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Thread: Trapdoor carbine bullet mould

  1. #1
    Boolit Mold
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    Trapdoor carbine bullet mould

    I have what my wife says is a "gun porn" addiction and well I did it again and found another Trapdoor carbine . The other one I have shoots the .459/405 Lee bullet ok . But when slugging the bore on the new one it shows .462-.463 best that I can tell . What would anyone suggest for a new bullet mould . I shot it with the .459 and it was not real good .

  2. #2
    Boolit Master
    13Echo's Avatar
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    I’d try Buffalo Arms. They have a really good selection of moulds and will help with advice if you call

  3. #3
    Boolit Buddy
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    You might try powder coating that boolit to increase dia. I did that to lee 340 and it works good in my Uberti Sharps and Trapdoor.

  4. #4
    Boolit Master brstevns's Avatar
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    Might have to Paper Patch for that Trapdoor

  5. #5
    Boolit Grand Master



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    Tom will make you whatever size you want. He makes outstanding molds. http://www.accuratemolds.com/
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  6. #6
    Boolit Mold
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    I checked Accurate out and they did have a mold for $200 but are out , they make a great mold , most of the molds I have are Lees which are quite a bit cheaper . You get what you pay for but hope can find something cheaper . May have to go that route . As far as paper patch can you do that with a hollow base bullet , somebody else said try powder coating to increase the diameter . I have played with different loads , 2f , 3f and even tried some smokeless to see if it would help but just can't find the sweet spot . That's why thought about going with a bigger bullet .

  7. #7
    Boolit Grand Master



    M-Tecs's Avatar
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    Single cavities from Accurate are $76 singles and $90.50 for a double.
    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

  8. #8
    Boolit Mold
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    Sorry shortlegs missed your post . Were you having the same issues with your trapdoor ? I started out with 55gr and Lees 405gr and have tried going up and down with powder charge , compression . What was yours slugged out to ?

  9. #9
    Boolit Mold
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    M-tecs big thanks on the correction I don't know what I was looking at on their website but will be rechecking for sure .

  10. #10
    Boolit Master
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    Another vote for Tom at Accurate Molds. I run a couple of his molds for my Trapdoor and they work great.
    Protecting this country and it's communities isn't just the job of soldiers and police, but of every patriot who is capable.

  11. #11
    Boolit Buddy
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    You will have to have a bullet that fits, however you get there. There is a smidgeon of truth to the old adage that soft lead will "bump up to fit" with black powder but if you want accuracy the same "groove + .002" holds true.
    As I see it the least expensive route would be a sizing die to size the bullet you have to correct diameter before paper patching. Next would be a correct mold from Accurate et al, UNLESS you find a mold close enough in diameter to beagle it.
    Yes, you can PP hollow base. I have Paper Monies.

    From my experience with black powder in .45-70 I am thinking you may need more than 55 grains of powder, unless your charge is filling the case to bullet base plus enough to give a bit of compression when the bullet is seated.
    Good luck! I am envious of your project!

  12. #12
    Boolit Grand Master


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    Quote Originally Posted by soonerfan66 View Post
    I have what my wife says is a "gun porn" addiction and well I did it again and found another Trapdoor carbine . The other one I have shoots the .459/405 Lee bullet ok . But when slugging the bore on the new one it shows .462-.463 best that I can tell . What would anyone suggest for a new bullet mould . I shot it with the .459 and it was not real good .
    Are you sizing those Lee's? Is your mould the 459-405-HB?

    My Lee mould with a 16-1 alloy (used with BP loads) drop at .462 - .464. With COWW + 2& mixed 50/50 with lead they also drop that large. I use those with smokeless powder loads. If your bullets drop that large just use them "as cast".
    Larry Gibson

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

  13. #13
    Boolit Mold
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    I casted a few bullets with some tin mixed in and it did increase the diameter a bit but still not sure what I needed so the next thing will try is the powder coating method which can't do for a few days . If that don't get me there will get a Accurate mold . I sent them a email asking which one would be closest to what I need . Not quite sure what all the letters mean and want to be sure . Correct me if I am wrong if slugging the bore shows .462-.463 I will need about mold .464 ? . I see they got 405gr bullets but need to find out which one is hollow based . If anyone has ordered a mold from them like what I need please speak up .

