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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
 

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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
 

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

Best...mike
 

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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
 

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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
 

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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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