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Thread: Primers -- Standard Large Rifle VS Large Pistol Magnum

  1. #1
    Boolit Master

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    Primers -- Standard Large Rifle VS Large Pistol Magnum

    I have an excess of large pistol magnum primers.
    How would these compare with standard large rifle primers in light cast loads.
    I am aware of the height difference.
    I am talking of loads in the 10 gr. of Unique range.
    Have you tried them?...dale

  2. #2
    Boolit Grand Master


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    Dale

    You don't mention which cartridge? A purview of posts #1, #14 and #16 in this thread may provide some insight into your question; http://castboolits.gunloads.com/show...-the-44-Magnum
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  3. #3
    Boolit Master

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    I plan on trying them in 30-30, 7.62X54r and 30-06 size cases.

  4. #4
    Boolit Grand Master


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    The LPPMs will work fine in those cartridges with cast bullet loads.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  5. #5
    Boolit Master

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    Thanks Larry.
    I was pretty sure they would be fine.
    I`m working with the bullets you sent me in the Mosin Nagant....dale

  6. #6
    Boolit Master



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    Waiting for the report
    Should do well

    Mike
    NRA Benefactor 2004 USAF RET 1971-95

  7. #7
    Boolit Grand Master


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    Quote Originally Posted by skeettx View Post
    Waiting for the report
    Should do well

    Mike
    Me too....!
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  8. #8
    Boolit Master
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    This is the opposite of what the OP is trying but I found it interesting.
    I wanted to use up some 215 Fed primers so I used a primer pocket tool to seat the 215 LR in .45 ACP cases. I used the same light load that I am loading in .45 ACP with a WSPM primer and run both rounds over the chrno and found the 215 LR primer showed about 50 FPS less than the WSPM primer. This was out of a 5" 1911.

  9. #9
    Boolit Grand Master


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    There is a wide variation in primer "strength" even with standard primers. Changing primers in small cases such as pistol cases can have a drastic effect on pressure if one is pushing max loads for the cartridge or firearm. In larger rifle cases (30-30 capacity and larger) with lower pressure cast bullet loads the difference is smaller because of the case volume. However it still must be accounted for. That's why "start low and work up" is always sage advise when making a component change such as primers. Here the chronograph is your best friend. Drop the charge a bit and work back up to the same velocity as the other primer gave.

    With the 30-30, 7.62x54R and 30-06 dale2242 is using the charge 10 gr Unique generates pretty low pressure even with the heavy bullets he is using. A tweak of the charge may be necessary for optimum accuracy though.
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

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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