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Powder Density

Discussion in 'Shooting Related Threads' started by skeeljc, Nov 16, 2012.

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  1. skeeljc

    skeeljc Supporting Vendor Supporting Vendor

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    Life (reloading) would be a lot easier if the powder manufacturers would publish the density of their powders. That way you could calculate the exact bushing size needed to drop the required charge.

    Jim Skeel<BR>P/W Dealer/Distributor
     
  2. School Teacher

    School Teacher Well-Known Member

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    I find it easier to alter bushings with a rat tail file to increase capacity and painting the inside with fingernail polish to reduce capacity. I use MEC bushings which are easily available and inexpensive.

    Powder density varies from lot to lot, some powders like Promo vary a lot.
    As a result, I weigh my charges at the beginning of each reloading session.

    Even with an accurate density chart, your desired charge weight would IMO would not always result in a specific bushing size.

    Don't trust a mathematical calculation to determine charge weight. Use a scale.

    I used to use an adjustable charge bar in my MEC loaders but, as the late Pat Ireland recommended, I have more confidence in altered bushings.

    Ed Ward
     
  3. Border Bandit

    Border Bandit Well-Known Member

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    Jim I saw a chart, here, I think; but wouldn't burn rate give some indication?

    Best...mike
     
  4. Bob_K

    Bob_K Well-Known Member

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    I have a pdf file with powder densities for 152 powders. PM an email address and I'll send it on.
     
  5. wayneo

    wayneo Active Member

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    Here is a chart that shows densities. NOTE, #44 WSF is backward on the chart.

    Wayne
     
  6. ImpalaBob

    ImpalaBob Member

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    Spoiled with my adjustable MEC charge bar!

    Why not drill and tap a bushing side hole and use a "precision-adjustment" set screw for adjusting a bushing volume? http://www.mcmaster.com/#set-screws/=k7aufe
     
  7. goatskin

    goatskin TS Member

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  8. Ahab

    Ahab Well-Known Member

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    Errr ... ahhh ... ahmm ....

    why not go by this chart that Whiz White has set up on his site?


    http://www.swsupply.com/downloads/BushingChart.pdf
     
  9. willing

    willing Member

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    You guys who file bushings what do you do with Promo which can change every can???
    Bill
     
  10. School Teacher

    School Teacher Well-Known Member

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    Bill:

    I don't reload Promo. Due to wide variations in Promo density, I would be tempted to use my adjustable charge bar. I reload Green Dot, Red Dot, E3 and Herco which have small variations from time to time. For these, I either file away a little more metal of paint some of the inside of the bushing with fingernail polish.

    If I did reload Promo, I would try to buy 4 8# containers from the same lot at a time as it should be consistent within the same lot. Still, I always weigh the powder charge when I begin a reloading session. I drop several charges before I weigh 3 charges. I use a Pacific balance beam scale so I simply eyeball the weight readings.

    Ed Ward
     
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