[Dean Romig]

Originally Posted by edgarspencer

This is a subject that comes up quite often. The Forcing Cone is the tapered section of the barrel bore, immediately in front of the chamber, The larger diameter being the end of the chamber, and that point, where many of the questions originate, is the Chamber Length. The point of these questions is, invariably, so the shooter knows what the appropriate length shells can safely be used in the gun.

Because of the knowledgeable members, we accept that Parker Brothers bored their barrels to dimensions based upon the theory that a certain amount of the shell, upon opening when fired, extends into the forcing cone, in order to form a (better?) gas seal.

I have several questions, and hope to learn from knowledgeable people, and not just opinions, are the following;
A, Did Parker guns, made prior to the introduction of paper hulls, even have forcing cones?
B, Was the amount of opened hull withing the forcing cone, on an unaltered gun, always the same. To answer this, historical data most probably is necessary,i.e. factory records, or hang tags.

After the full acceptance of paper shells, a variety of lengths were available.
I have guns with 2 3/8" chambers, which I accept as fact, were intended for 2 1/2" shells. Likewise, I presume those of my guns with 2 5/8" chambers were intended for 2 3/4" shells.

Dean recently spoke of one of his guns with a 2 9/16" chamber, so my question was what shell was that gun intended to digest.

I have a hang tag (but not the gun) which states the gun was intended to shoot 2 5/8" shells (see the attached image) so what chamber length would that gun have been bored?

Are there any others out there, that lay awake at night thinking about this stuff, or are they all still trying to understand quantum physics and subatomic particles?

The chambers were predominantly machined the same, within a specific gauge and within a less specific time period, and that isn't the factor in the equation that would ever change. The thing that would change from one paper cartridge maker to another is the open length of the cartridge.
I would therefor say that due to this factor, the length of the cartridge that opened into the cone varied accordingly.



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