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Old April 30, 2012, 10:47 PM   #5
Webleymkv
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Join Date: July 20, 2005
Location: Indiana
Posts: 10,170
The 66-1 is considered by many to be the best of the series. The main change from the 66 no-dash to the 66-1 was to move the gas ring from the yoke to the cylinder. This was done because shooting large amounts of magnum ammo in 66 no-dash revolvers would sometimes cause the gas ring to heat and swell enough to bind the action. The -1 solved this issue but still retained the desirable pinned barrel and recessed charge holes which were eliminated with the -2 engineering change.
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