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Thread: 45-70 supplies

  1. #21
    Boolit Buddy
    Join Date
    Jul 2012
    Location
    Canada, Ontario, Durham region
    Posts
    325
    This is the first thread I’ve read that mentioned a 45-70 actually holding 70 grains of BP.
    Everything I’ve read previously said less than 68 grains is the max in modern cases and thats with considerable compression.
    Bullet weight is not mentioned, maybe there using a lighter weight bullet less than 500 grs and seated out long, leaving room for more powder.

  2. #22
    Boolit Buddy tmanbuckhunter's Avatar
    Join Date
    Mar 2010
    Location
    Houston, TX
    Posts
    127
    Quote Originally Posted by greenjoytj View Post
    This is the first thread I’ve read that mentioned a 45-70 actually holding 70 grains of BP.
    Everything I’ve read previously said less than 68 grains is the max in modern cases and thats with considerable compression.
    Bullet weight is not mentioned, maybe there using a lighter weight bullet less than 500 grs and seated out long, leaving room for more powder.
    70grs will fit in a modern case, but you are right, it does require significant compression. I have loaded 70grs but accuracy was dismal. I find optimal performance with remington brass in the 63-65gr neighborhood, with the cases vibrated, or the powder run thru a drop tube.

  3. #23
    Boolit Master
    Join Date
    Dec 2008
    Posts
    1,717
    Quote Originally Posted by greenjoytj View Post
    This is the first thread I’ve read that mentioned a 45-70 actually holding 70 grains of BP.
    Everything I’ve read previously said less than 68 grains is the max in modern cases and thats with considerable compression.
    Bullet weight is not mentioned, maybe there using a lighter weight bullet less than 500 grs and seated out long, leaving room for more powder.
    It also depends on the bullet design. In my Shiloh I use 74 gr with a 530 grain bullet. The first three bands on the bullet are bore diameter so this gives a lot more room for powder.

    Chris.

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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