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weighing powder scales

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  #1  
Unread 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  
    Unread 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  
    Unread 07-05-2004, 08:16 AM
    Gold Member
     
    Join Date: Sep 2002
    Location: Illinois
    Posts: 837
    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  
    Unread 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  
    Unread 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  
    Unread 07-05-2004, 03:59 PM
    Platinum Member
     
    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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