What bullet w/ BP?

Discussion in 'Blackpowder' started by JPIMBO, Jan 21, 2022.

  1. JPIMBO

    JPIMBO Member

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    I have a 43 Mauser 1871 I want to shoot bp in. What bullet do I shoot. It has .454 grooves and .433 lands. Do I need to fill the barrel with the bullet? Or can I shoot .446. Hawk bullets because they are jacketed.
    It’s a special problem to be sure. I could PP but to what diameter? Or sell the gun. It’s a m1871 barreled action with custom stock and set triggers. 25 inch barrel, pristine bore in very good shape. Professionally done hunter or stalking rifle and antique.

    I really just want to know what to shoot in it.
     
  2. Big Bore 44

    Big Bore 44 Member

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    Wikipedia says it takes a .446 dia. cast lead bullet of 370 grains weight. The rifle is not made for jacketed slugs and they might not be very good for the bore.
     
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  3. JPIMBO

    JPIMBO Member

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    That’s the groove of the 71/84. This seems like it’s different technically speaking. With my groove that bullet would gas cut.
     
  4. noelf2

    noelf2 Member

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  5. Jackrabbit1957

    Jackrabbit1957 Member

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    Might be worth trying a.452 pistol bullet, my trapdoor likes a 255 grain .452 much better than the .405 gr standard ,458 plus it don't beat ya to death.
     
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  6. J-Bar

    J-Bar Member

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    Google 43 Mauser or 11x60 Mauser and you get lots of stuff.

    Midway lists a Lyman mold for the bullet. Presently out of stock, but someone may have one for sale. It gives you something to look for, if you cast your own:

    https://www.midwayusa.com/product/1010244253?pid=705018
     
  7. JPIMBO

    JPIMBO Member

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    I appreciate the info about bullets that fill the bore, but how do you push them into the case. I’ve never had a PP bullet that didn’t bunch up on top of case. I used a .439 bullet, 2 wraps of .0025 paper.
     
  8. JPIMBO

    JPIMBO Member

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    I thought of using a .452 plated bullet. Soft lead. But won’t .433 lands distort it badly?
     
  9. JPIMBO

    JPIMBO Member

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    What will happen. It will have .010 engraving on either side. Will the pressure rise.
     
  10. hawg

    hawg Member

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    Don't use soft lead in it and don't use jacketed bullets. Soft lead will strip through the rifling and lead your bore up fast.
     
  11. Big Bore 44

    Big Bore 44 Member

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    Soft lead will obturate and fill the grooves. If you wish to go the PP route, bell the case mouth a bit more than you normally would. One of the first rifles I loaded for was a 44-40. Grandpa taught me that soft lead was best for BP loads. Properly lubed = no leading.
     
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  12. hawg

    hawg Member

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    At 1,430 FPS soft lead will most certainly strip through the rifling.
     
  13. JPIMBO

    JPIMBO Member

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    How soft is too soft? I was hoping for 9- 12.
     
  14. Big Bore 44

    Big Bore 44 Member

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    9-12 brinell would probably be fine. If the accuracy isn't there try softer.
     
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  15. hawg

    hawg Member

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    You might get by with a BHN of 12 but 17 would be better. Try it and see.
     
  16. JPIMBO

    JPIMBO Member

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    if hardball is 15 what would be 17?
     
  17. hawg

    hawg Member

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    90% lead, 8% antimony, 2% tin.
     
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