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ed good Offline OP
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logic says, so long as there is sufficent metal in first foot or so of barrel, catastropic barrel failure should not occur...

fox 20 and 16 gauge guns were built on the same frame size...

o frame parkers came in 16 and 20 ga...

it would be educational if members here with any of those guns would post barrel wall thicknesses here...

re 16 ga fox...have three for sale at the moment, two philles and one utica gun...all three measure .090 in front of chambers...


once has a light 16 ga fox that measured .085 in front of chambers...new owner promised to shoot rst 7/8 ounce loads only...

this barrel wall thickness thing does not seem to apply to american made guns...but does seem to apply to some very light weight european guns...a particular french made gun comes to mind...customer wanted chambers opened to 2 3/4"...brought it to old ed for evaluation and alteration...he measured barrels in front of chambers and muttered..."not a good idea"...there may have been others, but i dont remember...i do remember him opening chambers on quite a few american made guns...

boy do i miss him...i feel like lee at gettysburg...handicapped without jackson and blind without stuart...

Last edited by ed good; 09/20/22 11:00 PM.

keep it simple and keep it safe...
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mc Offline
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If you alter a chamber length it will be out of proof ,if a gun has multiple barrels and you lengthin the chambers it will be out of proof .buy a modern gun with modern steel proofed for modern ammo. a European 2.5 gun proofed for 1 1/8 oz cip loads is not proofed for 2 3/4 sammi ammo .no matter how much you beat the dead horse it's still dead

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Originally Posted by skeettx
I just lengthened a GECO Belgium gun to 2.75, I also opened the chokes to Skeet/IC
It is my gun, for me to shoot, and if I hurt the value, that is OK to me,
The chambers are stout.

I do load 2.5 inch 16 gauge ammo, for my old Kreighoff drilling and my Win Model 12s
but I have flats upon flats of 2 3/4 ammo.
I am happy

Mike


I think I remember measuring bores, chokes and such on one of those guns a long time ago. I don’t recommend it, but, I’d bet you can stuff a 20 gauge round in those bores, put a 12 in the chamber, fire it, and not hurt anything, save the two rounds.

It had very heavy barrels ,as I recall.

Best,
Ted

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ed good Offline OP
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mc, please explain your criteria for defining a modern gun with modern steel barrels...

your statements are provocative but meaningless without details of pressure differences between 2 1/2 cip and 2 3/4 sammi spec loads...

and do you have evidence of many barrel failures of 2 1/2 guns altered to 2 3/4 guns...i do not...

also, a common practice of some who shoot vintage guns is to use light loads, usually about 10 percent less shot than standard load gun was designed to shoot, with velocity less than 1200 fps ...in an effort to reduce pressure to protect metal and to reduce recoil to protect wood...

this practice has been going on for some time by a lot of shooters, without reported problems...

and even better, rst built a very successful business creating black powder like pressure loads with smokeless powder...hopefully rst will resolve their componet supply issues soon and be back in business...

Last edited by ed good; 09/21/22 12:46 AM.

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Any gun that has safely endured 100 years of any load available in a hardware store should be able to endure another shot. However, if you take a bunch of metal out of the inside of the bore, all bets are off.

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No edd do some work yourself.

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Ed is only bringing this up cause he has some English guns for sale for once.

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ed good Offline OP
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doctor doom an his cohort black cloud...


keep it simple and keep it safe...
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mc Offline
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And might be out of proof

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Originally Posted by ed good
i feel like lee at gettysburg

Ha whistle, that's quite an incomprehensible stretch.


May God bless America and those who defend her.
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