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Thread: BP Compresssing tool

  1. #1
    Boolit Buddy
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    BP Compresssing tool

    Would a .41 inch punch be wide enough to compress BP in a .45-70 case?

  2. #2
    Boolit Grand Master

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    With a heavy wad like the 060 thick harder materials it should be okay, with thinner lighter wads it may allow the edges to fold up around it. .410 is roughly 050 small or .025 on a side.7/16 or .440 would be better. The head on a 3/8 allen head cap screw might be very close to what you want a little work with it clamped in a drill and file could take it to just what you want. Another to check would be a 1/4" flat heads head dia.

  3. #3
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    I just saw a Lyman M die in .41 cal for ten bucks and wondered if I could use it to compress BP using a press. I guess I’ll pass on it. Thanks for your input.

  4. #4
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    Just thinking. If I went with a cap screw or a flat head, I could chuck it in my drill press and adjust it for the same depth each time. That should work shouldn’t it?

  5. #5
    Boolit Grand Master

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    You might be able to lock a washer between 2 nuts for a stop on the case mouth if the nut will fit inside the case mouth. Depending on the compression it may be hard on a drill press rack and pinion/spindle. Off the top of my head a 1/4" nut is 7/16" across the flats so it might just go. If the nuts are big enough 2 nuts jammed in location would do it. compress to the nut just touches and your there.

  6. #6
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    Chill Wills's Avatar
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    $20 gets you one, a good one at that, that you can install in a die body you have now.
    Here is a link....

    https://www.buffaloarms.com/reloadin...-body-van45rcp
    Chill Wills

  7. #7
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    Quote Originally Posted by GregLaROCHE View Post
    Just thinking. If I went with a cap screw or a flat head, I could chuck it in my drill press and adjust it for the same depth each time. That should work shouldn’t it?
    This is one of those deals if you gonna do it - do it right! I dont reckon a drill press would be accurate enough and the compression stem needs to be fairly neat in the case and straight every stroke - If you really need to save some bucks can buy bolts with the thread to fit your RCBS die body (I believe they 9/16th NF) but then you need a lathe to turn the shank. I would make one myself - I have the lathe and if I scratch around in my workshop for a bit the bolt will be there someplace - but to save twenty bucks ??? ................................not really

  8. #8
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    indian joe is correct - do it right. just get the proper BACO plug and stick in a lyman "M" die body and be done with it.

  9. #9
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    I have now cut a good fitting tool of my own but when I started out, I just bought a 7/8" 14tpi bolt to thread into my press and used a .38 Special case with a black line on it to compress the powder.
    Worked fine and cost a grand total of $2.50

  10. #10
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    Will Buffalo Arm’s compression die fit into any other than a Lyman M die. I’m using a tablet and all of Buffalo Arm’s pages get cut off at the right so I can’t read everything.

    I called them about the pages being cut and apparently nothing can be done about it.

  11. #11
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    Quote Originally Posted by GregLaROCHE View Post
    Will Buffalo Arm’s compression die fit into any other than a Lyman M die. I’m using a tablet and all of Buffalo Arm’s pages get cut off at the right so I can’t read everything.

    I called them about the pages being cut and apparently nothing can be done about it.
    yes, it's die specific, it's all on the BACO site .... which has Horrible navigation.

  12. #12
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    Quote Originally Posted by rfd View Post
    yes, it's die specific, it's all on the BACO site .... which has Horrible navigation.
    So that means I need to pickup the Lyman M die I saw for ten bucks to put it in. It won’t work in any other die like a Lee Universal Expander die. I don’t have any Lyman M dies at this time.

  13. #13
    Boolit Master

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    Quote Originally Posted by GregLaROCHE View Post
    So that means I need to pickup the Lyman M die I saw for ten bucks to put it in. It won’t work in any other die like a Lee Universal Expander die. I don’t have any Lyman M dies at this time.
    what i meant is that BACO offers their various caliber compression plugs for various manufacturer expander die bodies - lyman, rcbs, redding. if you already have one of those expander die bodies, buy the appropriate plug to fit that body.

  14. #14
    Boolit Grand Master Don McDowell's Avatar
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    Track of the Wolf sells compression plugs specifically built for Lee dies.
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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