ASSRA Forum - Primer pocket swaging

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Primer pocket swaging (Read 11524 times)

KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Primer pocket swaging Oct 13^th, 2019 at 11:22am	Print Post
	Forgive if this has been discussed, I could not find what i am looking for by searching. How does a press mounted swage work for reducing primer pocket depth so a small pistol primer can be used in place of a large one? Does it "mash" the web down? If I could see a drawing or picture of one I am sure I would be able to make one up. The RCBS swage sets I see are for removing military staked crimps right....or do they make a version to modify the pocket depth? Their web page does not explain. regards kw


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beltfed Frequent Elocutionist Offline Posts: 1826 Location: Central Wi Joined: Dec 20^th, 2007	Re: Primer pocket swaging Reply #1 - Oct 13^th, 2019 at 1:26pm	Print Post
	I believe the "simple" swages can reduce Depth of primer pocket. But NOT reduce diameter of pocket from Large to Small. That would take some large displacement of brass. There have been Shims made to reduce diameter from large to small diameter pocket. beltfed/arnie


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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Primer pocket swaging Reply #2 - Oct 13^th, 2019 at 1:38pm	Print Post
	The RCBS swage only deals with the crimp found in military ammo. Never heard of trying to swage a large pocket down to a small. I doubt it can be done. There's too much metal to be moved. I have converted Berdan-primer 7.5x55 Swiss brass to take small rifle primers by machining the crown off the fired primer, drilling through the anvil to make a new flash hole, and then swaging the shank of the Berdan primer against the walls of the pocket using the RCBS swage tool. This works. I can't say I've reloaded any of the 40 cases I modded more than twice, but in none of them did the sleeve formed by the old primer shank come loose.

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gunlaker Frequent Elocutionist Offline Posts: 2612 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: Primer pocket swaging Reply #3 - Oct 13^th, 2019 at 1:42pm	Print Post
	Meacham used to sell a setup for swaging large rifle primer pockets to large pistol, but that's the only similar thing I've heard of. Chris.


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KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Re: Primer pocket swaging Reply #4 - Oct 13^th, 2019 at 1:46pm	Print Post
	I made a big typo.....want to go from large rifle to large pistol. Will look at the Meacham design if still av available. I would like to make one though since the machinery is sitting here. kw


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KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Re: Primer pocket swaging Reply #5 - Oct 13^th, 2019 at 1:49pm	Print Post
	The Meacham web page does not show a swage for ref.


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gunlaker Frequent Elocutionist Offline Posts: 2612 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: Primer pocket swaging Reply #6 - Oct 13^th, 2019 at 1:58pm	Print Post
	KFW wrote on Oct 13^th, 2019 at 1:49pm: The Meacham web page does not show a swage for ref. Yeah they took it down some time ago. I would have liked to have had one. Chris.


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JerryH Frequent Elocutionist Offline ASSRA Member #10876 Posts: 1328 Location: Easton, CA Joined: Nov 9^th, 2014	Re: Primer pocket swaging Reply #7 - Oct 13^th, 2019 at 2:34pm	Print Post
	Kermitool, the maker of Hoke sights, used to make the tool you're asking about. I'm not sure if he still does or not. I have one of these and will take some pictures later today and post them along with the instruction sheet. I can supply measurements also if desired. JerryH

	I'm not a complete idiot, some of my parts are missing.
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Cbashooter Frequent Elocutionist Offline Posts: 1634 Location: Eastern Wa. Joined: Mar 31^st, 2018	Re: Primer pocket swaging Reply #8 - Oct 13^th, 2019 at 3:07pm	Print Post
	KFW wrote on Oct 13^th, 2019 at 1:46pm: I made a big typo.....want to go from large rifle to large pistol. Will look at the Meacham design if still av available. I would like to make one though since the machinery is sitting here. kw I shoot large pistol in my cast bullet guns all the time they ignite just fine in the LR pockets


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Primer pocket swaging Reply #9 - Oct 13^th, 2019 at 3:21pm	Print Post
	KFW PM sent.

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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KFW Oldtimer Offline Posts: 634 Location: Wyoming Joined: Dec 18^th, 2016	Re: Primer pocket swaging Reply #10 - Oct 13^th, 2019 at 3:48pm	Print Post
	Jerry h seems several of us are curious, if you could post some pic's, or dimensions I will try to make one up this week. thank you KW


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Hiwall55 Senior Forum Member Offline Posts: 468 Location: west central Illinois Joined: Jun 30^th, 2012	Re: Primer pocket swaging Reply #11 - Oct 13^th, 2019 at 5:30pm	Print Post
	I had Kermit make me one of those years ago, you can use the RCBS to swage it back to Lg Rifle. If you shoot LP in a LR pocket it comes back .013 and will eventually damage your breech block.


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Primer pocket swaging Reply #12 - Oct 13^th, 2019 at 5:44pm	Print Post
	You can also just use a primer pocket uniforming tool to get it back to Large Rifle primer depth. CBA the issue really has nothing to do with ignition but destroying the breech block face. The difference in depth and approximately 10 thousands from large rifle to large pistol causes the hammering and destruction to the breech block face by the large pistol primers moving back. I have seen more than one breech block destroyed from extended use. (You need to *Login* or *Register* to view media files and links)

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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JerryH Frequent Elocutionist Offline ASSRA Member #10876 Posts: 1328 Location: Easton, CA Joined: Nov 9^th, 2014	Re: Primer pocket swaging Reply #13 - Oct 13^th, 2019 at 6:54pm	Print Post
	Die body : 3.500 long stepped down/threaded portion 1.175 long, threaded 7/8 – 14 inside of body treaded 1/2 - 20 .750 deep at top of body body OD .960 & ID .530 except for threaded portion at top of die body Stem: 4.5 long threaded portion 1.540 long, threaded ½ – 20 smooth plunger portion tapers from .365 to .330 & then steps down for another .150 to .200 OD (this was ordered for a .38 caliber but it works fine on .40 & .45 caliber cases also) the hole in the end is a tight, sliding fit to the .078 pin on the shell holder part Shell holder/pin: basically an RCBS shell holder with two Allen screws to hold the .078 pin in place with a .200 OD by .100 high extension Hopefully that will help. If you need something more let me know. JerryH
	« Last Edit: Oct 13^th, 2019 at 7:01pm by JerryH »
	I'm not a complete idiot, some of my parts are missing.
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beltfed Frequent Elocutionist Offline Posts: 1826 Location: Central Wi Joined: Dec 20^th, 2007	Re: Primer pocket swaging Reply #14 - Oct 13^th, 2019 at 8:59pm	Print Post
	Some of us BP freaks use a heavy card wad in the primer pocket, cut in as the primer is seated to help make up the difference in LP vs LR primer height. So far no breechblock set back or "dent" in a lot of rounds shot thru my orig HiWall 40-65 or my Ruger No 1 40-72 beltfed/arnie


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