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Neither did many varieties of "Steel" fare so well as either the laminated steel or Whitworth barrels. As I recall though few if any were so bad as to be considered "Dangerous".
The Parker G grade barrel which took on the order of 30K psi to burst was neither Whitworth fluid or Birmingham Laminated.
It was almost of a certainty made of Belgian Damascus.
Assuming the walls did not become too thin with the chamber lengthening, & with that weight of gun it's highly unlikely, I would have absolutely no qualms about shooting that 1 oz load @ 1060 FPS through them.


Miller/TN
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The fixation here seems to be strictly on the effect of pressure on the barrels.....has anyone thought about what the effect 9k psi has on the action, locking bolt, and joint?

I'm by no means a gunsmith or an engineer, but I would imagine if the barrels are sound (wall thickness, condition, etc) 9k psi isn't going to be a cause for much concern, but I would be concerned for the guns action, locking mechanisms, jointing etc. on a gun that is pushing 100+ years, or in my case a gun pushing 134 years old, I would keep the pressure down to prevent excessive wear the metal on metal joints. 9k seems to be a bit much for my taste, I much prefer to keep pressures in the 5 to 6k range.

Dustin

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My first concern is stock wood failure not barrel or joint. I just don't shoot any gun that I consider the barrels to be marginal in anyway. I have too many guns and too few extra fingers. As to pressure, I do try to keep 12 loads down to 6-7,000 psi. 5k loads are great but sometimes they do not do well in cold weather. All loads are as reasonable recoil as possible. By that I mean one ounce at 1100-1150 fps. 1 1/8 or heavier loads are just not needed to me. I have modern guns to handle heavy loads. Recoil cracks stocks not pressure so keep it reasonable. If your stock is loose get it fixed because loose stocks split easier than ones which the wood to metal fit is tight.

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Quote:
The fixation here seems to be strictly on the effect of pressure on the barrels.....has anyone thought about what the effect 9k psi has on the action, locking bolt, and joint?

While KY Jon only mentioned the stock the recoil is the main concern as well for the other points mentioned. Pressure is of primary concern only to the barrels & at the point it is being measured.
At 20 inches down the barrel it could care less what the maximum chamber pressure is. Lowering chamber pressure does not in & of itself make it easier on a barrel which has a thin forward section.
Load 1 oz of shot to 1060 fps @ 9K psi & 1Ľ oz to 1300 fps @ 8K psi.
Both can be achieved by careful powder selection. That later load will be harder on the gun everywhere except that one short area in the chamber where the 9K is reached. One simply has to look at the total picture. While "MAX" chamber pressure is important, lowering it is not the "Cure All" for all things related to shooting a shotgun. In fact it is the cure for only a very small portion of them. Overall ballistics are far more important for most.


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Well I thought I would add a bit this evening.

My 20ga damascus Flues gun has a thin spot of .018 @ 16" from the breach in the left barrel. I was really apprehensive about shooting it after this discovery, even with low pressure shells.

So, I figured what the heck, I would blow it up or shoot it. Loaded 4ea. hand loads @ 12,500psi per the IMR manual and did the string/proof/behind the tree test. I measured the barrels at a bunch of points before and after.

All is good.
Carry on. ymmv


Last edited by ithaca1; 09/13/16 07:29 PM.

Bill Johnson
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Ouch - I have a 1894 Remington B grade with chain Damascus and a couple of friends have LC's with chain. All are shot all the time with nitro. We're all quite proud of them.

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Paul;
My FE Lefever has chain damascus, I don't worry much about it either. It's wood is around 110 years old now, that would be my biggest worry, but it is still sound & has shot a good many rounds.


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Not saying it is OK, but lets face it, most of our damascus guns have had hundreds if not thousands of rounds of modern off the shelf ammo through them. Plenty of it from Walmart too. they are still here with no holes in them.


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I would bet that Herter's 1060 fps low recoil shell is not 9000 psi. Probably 7000 or less.
JR


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Originally Posted By: John Roberts
I would bet that Herter's 1060 fps low recoil shell is not 9000 psi. Probably 7000 or less.
JR


That was my thought John... Sure wish I could verify this.

Adam

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