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Thread: Winchester WMR = Norma MRP?

  1. #1
    Boolit Master
    Join Date
    Sep 2013
    Location
    SW Washington near the MX track
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    619

    Winchester WMR = Norma MRP?

    I want to load up some surplus FMJ bullets for my 1895 Modelo Chileno 7x57. I see that these two powders are on the same line of my burn rate chart; are they interchangable?

    Considering starting out at 40 gns with the 174 gn FMJ.

  2. #2
    Boolit Master
    Join Date
    Jan 2011
    Location
    Prineville, Oregon
    Posts
    306
    According to QuickLoad, in that very mild load application these two powders are quite similar, essentially interchangeable (26 to 27k psi, a bit over 2000 fps velocity).

  3. #3
    Boolit Master
    Join Date
    Sep 2013
    Location
    SW Washington near the MX track
    Posts
    619
    Thanks!

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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