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Thread: Lyman 439186 370 gr to 458-460 ?

  1. #1
    Boolit Master brstevns's Avatar
    Join Date
    Oct 2007
    Near St. Louis MO

    Lyman 439186 370 gr to 458-460 ?

    Has anyone tried PP the Lyman 439186 370 gr. bullet up tp .458-460 diameter for use in a 45/70 ? Have a Ruger number 1 in 45/70 and was wondering if it might work.

  2. #2
    Boolit Master
    Join Date
    Dec 2016
    I have taken that bullet up to .447 to use in a .43 Mauser, but never thought about going any bigger. I won't cost much to find out, just two more wraps of paper! Perhaps you could wet wrap the first patch then when dry add a second dry patch to bring it too .460? There is a thread by HABCAN about patching a 309 up to 338 that is very interesting, so I'll be watching that one also. Let us know how it works for you.

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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