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Discussion Starter · #1 ·
Does anyone know the bore diameter of the model 50 12 ga? I am suspecting it is .735 but only guessing. Trying to save a trip to the gunsmith to get the barrel mic.

TT, you there?
 

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Just did one, it was .7295", but I would say anywhere between .727-30" would be within specs.

The only .735" guns I am aware of were SuperX's, and Competition 101's (Diamond grade T&S/LiveBirds/6500/5500 etc etc), the later 101 comps also had lengthened cones (1 1/2")
 

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Discussion Starter · #3 ·
Well, thanks, TT. I have a 26" barrel fixed choke marked Mod. and I checked the choke and it is .726. How can a Mod. be .726 with a muzzle bore diameter of approx. .730? The full 30" choke measures .695, which would be an effective choke of approx. .035.
 

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Well, it really can't but unless you have known the gun all its life, anything could have happened. That doesn't even meet Winchesters skeet choke measurements, someone could have opened it up. How smooth is the choke? Can you see any bumps or ridges in the choke area?
 

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Hello 4th down: If you truely have a 26in. barrel marked Modified, it's been cut. 26in barrels were only offered with an Imp/Cyl or WS-1 (skeet) choke.(according to my winchester literature) Which would explain the large inside diameter you now have.

Regards Dave
 

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Discussion Starter · #6 ·
TT & Only Winchesters - you are both right.

I thought I knew the history of the gun but obviously don't. The choke has been changed to .004 (.726) constriction. My dad purchased this gun new in 1955 with full choke 30" barrel. He then purchased a mod. barrel (he thought), it was passed off to him as a new mod. barrel and he didn't check it or ever shoot it. He didn't have to - hardly ever missed with the full.

Took the .004 choke barrel out to the skeet range last week and shot if for the first time (no vent rib and no sight). It shot lights out with #8, 1oz. loads. Heavy as hell but once you get it moving you cannot stop it - hard to miss although I did manage to miss a couple. It is a shooter and we all know what that means so I think I will re-build it.

TT - it says on the barrel that it is "Winchester Proof Steel." What does that mean? Is this a carbon steel barrel? Compared to todays guns, is the steel different? Something makes it special because it is a real shooter.
 

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Hello 4th down: Winchester Proof Steel is heat treated chrome molybelenum steel (alloy) This was delveloped in the late 1920s' and came out in 1931. Prior to that Winchester barrels were Nickle Steel.

Regards Dave
 
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