Problem with RCBS Uniflow powder measure

Sid · July 29, 2014, 07:08 PM

I have been using this measure for a long time without any problems. Now I do have a problem. On 2 occasions during the last month the hopper became loose from the main assembly while I was charging cases. Powder spilled all over the bench and floor and it was a mess cleaning it up. Looking at it, the hopper just seems like it is pressed into the main assembly. Both times I pushed it back in as hard as I could. Yet the problem recurred.

I was thinking of putting some Duco household cement on it, but would like to hear from others about what to do. For what it is worth, there has been no change in my technique which has remained the same for the last 50 years. I would be grateful for any advice. TIA

oakfloor · July 29, 2014, 08:35 PM

I would call RCBS, there customer service is 100% excellent, IMO

Gary L. Griffiths · July 29, 2014, 10:36 PM

I had the same problem. Put a thin layer of silicon sealant on the outside (only) of the bottom of the plexiglass hopper. Let stand overnight, and the problem should be permanently solved.

Oh, yeah, don't use any type of super glue or you'll likely "frost" the plexiglass.

Shootest · July 30, 2014, 09:51 AM

According to RCBS you are not supposed to cement the hopper on. You simply turn the entire unit (base and hopper held together) upside down and slam it against a hard wooden bench. It works well. There is a video but I don’t have the link.

burrhead · July 30, 2014, 01:14 PM

Try a wrap or two of Teflon tape on the outside base of the hopper and reassemble. It's not permanent or harmful.

Sid · August 1, 2014, 04:09 PM

I did what Shootest suggested. I held the measure upside down and slammed the hopper down on the workbench. It seems that this may have solved the problem. The hopper is now seated all the way down in the assembly and it appears to be a very tight fit.

pete2 · August 1, 2014, 05:55 PM

Call RCBS and get a new hopper. 've used one for 40+ years, no problem with looseness. Did replace one because it was etched on the inside. It fits real tight.

pete2 · August 1, 2014, 05:56 PM

Call RCBS and get a new hopper. I've used one for 40+ years, no problem with looseness. Did replace one because it was etched on the inside. It fits real tight.

g.willikers · August 2, 2014, 10:52 AM

I was going to suggest to drill, tap and screw the parts together.
But it sounds like brute force works just as well.

pete2 · August 2, 2014, 11:30 AM

Dillon uses screws, that will work.

July 29, 2014, 07:08 PM	#1
Sid Senior Member Join Date: November 22, 2009 Posts: 362	Problem with RCBS Uniflow powder measure I have been using this measure for a long time without any problems. Now I do have a problem. On 2 occasions during the last month the hopper became loose from the main assembly while I was charging cases. Powder spilled all over the bench and floor and it was a mess cleaning it up. Looking at it, the hopper just seems like it is pressed into the main assembly. Both times I pushed it back in as hard as I could. Yet the problem recurred. I was thinking of putting some Duco household cement on it, but would like to hear from others about what to do. For what it is worth, there has been no change in my technique which has remained the same for the last 50 years. I would be grateful for any advice. TIA

July 29, 2014, 10:36 PM	#3
Gary L. Griffiths Senior Member Join Date: April 8, 2000 Location: AZ, WA Posts: 1,469	I had the same problem. Put a thin layer of silicon sealant on the outside (only) of the bottom of the plexiglass hopper. Let stand overnight, and the problem should be permanently solved. Oh, yeah, don't use any type of super glue or you'll likely "frost" the plexiglass. __________________ Violence is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and valorous feeling which believes that nothing is worth violence is much worse. Those who have nothing for which they are willing to fight; nothing they care about more than their own craven apathy; are miserable creatures who have no chance of being free, unless made and kept so by the valor of those better than themselves. Gary L. Griffiths (Paraphrasing John Stuart Mill)

July 30, 2014, 01:14 PM	#5
burrhead Senior Member Join Date: July 7, 1999 Location: Chihuahuan desert, Texas Posts: 1,149	Try a wrap or two of Teflon tape on the outside base of the hopper and reassemble. It's not permanent or harmful. __________________ Join the GOA, SAF and the TSRA I'm offended by people that are easily offended.

July 29, 2014, 08:35 PM	#2
oakfloor Senior Member Join Date: December 10, 2009 Posts: 111	I would call RCBS, there customer service is 100% excellent, IMO

July 30, 2014, 09:51 AM	#4
Shootest Senior Member Join Date: February 9, 2011 Location: Just outside Cleveland, Ohio Posts: 722	According to RCBS you are not supposed to cement the hopper on. You simply turn the entire unit (base and hopper held together) upside down and slam it against a hard wooden bench. It works well. There is a video but I don’t have the link.

August 1, 2014, 04:09 PM	#6
Sid Senior Member Join Date: November 22, 2009 Posts: 362	I did what Shootest suggested. I held the measure upside down and slammed the hopper down on the workbench. It seems that this may have solved the problem. The hopper is now seated all the way down in the assembly and it appears to be a very tight fit.

August 1, 2014, 05:55 PM	#7
pete2 Senior Member Join Date: May 15, 2012 Location: Texas Posts: 2,613	Call RCBS and get a new hopper. 've used one for 40+ years, no problem with looseness. Did replace one because it was etched on the inside. It fits real tight.

August 1, 2014, 05:56 PM	#8
pete2 Senior Member Join Date: May 15, 2012 Location: Texas Posts: 2,613	Call RCBS and get a new hopper. I've used one for 40+ years, no problem with looseness. Did replace one because it was etched on the inside. It fits real tight.

August 2, 2014, 10:52 AM	#9
g.willikers Senior Member Join Date: September 28, 2008 Posts: 10,442	I was going to suggest to drill, tap and screw the parts together. But it sounds like brute force works just as well.

August 2, 2014, 11:30 AM	#10
pete2 Senior Member Join Date: May 15, 2012 Location: Texas Posts: 2,613	Dillon uses screws, that will work.