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


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Old 01-16-2015, 09:39 PM
Robert B Robert B is offline
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I am trying to figure out if the newer Smiths have faster barrel velocities than the older Smiths. For example, does anyone have data showing that a newer PC model like the 686 PC 2.5 inch is faster than a model 66 2.5 inch barrel from the 70's for a given load? Thx in advance. I will sit back and see what you guys say.
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Old 01-16-2015, 10:09 PM
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Only the turbocharged models!
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Old 01-16-2015, 10:17 PM
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You would have to chronograph hundreds of revolvers from both manufacturing/rifling methods to reach any valid conclusion as to whether one or the other tended to be faster!

I can guarantee that if there were any speed advantage to the new ECM barrels that S&W would be bragging this up in their advertising!
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Old 01-16-2015, 10:31 PM
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I really think it would be impossible to reach any valid conclusion one way or the other. Chronograph two identical revolvers and you can get wide velocity variation; in fact, I have seen a 2.5 inch revolver beat a 4 inch by nearly 100 fps with the same load. There are a lot of variables that can make a difference from one revolver to another.
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Old 01-17-2015, 05:23 AM
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Quote:
Originally Posted by Pisgah View Post
...I have seen a 2.5 inch revolver beat a 4 inch by nearly 100 fps with the same load. There are a lot of variables that can make a difference from one revolver to another.
Exactly. Here's an example where 2.5 inch S&W 686 Plus (7-shooter) yielded higher velocity than 686 Plus Mountain Gun (also 7 shooter):

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