Arredondo Powder Drop Slide with Micrometer

Eliminate galling with Vectan SP2!


If you use Vectan SP2 or other super fine grained powders, you know how the powder can leak around the powder bar and even jam the Dillon powder bar. The Arredondo Accessories plastic Powder Drop Slide has been proven to cure this problem.

We have arranged with Arredondo Accessories to carry their Powder Drop Slide with our Micrometer Powder Bar Kit™ preinstalled. You get all of the advantages of the Arredondo Powder Drop Slide PLUS our Micrometer Powder Bar Kit™!

Need super small powder drops? These powder drop slides are customized, exclusively for UniqueTek, to allow even smaller powder drops than the standard Arredondo Powder Drop Slide. They will meter down to 0.7 grians (with Win 231) and they meter very small powder drops more accurately than the Dillon extra-small powder bar. If you are loading small centerfire cartridges like the .32 S&W Long for ISSF Center Fire Pistol and other target competition, this is THE powder bar to use!

• Prevents galling with Vectan SP2
• Super small powder drop ... as low as 0.7 grain (with Win 231)
• Micrometer Powder Bar Kit is preinstalled

FREE Calibration Curve Spread Sheet
To download a copy of the Calibration Curve spread sheet in the Microsoft Excel .xltx format, just Click Here. If you need a copy for an old version of Excel (.xlt format), please send me an email and I'll be happy to send it to you.
Calibration Curve
(Click on chart to view larger)
As with our Micrometer Powder Bar Kit™, we provide a FREE Excel spread sheet you can use to generate "calibration curves" for each of your gunpowders. The "calibration curve," enables you to predict the micrometer setting to yield any desired charge weight for that gunpowder.*
* You still must weigh and confirm all powder weight setting changes even when using a calibration curve that you have generated yourself.

"The best money I've ever spend on reloading equipment! It totally eliminates the tedious work of setting the powder bar to a different load." — Mark D. - Hoboken, Belgium

"All in all, I'd say that your micrometer in combination with the Arredondo plastic powder drop slide is an extremely accurate, and user friendly combination." — Bob N. - Sag Harbor, NY

"You can't imagine how happy I am now, that Ive found a powder bar that can handle loads around 1.0 grs for our .32 S&W target loads (AND has a micrometer adjustment, too)." — Paul K. - Altendorf, Switzerland

ORDERING NOTES: Due to the different orientations of the powder measure on the various Dillon presses, the powder drop slide is available with the micrometer installed in one of two orientations.
• Left side of powder bar — For RL 550B or Super 1050
• Right side of powder bar — For XL 650 or Square Deal B
Although the micrometer index marks will read upside down on the XL 650 or Square Deal B, this orientation provides better visibility of the micrometer and easier powder weight adjustment. Please select the correct index mark orientation from the pop-up menu. If you do not make a selection, you will be sent the version for the RL 550B/Super 1050 presses.

Micrometer Powder Bar Kit is a trademark of UniqueTek, Inc.

Order Information

Item Number



Dillon Press Model
Select the version for the model Dillon press you have.


  • Eliminates Galling with Vectan SP2
  • Min. Powder Drop = 0.7 gn
    (with Win 231)
  • Max. Powder Drop = 15 gn
    (with Win 231)
  • Fits the Dillon Auto Powder Measure


Thimble Size

0.5 inch diameter thimble

Thread Pitch

40 thread per inch
(replaces the 28 thread per inch bolt)


.001" per division
(equivalent to .02 grains Win 231)

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