Uniflow Problems or User Problems?

Mickey the Dragon · Feb 23, 2014

I'm just starting to reload and I've currently got an RCBS Uniflow for measuring my powder. Unfortunately, I'm getting a lot of variation when trying to throw IMR 700-X, up to +/- 0.5 grains. I didn't have any issues with Winchester WST, but the 700-X is giving me fits. I've run 4-5 lbs of powder through it and wiped everything down with a used dryer sheet to try and remove any static electricity. Is there anything else that I should check? I'm trying to be as consistent as possible when manipulating the throwing arm.

eightshot627 · Feb 24, 2014

It's not the Uniflow or You. It's the powder. 700X is one of those powders that just doesn't meter well. I had the same problem with it in a Uniflow and a Dillion.

WST meters very well!

Walt

stu929 · Feb 24, 2014

I just picked up some 700X to try and while I didn't have the variation that you had I def did have some fluctuation.

I have noticed for the most part ball meters great from the Uniflow, Flake is ok but can occasionally drop a WTH charge and extruded pretty much sucks and can be all over the place. I prob don't bang out as many rounds as many because I weigh almost all charges. Partially because Im still working up loads but also because the things has been somewhat inconsistent. When possible if you have a powder that fits your application use ball powders they meter like a dream from the Uniflow in my experience.

Mickey the Dragon · Feb 24, 2014

Thanks for the feedback. I ran Bullseye through my uncle's Uniflow without much issue, but I guess the 700X is a bit more picky. I ended up just using the scoop and scale method for my test loads, so we'll see how those work out.

stu929 · Feb 24, 2014

If you have a trickle you can just meter a little low and trickle them up. Typically what I do on a powder that is less than cooperative.

byf43 · Mar 1, 2014

stu929 said:
If you have a trickle you can just meter a little low and trickle them up. Typically what I do on a powder that is less than cooperative.

^^^^This!!!!!!

Measure low. Trickle up to charge weight.

4MDGunRights · Mar 6, 2014

This is the method that I employ. I also record the Uniflow micrometer setting for the "just under" load in order to get back to that setting next time. You can reload quite quickly when you just have to trickle in the last 2/10s of a grain.

Uniflow Problems or User Problems?

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