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weighing powder scales

 
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  #1  
Old 07-05-2004, 05:16 AM
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Join Date: Jul 2003
Location: Christchurch New Zealand
Posts: 39
weighing powder scales

I am looking for some reccomendations on what other people are using to weigh powder charges. I bought a Dillon Determinator scale but have found that I have to add a lot of powder to see it move on the scale read out. It also has an annoying tendency to drift on the zero.
I am weighing charges in the 7.0gn range and find that at a resolution of 0.1gn's I am getting too bigger error.
The bullet is a 240gn cast lead 44 at 1030fps (similar to a more streamlined bullet at 1000yds or so).
7.0+/-0.1gn will give me 0.6" vertical error at 100yds.
7.0+/-0.3gn will give me 2" vertical error at 100yds.
So far I have found at http://www.scalesgalore.com/oadventure.htm a Ohaus adventurer AR-1530 at $636US 0-150gm's x0.001gm's.
Suggestions please
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  #2  
Old 07-05-2004, 08:05 AM
Silver Member
 
Join Date: Dec 2003
Location: Texas
Posts: 110
Re: weighing powder scales

The determinator is , as you've seen, arguably the worst scale on the market today.

You can go to an RCBS 505 or 1010 and achieve
your desired result without spending alot of
money, if these are available in your area.

Accuracy tip for beam type scales;
Clean all surfaces with rubbing alcohol
prior to each use. The brass flag that
runs between the damping magnets, though non-ferrous, will pick up a surface charge and cause sluggish response. The alcohol evaporating removes this charge and you'll see increased accuracy in the weights.
Also use alcohol to clean the balance
pivots on a regular basis.
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  #3  
Old 07-05-2004, 08:16 AM
Gold Member
 
Join Date: Sep 2002
Location: Illinois
Posts: 836
Re: weighing powder scales

I have an older RCBS 304 scale made by Ohaus. It is listed as a pro lab quality scale. It has a double beam magnetic damper and reads from 1 to 1000 grains. Don't know if still available, but a very nice scale.
db
I was just on the web site you mentioned in your post and the Ohaus scale I have is still made and listed as the "Dial O Gram". I would highly recommend this model and not that bad a price.

[ 07-05-2004: Message edited by: dbhostler ]
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  #4  
Old 07-05-2004, 08:24 AM
Junior Member
 
Join Date: Jul 2004
Location: Dallas, TX
Posts: 4
Re: weighing powder scales

Can't beat the Prometheus for speed AND accuracy:
http://www.speedweigh.com/
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  #5  
Old 07-05-2004, 12:15 PM
Silver Member
 
Join Date: Jul 2003
Posts: 150
Re: weighing powder scales

hoodcounty, My 505 was really good when I first got it but lately if I weigh out 10 or 20 charges then reweigh them they can be bang on or + or - as much as .3grs ant ideas? [img]images/icons/confused.gif[/img]
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  #6  
Old 07-05-2004, 03:59 PM
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Join Date: Jun 2001
Location: Palmer, Alaska
Posts: 2,539
Re: weighing powder scales

Subsonic

I like that AR-1530 too. That's about the best one I've looked at, and has the capacity you need.
__________________
Brent Moffitt
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