T/C 15/16" barrel

[NMHawken]

What would be the largest smooth bore a 15/16" barrel could be opened to?

 

[ChuckJonesWagon]

Before that can be answered, how deep are any of the sight screw holes drilled?

 

[westrayer]

You probably won't get him to answer, but Bob Hoyt would know. He is crazy busy so phone calls are often not answered for days

 

[Eric Krewson]

Provided the barrel isn't drilled and tapped for a scope with deep holes, the barrel can be turned into a 20ga if I remember correctly.

Update; another guy just posted the same question and said he talked to Mr. Hoyt. Perhaps my info is incorrect, he said Bobby would go to .60 smooth on a 1" barrel.

 

[NMHawken]

So the holes for the rear sight are as follows: .010 for the rear hole, and .006 for the front hole. I was hoping for a 58 smoothie, but I am thinking a 56 is more likely.

 

[nhmoose]

.002 is not big difference.

 

[ChuckJonesWagon]

Well....if I do my math right the distance flat to flat of a 15/16" barrel is .938. As the table below shows, after taking into account the drilled hole of ten thousands, you have .169 of metal left.

I don't recall what the "safe" amount of metal is, so that would need to be researched and verified.

 

[Grenadier1758]

@ChuckJonesWagon, if your threaded hole is 0.010 inches deep, then it is only engaging 1/2 a thread. Tha max depth is more like 0.100 to engage 5 threads. I think the max is more on the order of 0.100" leaving 0.079" of barrel wall thickness. I would be looking to set the minimum barrel thickness at 0.100" or a screw hole depth of about 0.079" which for a screw of 48 threads per inch would have about 4 threads engaged.

 

[NMHawken]

Yes sir, error on my part, the rear hole is .110, and the front is .106. That's what I get for rushing.

 

[ChuckJonesWagon]

@ChuckJonesWagon, if your threaded hole is 0.010 inches deep, then it is only engaging 1/2 a thread. Tha max depth is more like 0.100 to engage 5 threads. I think the max is more on the order of 0.100" leaving 0.079" of barrel wall thickness. I would be looking to set the minimum barrel thickness at 0.100" or a screw hole depth of about 0.079" which for a screw of 48 threads per inch would have about 4 threads engaged.

Great point. Always measure twice, cut once, and never, ever trust an internet post without a third party verification!!

 

[Frontstuffer070]

I recently had Mr. Hoyt bore a .54 T/C to .56 SB. He told me he could take that barrel all the way to 20ga if I wanted.