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Thread: Improvised Ammunition: Small Pistol Primers in Large Rifle Primer Cases.

  1. #1
    Boolit Master Mauser 98K's Avatar
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    Aug 2017
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    Improvised Ammunition: Small Pistol Primers in Large Rifle Primer Cases.

    lets go ahead and get the legal crapola out of the way..

    this is for educational purposes only. if you attempt the herein information then you agree to be bound by the terms outlined below. if you do not agree then do not attempt. you do so at your own risk.

    me (the author), and castboolits, and all people associated with listed and unlisted shall not be held liable for any damages incurred by trying the herein contained information. any damages, death, injury, disfiguration, loss of limb or bodily functions, or destruction of property is the sole responsibility of the person or persons who try the information set forth in this video.. any damages or injuries incurred, listed or unlisted, shall be the sole responsibility of whomever decides to try the contain information. by going forward with using this information you agree to be bound by said terms above.

    ok. down to business.. https://www.youtube.com/watch?v=q8KmWCTWCEo

    now we get to the fun stuff of improvisation.. this is a tutorial (sort of), on how to use small pistol primers in large rifle cases. this information is for a emergency situation only, like if you cannot get large rifle primers anymore (like in a post collapse environment) and should not be the sole means of priming cartridges. with this system, if you can find any type of ammo or component then you can make ammo for your rifle. your rifle may or may not be able to set off this primer adaptation, so it is best to test one b4 putting powder in the case or trying a lot. it is also worth noting that in some rare cases the primer does stick out just a hair when seated. this may or may not cause problems with semi automatic rifles or bolt guns with super tight head space..

    the military bolt actions, especially the Mauser, has no problems with this. i have even done this in my SKS with good results.. it even set off the H414 spherical ball powder .308 load that i made... but i use this method a lot in my cast bullet loads using pistol powder and have never had a malfunction.

    im not sure how it changes the pressures, if it does at all, but as always, start at the lowest setting of published data and work up.. always follow the instructions in the manuals.

  2. #2
    Boolit Master
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    Hah! Nifty idea!

  3. #3
    Boolit Master
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    Hope I never has to do this, but certainly worth remembering.

  4. #4
    Boolit Master uscra112's Avatar
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    There's been for converting Berdan primed milsurp ammo to take a small rifle primer for some years now. But in that method the entire top of the old primer is drilled away, and the remaining ring swaged in place with the same tool used to remove the crimp from 5.56 milsurp. The Berdan anvil is drilled out with a #49 drill to create a central flash hole. Now a small rifle primer is a perfect fit. Would the same thing work for Large boxer ammo? I would think so. I do it with 7.5x55 Swiss ammo, but haven't ever thought to try it with boxer ammo. More work to begin with, and it really needs a small lathe to do properly, but once done the cases can be treated like any other boxer primed case. My batch has been reloaded half a dozen times now, and the ring is still in place
    So long, and thanks for all the fish.

  5. #5
    Boolit Man Went2kck's Avatar
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    Good information for the times of need when their isn't any to be had.

  6. #6
    Boolit Master Texas by God's Avatar
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    I tried it and it worked.
    Thanks Mauser98K.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  7. #7
    Boolit Bub JoeJames's Avatar
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    May 2018
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    Just don't ever, ever do that backwards - ie., rifle primers in cases that are intended for some other type primer than those which use rifle primers. Bad no, no. Don't even think about it. I will not mention what kind of cases do not use rifle primers.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check