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Thread: Powder consistancy

  1. #1
    Boolit Master
    Join Date
    Mar 2005
    Location
    Nine Mile Falls,Wa.
    Posts
    2,338

    Powder consistancy

    I have been experiencing some extreme spreads with Reloder 7
    That seems to be unusual. I am getting over 100 fps as an extreme spread with only 5 shots . Yesterday I got over 200 fps extreme spread on 1 string of 5. How can one tell if a powder has "gone bad " if it doesn't exhibit the usual warning signs of bad acrid smell or look rusty, etc.
    It's all chicken, even the beak!

  2. #2
    Boolit Master

    Winger Ed.'s Avatar
    Join Date
    May 2007
    Location
    Just outside Gun Barrel City, Texas
    Posts
    2,320
    We've all read about the 'gone bad' part.

    Something I wonder about is since we measure it by weight-
    Its made with a certain amount of moisture in the form of solvents that is figured into the load data that I'm sure uses new stuff.

    Over time, those solvents evaporate out, even though the old school metal cans.
    After a few years, I've thought that even if each little speck has the same energy-

    With less solvents, since we weigh a charge, the weight by volume will change.
    There will be a few more little granules in a charge weight of old powder than from a new can.

    Not enough extra granules to hurt ya,
    but maybe enough get a little velocity spread from using powder that has been opened awhile, or a few years old.
    Not much, sort of a 'batch to batch' difference, but with the same powder out of the same can.
    It wasn't playing the blame game, finding fault, and complaining about every little thing that made America great.
    It was God, guns, and guts.


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  3. #3
    Boolit Master
    Join Date
    Sep 2016
    Posts
    1,378
    I only load pistol, but, assuming the same components, set up, powder lot, etc., I've personally have had, and have read in other reloading forums about, greater than expected ES from powder clumping and bridging, and especially debris in the measure.

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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