Armory Sponsor
Posted: 8/6/2026 7:51:36 PM EDT
|
RCBS is pushing their latest version of the Uniflow Powder Measure. I posted a "where to find" about it here. They say this is the most accurate Uniflow ever. Has anyone done any actual comparisons of the three different versions of this powder measure? I have excellent results from my 1980-vintage original Uniflow, particularly after tuning it per dryflash3's instructions (I can't find that post at the moment...), so I'm wondering how "better" this latest measure can be. |
|
Here's the link, from the archives: Tuning a Uniflow powder measure |
Global Warming Hoax Skeptic before it was cool
Joined:
Jun 2007
Posts:
72969
EE: 100% (1)
WA, USA
|
That's an old thread and photowhore deleted most of the pics. Don't think it's any real use anymore. I looked at it last night and removed the toggle, so it will slip into the archives soon. Here is a post I put up on Dillon PMs last night; https://www.ar15.com/forums/Armory/Dillon-RL550-Help--Now-with-Dillon-PM-tuning/42-563306/?page=1&anc=6277446#i6277446 A Uniflo tunes the same way except you have no burrs to remove before waxing. |
Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other.
Shooting and Reloading, one hobby feeds the other.
I've used the paste wax (Johnson's) to polish the metal surfaces of the drum and barrel for my older Hornady powder measure. One thing that I feel made a difference in consistent drops was adding a baffle to the hopper just above the drum. Ebay has various baffles to fit Hornady, and RCBS Uniflow hoppers.
|
Joined:
Dec 2022
Posts:
1568
EE: 100% (42)
SC, USA
Global Warming Hoax Skeptic before it was cool
Joined:
Jun 2007
Posts:
72971
EE: 100% (1)
WA, USA
|
Originally Posted By smoothy8500: I've used the paste wax (Johnson's) to polish the metal surfaces of the drum and barrel for my older Hornady powder measure. One thing that I feel made a difference in consistent drops was adding a baffle to the hopper just above the drum. Ebay has various baffles to fit Hornady, and RCBS Uniflow hoppers. https://cdn11.bigcommerce.com/s-ymdhoricwq/images/stencil/1280x1280/products/380/747/rc_90225-powderbaffle__17573.1723481559.jpg?c=1 A Dillon PM, it's built in. |
Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other.
Shooting and Reloading, one hobby feeds the other.
|
The UPM III is not new. It has been out for several years. It is more like the hornady powder measure with dealing with the drum. I have had Uniflow since early 80's. Both drums. Served me well. I took DryFlash's input about waxing the drums and works slicker than snot on door knob. When things do not work. 99% of the time it is the operators fault. They do not read. And, some have no common sense! |
jme and I am a NRA Endowment Member
Don't be too timid and squeamish about your actions. All life is an experiment. The more experiments you make the better.
R W Emerson
Don't be too timid and squeamish about your actions. All life is an experiment. The more experiments you make the better.
R W Emerson
Global Warming Hoax Skeptic before it was cool
Joined:
Jun 2007
Posts:
72972
EE: 100% (1)
WA, USA
|
This applies to RCBS, Hornady, or Dillon PM's. Properly tuned with a baffle, these PM's will drop ball and flake powder Exact. Short cut extruded, Re-15, IMR-8208 XBR, will be + or - .1 gr. This assumes using proper technique; 1. Settling the powder after filling hopper with 5 taps on the side of the hopper with your finger. Some powders like Unique, will settle a half inch. Dropping 20-30 charges does the same thing, the taps just speeds up the process. 2. Use the same force speed on the PM handle every stroke. If you are not dropping exact charges, work on your technique. When setting PM, drop charge weigh. Make adjustment to PM. Drop 3 charges returning them to the hopper, then weigh the 4th. Those 3 charges are resettling the powder so you get an accurate measurement of the change you made. Once you think PM is adjusted, it should throw 3 charges in a roll to confirm setting. On a progressive press, all stations should be filled and charge weighed. (initial adjustment is with one primed case, powder dropped and adjustments made, then fill all stations) Lets say charge is light, trickle up the proper charge, make your adjustment. Return that case (with the corrected charge) to the press and cycle press. Measure next charge, make any needed adjustment needed, return case (with the corrected charge) to the press and cycle press. Repeat as needed. Adjustments should be slight, so no powder settling will be needed at this stage. Once you are dropping good charges, I personally check the next 3 or 4. If they are on, I start production. When you pause a progressive press, always do this with the press handle down. You always know where you are at this way. Do this for pausing to grab a drink, answer the phone, ect. Every 100 rounds when stopping to refill primers; 1. Visible check of powder level in hopper. 2. Take last charged case and check powder charge. Ya you have to raise the handle to do this. 3. Check case and bullet feeder for contents. |
Selling agent for Algores carbon credit scam.
Shooting and Reloading, one hobby feeds the other.
Shooting and Reloading, one hobby feeds the other.
Armory Sponsor