underboring/ overboring

[ASavageFox]

Looked at a B grade recently that had the following measurements:

Left Barrel bore: .726 restriction: .017

right barrel Bore: .735, restriction: .018

I assume the right barrel has been honed. I measured the left barrel several times, is it common to find Fox guns that are "underbored" These measurements were taken using a Galazan bore measuring gauge. Both bores were in very good condition from what I could tell.

The following idea may not be the favorite of some on this site and I am looking for opinions b/c I am a novice double gunner....

I would prefer slightly tighter chokes as the barrels are 32"...

The barrels are 1 weight... "generally speaking" would there be enough barrel wall thickness to back bore the left barrel from .726 to about . 738 ? The right barrel is already .735 and we did not have a barrel wall thickness gauge but I make an assumption (maybe flawed) that with it being 1 weight barrels, a small honing of .006 should not destroy the usability of this gun. The gun has already been restored and chokes opened as it was original full and full. What about Briley screw in chokes? Anyone done this before? Cost?

In the end I may be better off just moving on and find something else that I like but I am still learning and really like this gun...

[mc15426378]

I have two guns with Krupp barrels. They measure .720 and .722 on the bores & I have seen other early guns with Krupps that are tight bored so possibly this was the standard boring back then? I would make a guess that the RT barrel on this gun has been massaged.

Are these barrels Krupp?

Mike

[ASavageFox]

yeah Krupp barrels... serial is 22260... early second gen B grade.

The problem is I don't have a barrel wall thickness gauge... and neither does cabela's (the seller)... I could order one but it would take a few days to get... not sure what sort of deal I can work with Cabela's to hold the gun or refund based on thickness found later. I should probably buy the gauge anyways and have been looking... day late, dollar short now.... The only gun smith near me that might have a gauge is busy deer hunting until early december....

[Silvers]

Drew, I'll send you a PM on this. Frank

[mike campbell]

Looked at a B grade recently that had the following measurements:

Left Barrel bore: .726 restriction: .017

right barrel Bore: .735, restriction: .018

I assume the right barrel has been honed. I measured the left barrel several times, is it common to find Fox guns that are "underbored" These measurements were taken using a Galazan bore measuring gauge. Both bores were in very good condition from what I could tell.

The following idea may not be the favorite of some on this site and I am looking for opinions b/c I am a novice double gunner....

I would prefer slightly tighter chokes as the barrels are 32"...

The barrels are 1 weight... "generally speaking" would there be enough barrel wall thickness to back bore the left barrel from .726 to about . 738 ? The right barrel is already .735 and we did not have a barrel wall thickness gauge but I make an assumption (maybe flawed) that with it being 1 weight barrels, a small honing of .006 should not destroy the usability of this gun. The gun has already been restored and chokes opened as it was original full and full. What about Briley screw in chokes? Anyone done this before? Cost?

In the end I may be better off just moving on and find something else that I like but I am still learning and really like this gun...

Sounds possible, either with jug-choking (backboring for only 10-12") or adding a permanent soldered choke. If it were me, I'd send a note to Mike Orlen, expecting him to offer encouragement, but reserving judgement until he'd inspected them.

[birdawg]

For what it is worth, I had Mike Orelen back bore a cylinder & ic set on #1 weight barrels to mod and full.
You milaage may very

[NJdblgun]

Thin wall, permanent chokes may be the way to go - but opening chokes on a B grade, 32" Fox? Ouch. Anyways, the gun has already been altered so much, from your description, that making it usable to you seems reasonable. the cost may be high, and most likely not recoverable should you decide to move on at some point. Sounds like an interesting gun, tho.

[ASavageFox]

Thin wall, permanent chokes may be the way to go - but opening chokes on a B grade, 32" Fox? Ouch. Anyways, the gun has already been altered so much, from your description, that making it usable to you seems reasonable. the cost may be high, and most likely not recoverable should you decide to move on at some point. Sounds like an interesting gun, tho.

The chokes are already open... I want to close them by back boring... not that its any better but yeah the gun is highly modified... pics in the members section under a card check that says "opinions please."

I am going to look at it again today and will see about making a deal. The price is reasonable I think... I am no expert but for a lot of unigue options and a very well restored gun the price seems fair... a LOT LOT less than it would take to make this gun out of ratty B grade.