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Jul 28th, 2025
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Joined: Dec 2001
Posts: 3,971 Likes: 105
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 3,971 Likes: 105 |
As thick walled as those cases are I can’t see any practical way to resize them. Totally unlike drawn cases, which are very thin walled. You’ll be better off either getting new cases (look at the cases at Track of the Wolf) or turning them down—a very delicate lathe operation.
John McCain is my war hero.
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Joined: Jun 2008
Posts: 5,696 Likes: 226
Sidelock
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Sidelock
Joined: Jun 2008
Posts: 5,696 Likes: 226 |
YES, like Joe said and send the old cases to ME !!  Mike
USAF RET 1971-95 ![[Linked Image from jpgbox.com]](http://www.jpgbox.com/jpg/57865_80x60.jpg)
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Joined: Jun 2006
Posts: 3,251 Likes: 425
Sidelock
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Sidelock
Joined: Jun 2006
Posts: 3,251 Likes: 425 |
Maybe you’re looking at the wrong end of the hoss.
Out there doing it best I can.
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Joined: Mar 2002
Posts: 7,896 Likes: 653
Sidelock
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Sidelock
Joined: Mar 2002
Posts: 7,896 Likes: 653 |
Are your chambers in good shape? I see a lot of old guns with chambers which are tough as heck. If yours are rough polish them is a good first step.
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Joined: Mar 2015
Posts: 414 Likes: 54
Sidelock
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OP
Sidelock
Joined: Mar 2015
Posts: 414 Likes: 54 |
Are your chambers in good shape? I see a lot of old guns with chambers which are tough as heck. If yours are rough polish them is a good first step. The chambers are fine, it is a relatively new Spanish double, I have other new and used RMC hulls that fall out of the gun with no problems.. The problem appears to be that whomever I bought the hulls from used them in a shotgun with chambers that were not as tight as the chambers on my shotgun.
I have become addicted to English hammered shotguns to the detriment of my wallet.
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Joined: Jan 2018
Posts: 17 Likes: 1
Boxlock
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Boxlock
Joined: Jan 2018
Posts: 17 Likes: 1 |
What is the interior dimension of your 10-gauge chamber just above the rim? What is the diameter just above the rim of the existing fired cases that will fit? What is the diameter just above the rim of the fired cases that won't chamber? That would determine how many thousandths you would need to resize. SAAMI spec is here, page 19: https://saami.org/wp-content/upload...shell-2015-R2019-Approved-2019-04-23.pdfDiameter of 10-gauge 3.5" just above the rim is 0.854 - 0.009, meaning that your 0.846 is right about at the very smallest diameter possible. Not knowing the dimensions you're working with, If I were you I would try opening up the 0.846" hole to about 0.850" or 0.852" for the first inch or so and see if that takes care of the problem.
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Joined: Jul 2012
Posts: 4,959 Likes: 348
Sidelock
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Sidelock
Joined: Jul 2012
Posts: 4,959 Likes: 348 |
Are these cases turned from brass bar instead of drawn? if so my previous advice is wrong, bsteele's and/or John E's is correct. Turned cases act differently than drawn.
Mike
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Joined: Mar 2015
Posts: 414 Likes: 54
Sidelock
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OP
Sidelock
Joined: Mar 2015
Posts: 414 Likes: 54 |
Are these cases turned from brass bar instead of drawn? if so my previous advice is wrong, bsteele's and/or John E's is correct. Turned cases act differently than drawn.
Mike They aren't drawn like the Magtech brass hulls, they are CNC'd from bar stock.
I have become addicted to English hammered shotguns to the detriment of my wallet.
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Joined: Jun 2006
Posts: 3,251 Likes: 425
Sidelock
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Sidelock
Joined: Jun 2006
Posts: 3,251 Likes: 425 |
Build an online friendship.
Box them up and send them to someone here that can machine them for you.
Or sell them
Or reem the chamber
Having a set of progressive dies made, so that you can draw them to a slightly smaller diameter might be a fun project, but it’s not homeowner type stuff.
Out there doing it best I can.
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Joined: Feb 2009
Posts: 7,713 Likes: 346
Sidelock
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Sidelock
Joined: Feb 2009
Posts: 7,713 Likes: 346 |
....Or reem the chamber
Having a set of progressive dies made, so that you can draw them to a slightly smaller diameter might be a fun project, but it’s not homeowner type stuff. CZ, would you really consider altering a gun to fit someone elses used brass? If the brass only goes half way in the chamber, then it is likely the thinner wall that's hanging up. At the least, maybe put some calipers on the brass that work correctly, and the bulged brass, maybe do the sharpie low budget dykem, if the markings don't show without it. The expanded brass is probably not at the head, if similar brass can fully chamber, likely the thin wall would have expanded.
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