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Thread: BC Roundball Calculator

  1. 05-04-2023, 01:01 PM #1
    Lars-K
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    BC Roundball Calculator

    New calculator that will calculate the bc of a roundball bullet.
    You can find it here: https://weatherby.dk/BP/bc/BC.htm

    Click image for larger version.  Name: BC02.png  Views: 56  Size: 5.7 KB  ID: 313709
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  2. 05-04-2023, 08:16 PM #2
    ulav8r
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    Have bookmarked it. Are you going to make it available as a downloadable file?
    Spell check doesn't work in Chrome, so if something is spelled wrong, it's just a typo that I missed.
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  3. 05-05-2023, 12:22 AM #3
    TD1886
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    If you have a LabRadar chronograph it will give you the REAL TRUE BC at any distance. One of the neat things about that chrono.
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  4. 05-05-2023, 01:26 AM #4
    ulav8r
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    Just tried it again. This time it did not calculate the weight.
    Spell check doesn't work in Chrome, so if something is spelled wrong, it's just a typo that I missed.
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  5. 05-05-2023, 08:45 PM #5
    Lars-K
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    Works here. Remember to fill in values for diameter and weight. Using diameter 0.535 in and weight 230 grs gives the result of BC 0.0755
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  6. 05-05-2023, 08:47 PM #6
    Lars-K
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    @ulav8r I will convert it to a download file. Just need some spare time to get it done...
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  7. 05-05-2023, 09:28 PM #7
    megasupermagnum
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    Quote Originally Posted by TD1886 View Post
    If you have a LabRadar chronograph it will give you the REAL TRUE BC at any distance. One of the neat things about that chrono.
    A Labradar will not work with a patched round ball. It doesn't really work with any muzzleloader. Really a Labradar is good for modern handguns and rifles, and thats it, nothing else.
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  8. 05-05-2023, 09:29 PM #8
    megasupermagnum
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    Quote Originally Posted by ulav8r View Post
    Just tried it again. This time it did not calculate the weight.
    It couldn't do that since it doesn't know what alloy they are cast with.
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  9. 05-05-2023, 10:01 PM #9
    ulav8r
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    The first time I tried it, it calculated the weight after I put in the diameter. That would be of some use to me. If using a round ball, I could care less what the BC is. The only way I can see to alter the BC is to change the alloy and most alloy changes are not suitable for use in a round ball.
    Spell check doesn't work in Chrome, so if something is spelled wrong, it's just a typo that I missed.
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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