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Promo powder and bushing sizes

Discussion in 'Shooting Related Threads' started by GBatch_25, Jun 23, 2009.

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  1. GBatch_25

    GBatch_25 Active Member

    Apr 1, 2008
    I made a chart today of how much Promo powder each of my bushings throws. I did 10 drops and then took the average. Just passing the info along for those who might be curious. I realize each batch of powder can be different so these drops shouldn't be taken as gospel.

    Interesting observation is that the incremental amount between bushings is not close to being consistent.

    Grains Bushing size

    18.58 447

    18.66 450

    19.08 453

    19.30 456

    19.34 459

    19.75 462

    19.88 465

    20.21 468

    20.89 474

    Gene Batchelar
    Wheaton, IL
  2. nsrailroad

    nsrailroad Member

    Jan 29, 1998
    I'm still having alot of varibles on my mec with promo, but going to try some new things next week.
  3. RV4driver

    RV4driver TS Member

    Feb 14, 2009
    I just loaded my first Promo last night. Found .441 bushing gave me 18.2 very consistantly. Fortunately the previous owner of the press had machined this bushing himself, otherwise I would have had to test numerous bushings that I don't have!

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