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CFE 9mm major


Rolex

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3 hours ago, Rolex said:

  it went from 7.2gr to 6.9 or to 7.4.

 

VERY difficult to measure a single powder charge of 7 grains (1/1,000th of a pound),

on most scales we use for reloading.    :ph34r:

 

Just as possible that you are Not getting the variation in powder throws that you

think you're getting -   You Might be getting the variation in trying to measure

1/10th of a grain (1/10,000th of a pound).

 

A draft, or static cling or a bunch of other things could account for the tiny

differences in measured weight.

 

The BEST way to find if you're throwing consistent charges is accuracy - fire

a 12 - 15 shot group at 25 yards with iron sights or 50 yards with a dot - and

see how accurate your load is.   If it's accurate enough for you, don't worry

about 6.9 or 7.4 - just practice, practice, practice.    :) 

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Dillon's powder measures are not the most consistent in the world.  I've found that operating the press erratically causes variations.  I used the following procedure when I was loading on a Dillon.  Be consistent in operation.  Same movement and same pressure every time.  When you have 5 or 6 consistent operations, stop and measure the powder in the case.  Repeat another 5 or 6 and measure again.  Your variation should be no more than 0.1gr.  If it is, you have something wrong with the press.

 

I insist on accurate drops, because I want SDs in the single digits for all my competition loads.

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  • 4 months later...
On 5/14/2017 at 6:29 AM, Rolex said:

I was checking each charge and finding it went from 7.2gr to 6.9 or to 7.4.

 

On Dillon 650.

I am dialed in at 7.1 grains steady on my 650.  I have checked every 10th round for the first 100 and its nuts on.  Now, when I let it sit and start for a day and start reloading again, I get a 7.4 grains, so I always dump the first couple and check again to confirm I am dropping the right amount

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