Measuring "barrel" of handgun.

[Duffy]

I got into an interesting discussion with a fellow at the range one day about how to measure a "barrel".

He said that in order to measure a "barrel length" many people put a rod down the barrel from the muzzle end into an empty chamber till they hit bottom. Mark the muzzle end of the rod and remove it and measure from the deep end to the mark on the rod.

Measured that way my .357 mag. S&W revolver would not be prohibited. But if you measure what looks like a "barrel" with a tape on the outside of the gun, it is prohibited.

I forget what it officially says about measuring "barrels" or handgun "barrels" in the "Rock Rules".

Robin in Rocky

 

[canucklehead]

Your buddy is RIGHT as far as semi-auto's go. That is the 'CFC approved' method of measuring barrel length.

For Revolvers, the chamber is not considered part of the barrel, because they are not physically one part. The barrel has no chamber on a revolver. The chamber is the cylinder!

 

[Rod B]

Revolver barrels are measured from the forcing cone to the muzzle.

Calculating the measurement as you describe is adding the length of the cylinder to the barrel length.

"A" for effort but I don't think the CFC will buy this argument.


Rod.

 

[Dragoon]

Revolver barrels are measured from the forcing cone to the muzzle.

Not quite true. IIRC, the measurement is from the front face of the cylinder to the muzzle.....

 

[Ishootguns]

Even if it is from the front face of the cylinder on a S&W all you are adding is .003 to .007 of an inch. I don't think I would cut them that close if it were me.
Dave

 

[RePete]

Autoloader - with the slide closed, drop a pencil down the barrel, mark the pencil at the muzzle, remove pencil and measure.

Revolver - swing open cylinder and use a set of calipers from the muzzle to the forcing cone.