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Thread: 40-90 Sharps BN powders?

  1. 06-07-2023, 04:54 PM #1
    WCG
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    40-90 Sharps BN powders?

    Hi Guys,
    Newbie question.
    I have a Sharps in 40-90 BN (necked) and I have some .409" 398g bullets, but the only data I can find is for IMR4198, and that I cannot procure.
    I'm looking for about 1300 fps, which is some 150fps below max, so mild but not wimpy.
    Any advice on what powders would work and what to avoid
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  2. 06-07-2023, 05:28 PM #2
    steveu
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    1fg bp is what I use. What twist is the barrel?
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  3. 06-07-2023, 10:54 PM #3
    Red River Rick
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  4. 06-08-2023, 03:02 AM #4
    WCG
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    Sorry, should have specified nitro/smokeless powder.
    The rifle should handle smokeless as I believe it is only about 20 years old, been sitting new and unfired as nobody had the ammo
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  5. 06-08-2023, 03:15 PM #5
    steveu
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    Twist???
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  6. 06-08-2023, 05:40 PM #6
    beshears
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    40-70 Sharps Bottle Neck
    Powder 5744
    22.0 1350 fps
    22.5 1374
    23.0 1391
    25.4 1391
    Shorter case but might get you started
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  7. 06-09-2023, 09:02 AM #7
    WCG
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    Twist rate appears to be about 1:16.5"
    I'll give 5744 a try, do you get inconsistency with larger cases?
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  8. 06-10-2023, 11:08 AM #8
    steveu
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    That twist should handle the 400-420 bullets. Good luck with your project
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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