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Thread: 3F for .45-70 BP PPB

  1. 09-20-2025, 10:14 AM #1
    JosieGun
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    3F for .45-70 BP PPB

    I've always used Swiss 1-1/2F, and sometimes 2F, for my bore rider cartridge loads.

    Any concerns with using Swiss 3F for a BP PPB bore rider load? Either full case or reduced using a wad stack?
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  2. 09-20-2025, 12:52 PM #2
    JSnover
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    I haven't had any trouble but I've heard it can cause hard fouling ahead of the chamber. I imagine wiping between shots would take care of that.
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  3. 09-20-2025, 05:14 PM #3
    country gent
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    Compression may be different and velocities higher
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  4. 09-20-2025, 10:33 PM #4
    Gobeyond
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    I checked the pressure for a 500 grain on a uk internal ballistics calculator. Should be ok, it is for my gun.
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  5. 09-21-2025, 07:06 AM #5
    JosieGun
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    Quote Originally Posted by country gent View Post
    Compression may be different and velocities higher
    Yep, that'd be a given for both. I noticed both when compressing 3F for .44 magnum BP PPB bore riders.

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  6. 10-11-2025, 03:55 PM #6
    Gobeyond
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    https://www.p-max.uk/cgi-bin/black_powder.cgi
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  7. 10-11-2025, 08:30 PM #7
    earlmck
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    Quote Originally Posted by Gobeyond View Post
    https://www.p-max.uk/cgi-bin/black_powder.cgi
    Thanks for that link: it was real close to calling my actual velocity I get out of the old trapdoor 45/70. And in my case FFFG would appear to boost pressures enough for a small enough gain that I wouldn't do it. (Not that I was planning on trying, but good to know...)
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  8. 10-12-2025, 12:04 AM #8
    Gobeyond
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    Maybe try smokeless…
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  9. 10-12-2025, 12:08 AM #9
    Gobeyond
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    https://www.p-max.uk/cgi-bin/pressure.cgi
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  10. 10-12-2025, 06:16 AM #10
    JosieGun
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    Quote Originally Posted by Gobeyond View Post
    https://www.p-max.uk/cgi-bin/black_powder.cgi
    THAT is too cool, thanx for sharing.
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  11. 12-16-2025, 10:43 AM #11
    Gobeyond
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    Quote Originally Posted by earlmck View Post
    Thanks for that link: it was real close to calling my actual velocity I get out of the old trapdoor 45/70. And in my case FFFG would appear to boost pressures enough for a small enough gain that I wouldn't do it. (Not that I was planning on trying, but good to know...)
    Yeah small gain, high pressure.
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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