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Old 05-31-2011, 12:58 AM
Kavall Kavall is offline
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Quote:
Originally Posted by 500 Magnum Nut View Post
All S&W revolvers use a 36 TPI tap. The pitch is .0277 inch. This means 1 full turn of the barrel will move it .0277.
To further expand on this, removing from the shoulder .0277" allows the barrel to turn one revolution. One full turn is 360 degrees. So you take .0277 and divide it into 360 parts. So you know how much to take off the shoulder to turn the barrel one degree. Then multiply that number by how many degrees you actually have to rotate the barrel.

Hopefully that makes sense. It's really quite simple once you wrap your mind around it all.
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