Static build up in funnel & beam scale accuracy question

[Dr. Strangelove]

Hey all,

I've recently started getting static build up in the RCBS funnel I use to pour my weighed out loads of TR140 into the cases. I never used to have this problem, it's only a recent occurrence. I washed out the funnel with hot soapy water but to no effect.
Anyone had this before and found a solution?

I was also wondering which would be more accurate on a beam scale, or if indeed there would be a difference at all, when I'm measuring out exactly 40gr of TR140 using a Dillon 'Eliminator' (which is the same as an RCBS 5-0-5 but Dillon badged) - should I use the main scale and set the weight to 40gr with that, or set it to 30gr and the second scale to 10gr, or the first set at 30gr, the second at 9gr and the third at 1gr?

Answers much appreciated!

Regards,

Dr. S.

[John25]

Dr. S.

Technically, the only difference should be the time, and increased possibilty of physical error (ie knocking one of the weights out of slot)

The scales should measure the same. Unless you have a calibrated check weight it is difficult to make comparative measurements. (You could measure out two charges, one by each method, and check them against each other)

My recommendation would be to set the main weight at 40g. and the part grain to zero.

I bought a cheap set of electronic pocket scales, twenty quid I think, from Ebay, which came with a check weight, to confirm my charges. I double check every tenth charge on them.

As for the static, are you sure it's the funnel? It could be you; try grounding yourself on a radiator valve before and during your reloading session. - seriously. Synthetic carpets, nylon socks, pullovers etc. all pruduce a static charge which is stored in our bodies, it can go up to quite a large charge in volts. Or if you are prone to building up a charge, get one of those earthing bracelets.

http://www.electrostatics.net/articles/ ... people.htm

For this reason I shall be putting in a copper ground spike and grounding mat on my reloading bench when the new fettling shed gets built.

[The Cupcake Kid]

[Dr. Strangelove]

Thanks for that, John - I touched the radiator (with consent, of course) and there were no problems!

I'll try and borrow some check weights to see if either makes a difference to weighing accuracy.

[The Cupcake Kid]

The problem with static is that you can ground yourself to temporarily discharge the static on you but the charge will then start to build up again every time you move around, so unless you wear an earth strap like John has suggested and maybe use an anti-static mat on your reloading bench (which is conductive and also connected to a solid earth), you won't notice the static charge causing problems.

Static can act on all types of balances and cause mis-readings. Checking with calibration weights won't necessarily tell you that static is giving you false readings during a weighing session.

An anti-static spray helps to dissipate static on all surfaces and it only needs applying every now and then. A solution of fabric conditioner sprayed from an atomiser also works and it very effective on any carpets you may have in your reloading area. And it will then make it smell nice, as an added benefit!

[mikeb]

I had this exact same static issue. Get down ASDA and get some fabric tumble dryer anti static sheets, give everything including the funnel and machine a good wipe and problem solved. I was super sceptical but it worked a treat. Happens more in cold weather.

MikeyB

[whoowhoop]

Static may also be an issue if there is a pc in the same room.

[Dustyman]

I'm glad it's not just me then!! I was going to ask a similar question but shall try some of the suggestions offered and hope it sorts. Not wishing to hijack the post in any way but glad the question was asked I was about to go mad trying to chase the powder down the funnel with my finger , grrrrrrrrr ! Tank q , rgds Ian