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Thread: Speed guesstimate

  1. #1
    Boolit Mold
    Join Date
    Oct 2021
    Posts
    10

    Speed guesstimate

    I have two very accurate loads out of my Super Blackhawk Hunter with 7.5in barrel.

    240 Swc with 8.0 grains of Win 231
    255 Keith bullet with 18.0 of 2400

    Can anyone tell me what speed they should be going?


    Sent from my iPhone using Tapatalk

  2. #2
    Boolit Buddy
    Join Date
    Mar 2008
    Posts
    195
    I would guess the 8/231 would just over 1000fps, and the 18/2400 around 1300fps.
    BigBoreShooter

  3. #3
    Boolit Buddy



    doghawg's Avatar
    Join Date
    Dec 2005
    Location
    Wisconsin
    Posts
    425
    ^^ Ditto what Big Bore said. My 7 1/2" FA averages 1292 fps with 18 gr. of 2400 under a Lyman 429244 and Winchester 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