Parker Chamber

[Dean Weber]

Richard,

Even though these discussions are a repeat of others over the years, I find them fascinating. To Researcher's point, even documentation/advice on hang tags is very confusing. In my estimation, chamber length, as a safety concern, is overstated.

For example, I just measured a John Dickson 12 ga. with documented/proofed 2.5" chambers. However, my chamber gauge tool measures them a little more than 2 9/16. I also measured a James Woodward 12 ga. which is documented/proofed at 2.5" but I measure them at 2 5/8. These are documented guns from notable gunmakers where both went through proofing houses. Yet, the chambers are definitely not exactly 2.5". Obviously, these were not lengthened to 2 3/4.

Then if you add in the differences in shell length after the shot, we get many different lengths of spent shells, even though they may be marketed as a 2 3/4 length. My point is an AA shell is 2 11/16 long after firing. Should I be concerned about 1 or 2/16's overlap in my expensive Dickson/Woodward guns which were only proofed at 2.5"? The answer is no for me, as I know my barrel condition is good.

My recommendation is to concern yourself with condition of your barrels first and go have fun 2nd. The chamber length in most cases is a distant concern. That does not mean to disregard pressure or velocity in your determination.

[Pa SxS]

I agree Dean.

[Dean Romig]

A few of Morris’s loads are 1150 psi.






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[Dean Romig]

In my opinion, wall thickness at the juncture of the chamber and the beginning of the forcing cone is far, far more critical than chamber length differences of a sixteenth or an eighth of an inch.





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[Richard Mason]

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I tried a few times with the paper trick of sliding it to touch the start of the force cone with no luck for me , I could feel it good enough

It sure looks longer then 2 1/2 inch to me , I’m going to search out someone who has a chamber measuring device

The bores looked really good

and this took my breath away when I unboxed it after work , it’s more then I could of hoped for , the colours in the CCH is so nice , looks like a old patina on it
1910 Parker , 30 inch barrels ,
I can’t wait to shoot it ,

[Harold Pickens]

Handsome gun, very nice!

[Cold Spring]

I've seen a letter reference from a principal at Parker to Capt. Charles Askins and dated in the 20's that states unequivocally that Parker chambered 12ga guns to 2-5/8" and intended for 2-3/4" shells at factory pressure level. I'll look for it later and will post the content if I can find it.

[Richard Mason]

Originally Posted by Frank Srebro

I've seen a letter reference from a principal at Parker to Capt. Charles Askins and dated in the 20's that states unequivocally that Parker chambered 12ga guns to 2-5/8" and intended for 2-3/4" shells at factory pressure level. I'll look for it later and will post the content if I can find it.

Please do find it , that will put my mind at ease ,
Thanks

[Big D]

Richard - Poor man's answer. If you have a small machinist's rule, turn it on its edge and slide it into the chamber until it begins to reach the chamber neck, and light will show between the rule and the chamber wall. Read the rule. Bingo

[Cold Spring]

Excerpt from the reply letter from Parker Brothers to Capt Charles Askins:

“Replying to your letter of December 17th [1920] …... Referring to the cone, we ordinarily permit our shells to lap into it 1/8-inch but as a matter of fact we have found that the majority of guns will shoot a better pattern with even more lap than this. …… In user’s hands we do not advocate the use of longer shells than those which give 1/8 lap.

Parker Brothers, per W. A. King”