mark on Colt New Service 357 cylinder?
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Thread: mark on Colt New Service 357 cylinder?

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    mark on Colt New Service 357 cylinder?

    Having a senior moment and was wondering if someone can show me what the mark on a Colt New Service in 357 Magnum cylinder would look like? If I recall this was to designate that heat treatment was performed to protect for higher pressures. Also if someone can provide cylinder dimensions that would help. Thanks, Jim

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    The Consummate Collector

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    Not the best picture but here it is. It is the star on the front of the cylinder between the two top cylinder chambers. It means that the steel used was a high pressure steel designed to take the pressures of the .357 Magnum chambering.


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    rj
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    howdy , the mark [ star ] is for speciacl heat theatment for high spped ammo

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    Great Thank You, was this star used only on the 357 Magnum chambering for the New Service or was this mark made on the SAA cylinders in 357 Magnum also?

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    The star was on the cylinders of some WWII Commandos but what would meaning of that be on a .38 Special revolver?
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    Can anyone provide the measurements on a NS 357 cylinder please? Length and approximate width if possible, Thanks

  8. #7
    The Consummate Collector

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    Quote Originally Posted by trains2planes View Post
    Can anyone provide the measurements on a NS 357 cylinder please? Length and approximate width if possible, Thanks

    The .357 New Service cylinder is 1.627" long and 1.700" O.D.


 

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