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Thread: Weight or volume BP

  1. #1
    Boolit Mold
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    Jul 2017
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    Weight or volume BP

    I have shot muzzle loaders for many years and we always just use a measure for loads,in BPCR do you use a scale for it or just measure it by volume? Thanks

  2. #2
    Boolit Master
    Join Date
    Apr 2013
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    Scale ,cause there is the expectation of sameness/consistency shot to shot that will not happen with volume measure .

  3. #3
    Boolit Master

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    I have done both. I use a Belding and Mull powder measure to throw charges which is accurate as it is. For a big match or days I'm feeling fussy I also weigh charges, not just for the consistency but also to double check my technique using the measure.

  4. #4
    Boolit Master Don McDowell's Avatar
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    Weight.
    Volume can work with a good measure and technique, but as I long ago gave up making "partice ammo" I weigh out every round.
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  5. #5
    Boolit Master Murphy's Avatar
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    jj500,

    My suggestion is this. Set your scale up and weigh 10 charges measured by VOLUME and get an average weight.

    Many years ago, I took it that 90 grains of Pyrodex was 90 grains. I had zero experience with black powder or pyrodex. I weighed the charges on my scale set at 90 grains. Turns out, by volume they came in in the upper 130+ grains. Forgive me if you already know this as I do know know your level of experience, just sharing mine.

    Murphy
    If I should depart this life while defending those who cannot defend themselves, then I have died the most honorable of deaths. Marc R. Murphy '2006'.

  6. #6
    Boolit Master


    rfd's Avatar
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    always digitally weighed for cartridges, always volume thrown for muzzleloaders.

  7. #7
    Boolit Master
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    Once I have the powder column height needed/wanted/required I weigh that charge and set my measure accordingly.
    "In general, the art of government is to take as much money as possible from one class of citizens and give it to another class of citizens" Voltaire'

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  8. #8
    Boolit Master

    Wayne Smith's Avatar
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    There is absolutely no such measure as 'grains volume'! Black powder is always grains weight. Grains equivalent is volume.
    Wayne the Shrink

    There is no 'right' that requires me to work for you or you to work for me!

  9. #9
    Boolit Master
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    Quote Originally Posted by Wayne Smith View Post
    There is absolutely no such measure as 'grains volume'! Black powder is always grains weight. Grains equivalent is volume.
    Bless you!

    The grain is a unit of weight. Brands, grades, and lots of real gun powder vary such that a volume charge will vary among samples and sampling technique (throwing a volume charge) will vary too.

    prs

  10. #10
    Boolit Master
    Join Date
    Oct 2012
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    Scale most of the time.

    I will use volume when I am not being fussy, like with a patched ball muzzle loader or a plinking load.

    As noted above, DO NOT weigh BP substitutes unless you know the conversion from volume to weight. They are not the same as BP. I would hope 'everyone' knows this or at least reads the warnings on the powder containers.

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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