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Remington rolling block no 4 big chamber (Read 660 times)

jimmy Senior Forum Member Offline Now available in Oklahoma. Posts: 443 Location: Skiatook Joined: May 12^th, 2009	Re: Remington rolling block no 4 big chamber Reply #15 - Apr 14^th, 2026 at 7:46am	Print Post
	oneatatime wrote on Apr 13^th, 2026 at 11:48am: Jimmy, so the bulged case was a 32 Long Colt shot in a 32 S&W Long chamber? Yes, and the S&W chamber is slightly oversized. A 32-20 case will almost fully chamber and the base diameter is more than .01 bigger. Still going to make a cast.


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Dellet Frequent Elocutionist Offline Posts: 1265 Joined: May 19^th, 2017	Re: Remington rolling block no 4 big chamber Reply #16 - Apr 14^th, 2026 at 9:37am	Print Post
	jimmy wrote on Apr 14^th, 2026 at 7:46am: oneatatime wrote on Apr 13^th, 2026 at 11:48am: Jimmy, so the bulged case was a 32 Long Colt shot in a 32 S&W Long chamber? Yes, and the S&W chamber is slightly oversized. A 32-20 case will almost fully chamber and the base diameter is more than .01 bigger. Still going to make a cast. New or fired 32-20? Might make just enough difference if it was fired. Might also check 25-20 and 218 Bee headstamps if you have them. Often the base is a few thousandths smaller diameter. Double checked, I’m actually using 218 Bee. Base measures .346”
	« Last Edit: Apr 14^th, 2026 at 10:01am by Dellet »

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LRF Oldtimer Offline Posts: 700 Location: MN Joined: May 8^th, 2010	Re: Remington rolling block no 4 big chamber Reply #17 - Apr 14^th, 2026 at 3:25pm	Print Post
	marlinguy wrote on Apr 12^th, 2026 at 10:56am: If the bore is good you might look at having the chamber sleeved and then properly reamed back to the original chamber. As long as bubba didn't also make his new chambering too deep it will be the cheapest fix. I would second this idea


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jimmy Senior Forum Member Offline Now available in Oklahoma. Posts: 443 Location: Skiatook Joined: May 12^th, 2009	Re: Remington rolling block no 4 big chamber Reply #18 - Apr 14^th, 2026 at 8:16pm	Print Post
	Unfired 25-20 case in barrel alone is .009 from flush from the breechface.


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jimmy Senior Forum Member Offline Now available in Oklahoma. Posts: 443 Location: Skiatook Joined: May 12^th, 2009	Re: Remington rolling block no 4 big chamber Reply #19 - Apr 14^th, 2026 at 8:17pm	Print Post
	Same case in action isn't close so it is hanging up on the extractor.


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Dellet Frequent Elocutionist Offline Posts: 1265 Joined: May 19^th, 2017	Re: Remington rolling block no 4 big chamber Reply #20 - yesterday at 11:34am	Print Post
	Shouldn’t be too hard get some brass if you want to fire it before reworking the barrel. Turning a few thousandths off 25-20 base would be easy enough. 32 Colt New Police has a slightly larger base than 32 S&W, if you can find the actual brass. 32 H&R even 7.62 Nagant rimmed. Those would be a bit of improvement. I’d tell everyone it’s chambered in 30-15 Wesson, as in Frank Wesson. .342” base and .310” bullet. Probably priceless as it’s a very rare chambering. What is bore and groove diameters?


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