RCBS Uniflow minimum


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lee n. field
October 12, 2003, 08:08 PM
Is there a minimum charge of powder that you can throw from an RCBS Uniflow powder measure?

I feel like I'm bottoming out when I measure out small-ish handgun loads (3.7 gr Bullseye for .38 Special).

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Standing Wolf
October 12, 2003, 09:39 PM
I had the same problem with that measure and Bullseye. I'm less unhappy with the Lee measure that uses disks, but it's still hard to get consistency smaller than plus or minus a tenth of a grain. I think it's a powder that wants to be weighed charge by charge—which I'm not willing to do.

lee n. field
October 12, 2003, 11:06 PM
Any suggestions on an alternative that will measure out small ammounts through a Uniflow? The smallest cartridge I'm likely to reload is .380 Auto.

What I mean by bottoming out, BTW, is that the powder measure will bind, in such a way that it feels like the adjustment screw is too far down.

I'm not wedded in any way to Bullseye, just got about half a pound left to work through.

CMcDermott
October 13, 2003, 06:30 PM
Are you sure you are using the pistol drum etc. instead of the rifle? My Uniflow on my PRO 2000 press came with both sizes of drums and inserts. I have used the pistol drum to meter as small as 1.8 grains of Titegroup for 32 Mag wadcutter loads, which it did +- .1 grain. I regularly loaded 45 ACP with 3.8 grains of Titegroup for my Bullseye shooting and 5.0 grains of Titegroup in a 41 magnum for Cowboy shooting and it metered these loads very well indeed(+.1 -0 grain).

lee n. field
October 13, 2003, 07:59 PM
Are you sure you are using the pistol drum etc. instead of the rifle? My Uniflow on my PRO 2000 press came with both sizes of drums and inserts.

Nope, I'm not. I called RCBS customer service today, and they told me about using the smaller adjustment screw. They're sending one along.

dickwholliday
October 13, 2003, 08:38 PM
i helped a bro get started loading the other day.....i looked in his new uniflow and saw the large size meter and was concerned that it might not work with the Unique powder he bought....i read somewhere in the instructions that RCBS has redesigned the metering screw (it is sort of convex shaped on the new ones rather than flat like they used to be)....we used the Unique and it was very consistent when thrown through the new uniflow......Dick

Standing Wolf
October 13, 2003, 09:39 PM
Are you sure you are using the pistol drum etc. instead of the rifle?

I switched to the smaller unit early on, but it still wasn't much use. I'm not married to Bullseye, you understand, but after working up ideal loads for five .357 magnums and two .44 magnums, I'm reluctant to switch to a smoother-metering powder and start all over.

lee n. field
October 17, 2003, 08:50 AM
Happy Camper-hood approaches. I received the small screw and rotor from RCBS yesterday. I'll need to pick up some more primers this weekend, then see how well it works. :)

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