Barrel Wall Thickness

[LongShot]

In perusing descriptions of Parkers for sale on the web, I've noticed that a few dealers list barrel wall thickness while most do not. Is it risky to buy one without this data? Is there any "rule of thumb" for minimum thickness, like for 12 or 20 ga barrels? Thanks for any advice!

[C grade]

Paul
I feel it is absolutely necessary to have a barrel wall thickness before you buy any Parker. On a 12 ga I use .025 as a minimum. Many a pitted barrel has been honed and that will let you to look for what else has been done to the gun
David

[winplumber]

For what type of steel is the min .025 is this for damacus and fluid both as well as stub and twist I am wondering.

[LongShot]

Would it be different for a 20 ga? I should have said before, that's my primary interest. Thanks

[Harry Collins]

Paul,

There is greater pressure as the gauges go from 12 to 16 to 20 etc. I would want a little more than .025 but could be mistaken.

Harry

[C grade]

Dam and fluid

[Rod N. Gunn]

I think I'd want to know who's doin' the measurin' and how... its a bit of a tricky business.

[Drew Hause]

The Field March 7, 1891 Vol 77:325
http://books.google.com/books?id=inQ...=0#PPA9-IA6,M1



UK Working Standards recomended minimum wall thickness measured 18" from the barrel breech from Double Gun Classics p. 56, Vol. 1, No. 4 Jan-Feb, 2006:
2 1/2" 12g- .028
2 3/4" 12g- .032
Re-proof recomended minimum- .024

The Hunter's Encyclopedia from the German proof house: minimal wall thickness at end of chamber, regardless of length, for 12, 16 & 20 gauge guns should be 2.3mm (.0906") for 'ordinary good steel' or 2.1mm (.0827") if a 'Special Steel' was used. For the 24 & 28 gauges, due to their higher pressures, 2.4mm (.0945") was recommended.
Minimal wall of .6mm (.0236") was recomended in the "forward third" of the barrel.

[Bindlestiff]

Originally Posted by Drew Hause

The Field March 7, 1891 Vol 77:325
http://books.google.com/books?id=inQ...=0#PPA9-IA6,M1



UK Working Standards recomended minimum wall thickness measured 18" from the barrel breech from Double Gun Classics p. 56, Vol. 1, No. 4 Jan-Feb, 2006:
2 1/2" 12g- .028
2 3/4" 12g- .032
Re-proof recomended minimum- .024

The Hunter's Encyclopedia from the German proof house: minimal wall thickness at end of chamber, regardless of length, for 12, 16 & 20 gauge guns should be 2.3mm (.0906") for 'ordinary good steel' or 2.1mm (.0827") if a 'Special Steel' was used. For the 24 & 28 gauges, due to their higher pressures, 2.4mm (.0945") was recommended.
Minimal wall of .6mm (.0236") was recomended in the "forward third" of the barrel.

Thanks Drew, I incorporated this information and some of the other comments to improve this FAQ.

Thank all for your input, it helped too.

[Twice Shooter]

Dr. Drew,

Please check your PM. Tom