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Hot Topic (More than 10 Replies) Caliber Decisions! (Read 807 times)
Chris W
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Re: Caliber Decisions!
Reply #15 - Dec 21st, 2025 at 9:58pm
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Ok, I got my calipers out again and this is what I’ve come up with, the best I can get on rim diameter is .668, chamber opening .560 and muzzle is .502. Those are the best measurements I can come up with. 
Chris W
  
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ssdave
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Re: Caliber Decisions!
Reply #16 - Dec 21st, 2025 at 11:45pm
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Given those dimensions, you're back to something that is close to a 32 ga.  I'd try that next.
  
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Dellet
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Re: Caliber Decisions!
Reply #17 - Dec 22nd, 2025 at 6:13am
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Sounds like a 50-70 liner that was not rifled. The difference would be case length. 2 1/4” for the 32 gauge and 1 3/4” for the 50-70.

Seems like a reasonable conversion in the day. Same basic liner as the other 30,000, just no grooves cut.
  
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George Babits
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Re: Caliber Decisions!
Reply #18 - Dec 22nd, 2025 at 11:37am
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Dellet wrote on Dec 22nd, 2025 at 6:13am:
Sounds like a 50-70 liner that was not rifled. The difference would be case length. 2 1/4” for the 32 gauge and 1 3/4” for the 50-70.

Seems like a reasonable conversion in the day. Same basic liner as the other 30,000, just no grooves cut.



Those dimensions are very close to the 50-70.  I have to agree that maybe the rifling just didn't get cut after the barrel was sleeved.   SO-- there is a simple solution;  send it off to a barrel smith and have it cut to match the 50-70 twist of the original conversions, then chamber for 50-70.   That is if you want it to be a rifle and not a scattergun.   There are several shops that can do the work and some have a pretty quick turn around time.

George
  
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Chris W
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Re: Caliber Decisions!
Reply #19 - Dec 22nd, 2025 at 3:19pm
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Who could do the rifling? There is no one I know of close to me.
  
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ssdave
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Re: Caliber Decisions!
Reply #20 - Dec 22nd, 2025 at 5:07pm
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JES reboring:  (You need to Login or Register to view media files and links)

Oregunsmithing:  (You need to Login or Register to view media files and links)
  
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