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Thread: Trapdoor load

  1. #1
    Boolit Mold
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    Trapdoor load

    Looking at adding a Trapdoor to the mix. I've got a good load for my Sharps 45-70, it's a 535gr Postell by Montana Bullet and OE 1 1/2. Will that work to start out in the Trapdoor or do I need a lighter bullet? Thanks

  2. #2
    Boolit Master Nobade's Avatar
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    They have a 1:20 twist so lighter might be more accurate. Also very short throat so not much can stick out of the case. They work great with 457125 though, since it looks like the original 500.

  3. #3
    Boolit Master


    Walks's Avatar
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    I settled on the Lyman #457493 cast of 50/50 COWW/#2 over 34grs of IMR3031 quite awhile ago. Shoots very well out of a 1884 rifle and 2 different spaghetti Sharps.
    It's also the starting load in the Lyman handbook. I've also loaded 5744-28grs and IMR4198-34grs.
    My as cast weight is 416grs.
    I HATE auto-correct


    Happiness is a Warm GUN & more ammo to shoot in it.

    My Experience and My Opinion, are just that, Mine.

  4. #4
    Boolit Grand Master


    Larry Gibson's Avatar
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    You might find some useful information on loading for your TD in this thread;

    http://castboolits.gunloads.com/show...-and-Equipment
    Larry Gibson

    “Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.”
    ― Nikola Tesla

  5. #5
    Boolit Master
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    GONRA is just commenting from reading thru the decades - but use load LIGHT loads for yer trapdoor!
    If I had one - would only load MY OWN HANDLOADS ! Don't wanna get a KABOOM!

    (Younger son loads .45-70 for his MODERN production rifle. These would BLOW UP a trapdoor!)

  6. #6
    Boolit Master
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    The link Larry posted has some great info for TD loading.

  7. #7
    Boolit Mold
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    Thanks for the comments, shot it today with my Sharps loads only at 100 yds and it shot a 2" 5 shot group using the 520 gr Bear Creek bullet. I'm gonna order some 405's and try those. Fun to shoot. Buffington Sight is gonna be a steep learning curve.

  8. #8
    Boolit Master Nobade's Avatar
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    Glad to hear it works well. The sight and its use is well described in Loading and Shooting The Trapdoor book. It's worth getting a copy now that you own one of those rifles.

  9. #9
    Boolit Mold
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    Quote Originally Posted by Nobade View Post
    Glad to hear it works well. The sight and its use is well described in Loading and Shooting The Trapdoor book. It's worth getting a copy now that you own one of those rifles.
    Thanks, just ordered it.

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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