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Relining a Chamber only..? (Read 430 times)

RJ-35-40 Full Member Offline Posts: 241 Joined: Dec 7^th, 2016	Relining a Chamber only..? Jan 27^th, 2026 at 12:16pm	Print Post
	This may have been asked and answered in the past..? RE: 310 Martini Cadet. So can a 32 Winchester Special "Chamber" only be sleeved or modified to accept a liner that can then be chambered in 32-20 or some smaller cartridge like 32 S&W... or would the whole barrel need to be drilled and lined..?


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Otony Senior Forum Member Offline Posts: 285 Location: Bandon, Oregon Joined: Jun 5^th, 2021	Re: Relining a Chamber only..? Reply #1 - Jan 27^th, 2026 at 2:22pm	Print Post
	That would probably result in a long jump to the rifling. I think that works best when installing a chamber liner for the same cartridge or one that is very similar in overall length.

	Otony
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John Taylor Frequent Elocutionist Offline Posts: 1832 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: Relining a Chamber only..? Reply #2 - Jan 28^th, 2026 at 10:25am	Print Post
	Otony is right. The other problem is bullet diameter and bore size. The original groove size is about .318". The 32 Win. has a bullet size of .321" ( a little large for bore size ). The 32-20 uses a .312 "bullet which is a bit small and will not give good accuracy. Best to line the whole barrel or install a new barrel. (You need to *Login* or *Register* to view media files and links) T J's liners [email] TJsLiners1992@gmail.com/email]

	John Taylor Machinist/gunsmith
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RJ-35-40 Full Member Offline Posts: 241 Joined: Dec 7^th, 2016	Re: Relining a Chamber only..? Reply #3 - Jan 29^th, 2026 at 12:25pm	Print Post
	TONY and JOHN..!.. Thanks..! John Taylor wrote on Jan 28^th, 2026 at 10:25am: Otony is right. The other problem is bullet diameter and bore size. The original groove size is about .318". The 32 Win. has a bullet size of .321" ( a little large for bore size ). The 32-20 uses a .312 "bullet which is a bit small and will not give good accuracy. Best to line the whole barrel or install a new barrel. (You need to *Login* or *Register* to view media files and links) T J's liners [email] TJsLiners1992@gmail.com/email]


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bullshop Senior Forum Member Offline Posts: 268 Joined: Sep 14^th, 2017	Re: Relining a Chamber only..? Reply #4 - Jan 29^th, 2026 at 12:37pm	Print Post
	It seems to me that the most simple and cheapest solution is to use 32-20 brass and have a custom mold made to produce the diameter and weight bullet desired. Accurate molds would be the place to go.


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2152hq Participating Member Offline Posts: 25 Joined: Oct 18^th, 2024	Re: Relining a Chamber only..? Reply #5 - Jan 29^th, 2026 at 4:33pm	Print Post
	Size the 32 Win Spcl brass but do not expand it. The neck will remain the slightly smaller dia and .318 bullets will fit nicely into them. I load 8mm Mauser cal J bore with regular 8mm Mauser dies and do that and the .318 size bullets fit just right. Yes the neck of the brass will expand into the orig 32 Win Spcl chamber which is cut for the slightly larger dia .321 bullet.] But annealing the necks often and keeping the loads down will help keep brass life extended. Brass is easily obtained if not marked 32Spcl,,then reformed 30-30 is about everywhere. Full loadings in 32WinSpcl are not any fun in a Cadet. A light cast bullet load is much nicer on the shooter and the rifle. You can cast your own .318 bullets or some places have them for sale. Some J Bore 8mm Mauser shooters swage down the 32Spcl bullets and/or the cast .323 size 8mm bullets. Others just use them as is. They figure the jacket is a thin one on these projectiles made for the 32Spcl and the slight larger dia difference is not an issue. But then the Mauser and I think the GEW88 has quite a bit of extra strength over the Cadet. I sometimes use 8mm Nambu pistol cast bullets in reduced 8mm rifle loads. IIRC they are generally sold as .320d and 95 or 100gr RN. I don't resize these to .318. Just shoot them as-is. Several bullet casters offer them. Anyway, this would save a chamber liner, rechambering and with that, the issue of the extended bullet jump you would have using32-20. Just my thoughts..


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guilty gil Participating Member Offline Posts: 47 Location: Livingston mt. Joined: Feb 5^th, 2021	Re: Relining a Chamber only..? Reply #6 - Jan 29^th, 2026 at 10:12pm	Print Post
	I'm not positive about what is going on here, but if it would help i will give you a stock cadet barrel if you pay shjpping. I won't be home til middle of feb. Pretty sure i have at least one that is all original.. mick


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wesg Senior Forum Member Offline Posts: 328 Joined: Sep 13^th, 2004	Re: Relining a Chamber only..? Reply #7 - yesterday at 12:14am	Print Post
	All this... makes me more happy I've more or less bailed on antiques. A couple, still, maybe, I should pass on .... I still follow along, and drool over the amazing rifles y'all build. I wish I had the skill and patience. For me, barrel and chamber are just dimensions ... as are moulds ... but a fair bit more complicated than fitting a barrel. Any decent machinist or toolmaker can do that part of it. Die's ... ouch. Molds ... double ouch ...


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830singleshot Senior Forum Member Offline Posts: 479 Location: Texas Joined: Feb 11^th, 2007	Re: Relining a Chamber only..? Reply #8 - yesterday at 8:20am	Print Post
	wesg wrote yesterday at 12:14am: All this... makes me more happy I've more or less bailed on antiques. A couple, still, maybe, I should pass on .... I still follow along, and drool over the amazing rifles y'all build. I wish I had the skill and patience. For me, barrel and chamber are just dimensions ... as are moulds ... but a fair bit more complicated than fitting a barrel. Any decent machinist or toolmaker can do that part of it. Die's ... ouch. Molds ... double ouch ... It's the pursuit that makes it fun 😊

	J. Scott McCash&&New Braunfels, TX&&830-237-2376&&jsmccash@yahoo.com
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John Taylor Frequent Elocutionist Offline Posts: 1832 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: Relining a Chamber only..? Reply #9 - yesterday at 1:32pm	Print Post
	I put an octagon barrel on my Cadet, chambered for 32 S&W. Fun rifle to shoot and cost is low on reloading.

	John Taylor Machinist/gunsmith
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RJ-35-40 Full Member Offline Posts: 241 Joined: Dec 7^th, 2016	Re: Relining a Chamber only..? Reply #10 - yesterday at 4:14pm	Print Post
	Mick .... PM sent.... Bob guilty gil wrote on Jan 29^th, 2026 at 10:12pm: I'm not positive about what is going on here, but if it would help i will give you a stock cadet barrel if you pay shjpping. I won't be home til middle of feb. Pretty sure i have at least one that is all original.. mick


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RJ-35-40 Full Member Offline Posts: 241 Joined: Dec 7^th, 2016	Re: Relining a Chamber only..? Reply #11 - yesterday at 4:29pm	Print Post
	JOHN, Did you mount the front sling ..? Did you secure the front of the fore stock to the barrel..? TIA Bob John Taylor wrote yesterday at 1:32pm: I put an octagon barrel on my Cadet, chambered for 32 S&W. Fun rifle to shoot and cost is low on reloading.


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