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#588704 12/31/20 02:08 PM
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Hello
I own a Darne R13 in 12 ga. and the mouth of the left chamber is .803 in. I am cutting down win.AA shells to fit the 2.5 in. chambers but the maximum allowed cartridge size at the mouth of the chamber is .810 and the actual unfired AA shells measure .806 in. or more. Obviously I can't chamber them. I have managed to swaddge down the AA shells to .803 in. but this makes for very hard extraction.
1. Why are Darne chambers so tight?
2. Is any ammo available to fit these chambers?
3. Should I ream the chambers?
Regards
DblFixer

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Hello DblFixer
Welcome on your first posting smile

Can you post the proof marks?
Maybe a 2 inch chamber?

Have you called RST?

http://www.rstshells.com/store/m/2-12-Gauge.aspx

Welcome
Mike

Last edited by skeettx; 12/31/20 02:18 PM.

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Originally Posted By: DblFixer
Hello
I own a Darne R13 in 12 ga. and the mouth of the left chamber is .803 in. I am cutting down win.AA shells to fit the 2.5 in. chambers but the maximum allowed cartridge size at the mouth of the chamber is .810 and the actual unfired AA shells measure .806 in. or more. Obviously I can't chamber them. I have managed to swaddge down the AA shells to .803 in. but this makes for very hard extraction.
1. Why are Darne chambers so tight?
2. Is any ammo available to fit these chambers?
3. Should I ream the chambers?
Regards
DblFixer


What is the chamber size on the right barrel? Do you have trouble with that chamber?

Ive never heard this exact complaint leveled against Darne guns, in general. It would be my guess that it was measured at the proof house, and passed spec. But, if you dont have problems with the right side, it might need to be reamed, or, perhaps polished. Just me, maybe, but, Id make them match, assuming the right side isnt sloppy.

Best,
Ted

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Originally Posted By: skeettx
Hello DblFixer
Welcome on your first posting smile

Can you post the proof marks?
Maybe a 2 inch chamber?

Welcome
Mike


Pretty sure he is having problems with the ID of the hole, not length.

Best,
Ted

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The left chamber is .806. Still a problem. The proof is 6.5 and crown over PT. and epreuve triple. Also has Hors Councours? and
three stamps. I have a 165 kb jpeg on my computer but can't figure out how to post it, The post image asks for a url?

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By unfired, I assume you mean factory fresh, never fired. I have a French resizing die made by Manufrance over 50 years ago and as soon as I find my elusive dial calipers I'll measure the ID and compare with what you have. I was able to insert NIB Win. game loads into the die, but unfired Fiocchi hulls were a tighter fit. I also assume you have thoroughly cleaned the left chamber for potential plastic build up.

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Originally Posted By: DblFixer
The left chamber is .806. Still a problem. The proof is 6.5 and crown over PT. and epreuve triple. Also has Hors Councours? and
three stamps. I have a 165 kb jpeg on my computer but can't figure out how to post it, The post image asks for a url?


Email me the picture, and I will post it, here. Good clear shot of the flats.

Best,
Ted

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Picture. Most of the flats, anyway:



That is an old gun. The 6.5 chamber marking, per our friend Argos research, puts it around 1910 or so production. Your measurements tell me it is a 12 gauge.

Did you measure the right side of the breech?

Best,
Ted

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Right is .803 in. Left is ,806 in.

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Yes by unfired I mean factory fresh. The chambers are clean and shiny.

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