Made a trip to the local reloading store and he had a used (what looks like a Uniflow) RCBS measure and stand for $50. I grabbed it not knowing there is a large and small version. The large states 5-110 grains.

I am loading .45 and 9 so I was just checking to see if I can get it down to 3.0 gr., using HP-38 for the test, and had to turn the adjustment screw almost all the way in the get that. I checked about 10 throws and it was very accurate but I am guessing it is a large rotor since I had to screw it in so far but I don't really know.

Also, anything I should clean or check? It doesn't appear you can remove the hopper or it was very tight. Didn't want to break anything so I just left it alone.

You got a good deal on that. Probably want to look for the small drum and insert for handgun loading.

To remove the drum, loosen the nut on the threaded insert and unscrew it up into the powder hopper. The drum should then be able to slide out the side.

Sounds like you have the large rotor.I like the small one for pistol loads.If you're talking about removing the powder hopper,I think it's glued in.Ive never removed mine in 30 years.

While you're at it, consider getting the small "micrometer" style drum. It's much more flexible,repeatable and easy to adjust...perfect for handgun reloading.

I thought 9 out of 10 people had one.

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Good Deal and you got the good stand also!

The rotors come in and out as Novalty states.

DO NOT try and remove the powder hopper, there is not reason to and if you do you will probably crack it. Even if you do RCBS would send you a new one, but why bother.

I have the same one and the metering crew is just trial and error, I think the micrometer version is not much better, Waste of money I think. You still have to fiddle with it. It will get you close I guess.

There are also two (2) plastic tips one for small case mouths and another for larger

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Still Running Against the Wind

I never had much luck using a large cylinder for smaller handgun loads. Could never get a consistent throw. Midway sells small cylinders or see if you can trade a large for a small from someone.

Sweet find.........

Your life in reloading just got a whole lot easier.

Enjoy.

with the rest of us using a old Lyman 55

good find OP

That would of been a decent price if it were just the measure!
I've got the older kit that came with both drums. I played with the larger drum and didn't have the consistency with small gram throws that the small drum did. I added the baffle the OP's has and noticed the throws stay more consistent with a low powder level. I would adjust it full and then top up at half empty (or half full!). With the baffle the throws are good down to 3/4 empty.

You can add a micrometer adjustment to it & you definitely want the small pistol measure for handgun loads. I have one, but prefer my old rcns duo-measure. Found a new one on fleabay for when the one i have takes a krap.

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NRA Cert. Inst. IDPA CSO

Yes, I'm excited to find this and get away from hand measuring. Should speed things up a tad anyway. I'm afraid Christmas got in the way of my progressive purchase so this will have to do for now.

I see a small drum is about $35 bucks at Midway. I was just checking some 3.0 grain throws with HP-38 just for grins and I must say the large drum is very accurate so I may try it for now until I get the small cylinder. Maybe it's just that powder.

I watched the video on cleaning. Would NC brake cleaner be ok to use since I don't have RCBS die cleaner.

Thanks for the input and I won't try to remove the hopper.

Well upon further review it appears I have the small metering cylinder based on this from the Midway site.

Small Micrometer Adjustment Screw (Item# 322-221) fits RCBS Uniflow Powder Measure with a measuring cylinder with a 1/2" diameter metering chamber. This is the Uniflow Powder Measure where the Metering screw is removed out through the threaded area of the cylinder.

If there is no rust on the metering screw then there really is no need to clean anything. Just run some powder through it, get it coated with graphite and use it.

If I recall the outside of the drum is coated(blued) and the metering hole is just bored into the metal, You can take out the metering lock nut and the whole metering screw comes out. Look in the hole should be fine or a perhaps a light dusting of powder.

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Still Running Against the Wind

I was looking at the small chamber at Midway last night along with a micrometer screw.

Man I'm going to start perusing Craigslist and the other for some used deals.

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"He was kinda funny lookin'"

Checked it for you and the hole opposite the threaded side in my large drum is .685". Didn't want to break mine down so guessing the hole in the small drum is around .375" or so. Your set for pistol with the small drum.
Last night using my uniflow I finished 250 rounds of 9mm with HS-6 powder. Held consistent at 6.3 grains. You'll find they work great with ball powders.

Just took mine apart and the hole is .5" so looks like I definitely have the small.

Loaded my first batch of 50, 9mm with CFE last night at 5.0, 5.2 and 5.4gr and it metered great. What a difference over hand measuring! I can't believe I waited a year to get a measure. What am I going to do when go to an (unnamed) progressive.

The RCBS progressive uses the same powder measure

other brands use essentially the same type they are all pretty much the same.

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Still Running Against the Wind

Excellent buy! I've been using mine for about 40 years now. I've never removed the hopper.

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Detective Cobras Agents Oh My!

You can get a small rotor from RCBS, when I bought mine years ago it came with both.

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John

Good deal for $50 .

Like using a powder measure, you'll wonder why you've been wasting so much time.

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NRA Cert. Inst. IDPA CSO

Normally there will be no need to remove the hopper, but it can be removed and reattached or replaced if necessary. Instructions can be found on RCBSs site. It is pressed on, it is not glued on and it will not crack when it is removed. I have only had to remove it twice in the last 35 years.
The large adjustment screw must be removed through the hopper, but the small screw can be removed through the opposite end. That will indicate which drum and screw you have.

I have an RCBS Uniflow with both cylinders, and a micrometer chamber as well, and the RCBS is the one I use most. However I also have several other makes of measures, and several years ago I ran a test to see which was most accurate amond the RCBS, the Lyman 55 and a Belding and Mull measure. The Lyman turned out to be the most accurate among the three, but takes more time to get the three slides adjusted correctly. The B&M was so slow that I have never used it since the test.

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Tom
1560

I don't have any reason to remove it but if so nice to know it can be done. Just curious about it. Yes the adjustment screw comes out of the bottom not the hopper so it is the small drum.

Had to chuckle at this as I just finished decapping/sizing 500 cases last night and was thinking, each one of these pulls could be a completed round with a progressive.

Still glad I picked up the Uniflow for this price as I imagine it will be handy working up small test loads loads. Doubt if it will go to waste.

If you are referring to aerosol automotive brake parts cleaner, it will etch your hopper and leave it looking frosted on the inside, preventing you from seeing the powder level.

Ed

I load on a 550 & 650 & still use my ss press & Duo-measure for small jobs where I don't want to setup the progressive.

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NRA Cert. Inst. IDPA CSO

I have two uniflows, one came with my Rockchucker kit and the other was my Dad's and it's 50 years old. The newer one I set up with the pistol drum and the older is for rifle. I also have my Dad's stand. They both work great.

You might want to look into getting a baffle or making one it's not that hard or expensive.

It actually came with a baffle. So far, after testing several powders, this on has been spot on.

Mine also came with the large & small drums. One of the best reloading investments was the small micrometer, it threw smaller 2-3 grain loads (with the small drum) much more accurately & consistently but also handled all my rifle charges as well. Off the top of my head I can't recall the max wt it will handle, but I've had no problem with powder wt's for calibers from 223,25-06,270wsm,375Win, 7mm08,308, etc. Unless you are shooting a real big powder charge you may be good to go with the small alone. The big thing was the calibration #'s (if recorded) allowed you to repeat powder charges between calibers with much less fine tuning, there is almost always some, but nowhere near as much. Good luck & happy motoring. OH, DO NOT LUBE/OIL ANYTHING (near powder), it can make a real mess. +1 leave the hopper alone, it doesn't need anything other than a baffle, & don't overtighten things.