  14. #14
    Boolit Grand Master

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    If your bullet is small by a couple thousandths there is the process of lapping to enlarge it. You could take it up .002-.003 pretty easily. Just remark / ID it so you know. I would re stamp size under mould number. this way if you have 2 of the same you know at a glance which is which.

    One other thing to try before lapping would be to post in swapping selling for some test bullets at the desired dia and try them first to see if they improve accuracy.This gives you an idea if its whats needed and also what size to lapp too.

  15. #15
    Boolit Mold
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    I have tried to track down someone who sells 405gr - .462-464 bullets but had no luck . Not sure about lapping the mold I got cause my first Trapdoor shoots it good and not sure if it would shoot the same afterwords then would need to replace it . The biggest reason I don't want to do it is I never have done anything like that . Sometimes you can second guess yourself to death .

  16. #16
    Boolit Buddy
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    The rifle should work fine with the undersize bullet, if it is the hollowbase version. It was designed that way. It does require using an alloy without any antimony so the lead will be more pliable. Black powder will expand it better but smokeless will also work. I have shot many thousands of rounds out of my 1884 and it consistently would put 8 or 9 of 10 into 5" at 200 yards. The other one or 2 would open groups to 6"-8". That is with issue sights,trigger and original .464 dia. bore. I would recommend reading Spence Wolf's book, " Loading Cartridges for the Original 45/70 Springfield". It is cheaper than buying another mold and you will learn a lot, although it is a somewhat tedious read.
    I followed every instruction, including enlarging flash holes, Magnum primers, 2FG powder, bullet alloy, lube, correct dies, compression,etc.
    In the nearly 30 years since first reading that book I have read a lot of "Poo-pahing" of processes he came up with but they were based on the original processes and the ODG's did some impressive shooting back in the day.
    My favorite plinking load was the later black powder carbine load with the deep seated bullet. I found that it shot better if the case was left unsized. Groups ran 2"-3" at 100 yards and were very pleasant to shoot in an infantry rifle.
    My mold is the NEI version, which I don't know if it is still made. The Lee is 405 HB is very similar, Spence Wolf was responsible for both of those companies coming out with those molds.
    Good luck and good shooting,
    Dennis

  17. #17
    Boolit Master RU shooter's Avatar
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    There's also the "beagling " method of shimming the mould blocks with some foil tape can easily pick up 2-3 thou in dia.
    If you find yourself in a fair fight, your tactics suck!

  18. #18
    Boolit Grand Master


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    Quote Originally Posted by soonerfan66 View Post
    ........ Correct me if I am wrong if slugging the bore shows .462-.463 I will need about mold .464 ? . I see they got 405gr bullets but need to find out which one is hollow based . If anyone has ordered a mold from them like what I need please speak up .........
    No, you will not need .464" bullets if your TDs bore if your measurements is .462 - .463. If your bullets drop out of the mould at .462+ you are good to go. TDs have little to no throat so a larger bullet isn't needed. My bullets are only .0005 larger than the groove diameter of my TD. I also shoot another bullet that is .001 under groove diameter with very good accuracy and no leading.

    The Lee 459-405-HB while called a hollow based bullet is not a true hollow base. Spence Wolf designed that bullet for Lee and it is a replica of the M1873 bullet. The hollow base is actually called a "dish" and is there only to control the weight of the bullet with a given external dimension. It is not there to function as a Mine' style HB.

    I suggest you cast some bullets and hand lube them w/o sizing and test fire them. Are you using BP or smokeless loads?

    You might also find my posts in this thread informative; 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

  19. #19
    Boolit Mold
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    Read your older post Larry sounds like you really did your homework , I need to take some time and go back and reread it and write down some notes . The mold I have is the Lee .459/405gr hollow bottom , didn't size them , usually stay with black powder with older black powder firearm but I did try a smokeless load when it seemed everything else was failing , have tried with and without using a drop tube , was using pure lead but did add some tin to the mix close to 1-20 but haven't loaded any up yet , and size did increase a bit about .460 . I was going for 1-16 but when got done redid my math and seen was off a little , if I do make it 1-16 will the size increase some more?

  20. #20
    Boolit Mold
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    Whats your thoughts on hollow bottom or flat bottom ? You may of said something on this subject but all the info I have read lately my head is starting to spin .

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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