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Posted: 3/29/2009 11:28:42 AM EDT
Maybe a stupid question but I'm curious.

Why is there a small hole in the cap of my Dillon powder hopper? I can only speculate that it's either so the contents can breathe (can't imagine why it needs to). Or, it's there to prevent a vacuum to form by decreasing volumes of powder and consequently affecting the way the powder falls into the powder bar.

Anybody know for sure?
Link Posted: 3/29/2009 12:02:28 PM EDT
You have it figured out.
Link Posted: 3/29/2009 12:24:24 PM EDT
It's a vent hole, to prevent pressure build up and too help prevent stuck cases.
Link Posted: 3/29/2009 3:12:45 PM EDT

Originally Posted By brentwal:
It's a vent hole, to prevent pressure build up and too help prevent stuck cases.

OK, I'll bite. How could the vent hole in the powder measure possibly prevent stuck cases in the decapping / resizing die?? If you mean a stuck straight wall case in a powder through expander die, the cause of that is something else rather than a pressure build up in the powder measure.

Some times the answers people come up with here baffle me.
Link Posted: 3/29/2009 3:23:06 PM EDT
Originally Posted By brentwal:
It's a vent hole, to prevent pressure build up and too help prevent stuck cases.


WTF are you talking about? Some reloading sizer dies have a vent hole for lube to escape, but THAT DOES NOT PREVENT STUCK CASES!!!!

Link Posted: 3/29/2009 3:28:59 PM EDT
[Last Edit: 3/29/2009 6:18:53 PM EDT by AR15newbe]
Originally Posted By Marine-78:
Maybe a stupid question but I'm curious.

Why is there a small hole in the cap of my Dillon powder hopper? I can only speculate that it's either so the contents can breathe (can't imagine why it needs to). Or, it's there to prevent a vacuum to form by decreasing volumes of powder and consequently affecting the way the powder falls into the powder bar.

Anybody know for sure?


To prevent negative air pressure in the hopper?
Link Posted: 3/29/2009 4:46:20 PM EDT
I always thought that the hole was for the powdercheck system?!? I always tape the hole over with Al duct tape...

skink
Link Posted: 3/29/2009 4:53:51 PM EDT
I'm not that familiar with Dillon equipmet, but don't they have a low powder warning system? I would think a rod would go through said hole.

What the hell would be the point of having it there for a vent? I don't believe they would spend the time and materials to create a air-tight seal on their hopper just to drill a hole in it.
Link Posted: 3/29/2009 5:34:45 PM EDT
No such thing as stupid questions, answers are another story. It is for the low powder sensor.

Not a bad investment if you are rocking and rolling but not really paying any attention to the volume left in the measure. But then again it may help to pay attention if you're reloading
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