tighten barrels with a 6-foot pipe wrench. Over-tightening swells the grooves & lands where the barrel shoulder meets the frame. This inexcusable state will cause a super accurate barrel to shoot mediocre, and virtually guarantees leading from cast bullets. A properly timed barrel needs no pin. S&W realized this and eliminated the pin with introduction of the M-629 stainless .44 Mag in 1980. Given proper timing, a barrel without pin groove should work fine in a frame drilled for the pin. Leave out the pin. I you must go whole hog and to pin an unpinned barrel, trust only a smith with real talent and the experience to do the job. David Bradshaw |
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jgt
.327 Meteor
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Posts: 782
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Post by jgt on Oct 18, 2021 6:13:59 GMT -5
The barrels from pinned S&W revolvers I have seen had a slot cut across the surface to provide a pathway for the pin from one side of the frame to the other. I had a new barrel installed on a gun with a hole for the pin and the gunsmith tried to drill the installed new barrel through the hole to re-pin it. The drill bit walked off center in the hard barrel steel. He had to remove the barrel, cut the slot for the pin, then weld up the side of the frame and re-drill the pin hole back to true. It did not take blue well and showed. He was very embarrassed by his mistake. He was a good gunsmith and I liked him a lot so I told him we will chuck it up to "been there, done that, got the t-shirt!". It was a working gun so I never spoke of it until now. He is gone on to his reward so I don't think he would mind. Getting back to the subject, I would want my S&W barrel pinned even if the timing was correct.
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Post by bradshaw on Oct 18, 2021 13:06:57 GMT -5
The barrels from pinned S&W revolvers I have seen had a slot cut across the surface to provide a pathway for the pin from one side of the frame to the other. I had a new barrel installed on a gun with a hole for the pin and the gunsmith tried to drill the installed new barrel through the hole to re-pin it. The drill bit walked off center in the hard barrel steel. He had to remove the barrel, cut the slot for the pin, then weld up the side of the frame and re-drill the pin hole back to true. It did not take blue well and showed. He was very embarrassed by his mistake. He was a good gunsmith and I liked him a lot so I told him we will chuck it up to "been there, done that, got the t-shirt!". It was a working gun so I never spoke of it until now. He is gone on to his reward so I don't think he would mind. Getting back to the subject, I would want my S&W barrel pinned even if the timing was correct. ***** James.... this folly is what I’m talking about. Properly timed, the pin is redundant. Perhaps at one time in the 1800’s it mattered. Of course the arc of the barrel will push a drill sideways. David Bradshaw |
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