Speedluvn, you might check your other reloaded batches to make sure coals are correct. Just a sample from each batch should do. 
COAL
- Thread starter Speedluvn
- Start date
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Those Chinese calipers are notoriously unreliable. Get a one inch standard to check them with because sometimes they are only off a couple thou and it will still screw you up. I have found that sometimes, you can run the caliper from end to end and it somehow resets the electronics to where they should be. 
I have good Mitotoyo calipers and mics but I only use them infrequently as I shake so much I'm afraid I will drop them. Dropping a 9.99 Harbor Fright model is NBD.
I have good Mitotoyo calipers and mics but I only use them infrequently as I shake so much I'm afraid I will drop them. Dropping a 9.99 Harbor Fright model is NBD.
sinensis
Member
FWIW, i have the same calipers, and I noticed when the battery was almost, dead it started to do that. Once i replaced it with a fresh battery, the problem went away. Not sure if that was the cause, but it seemed to work for me.
Speedluvn
Active Member
Speedluvn, you might check your other reloaded batches to make sure coals are correct. Just a sample from each batch should do.
It was a confusing 24 hours cause my measurements “were off” but I couldn’t account for the inaccuracies. This answers all of my questions. I don’t know how the calipers lost their readings. The first things I checked was my other rounds.
It reminds me from the series “Air Disasters”. It’s show that explain how & why planes crash. Pilots can get fixated on their instruments but ignore other instruments that could have cleared up the discrepancy.
I’ve only had these calipers for a few months.
When I buy the HF calipers, I take my 1 inch standard along to make sure I get a good one. One time I went through 8 before I got one that was correct and repeatable. 
bawlmer
ALS Warrior
Speedluvn
Active Member
I can say that it was a confusing 24 hours or so but definitely a learning experience.
It's possible to inadvertently touch the zero button while opening the caliper, causing a short reading. Maybe that happened to you.
We all have brain farts occasionally, that's why it is always advisable to double and triple check ourselves when working with hazardous materials.
GuitarmanNick
Ultimate Member
Electronic calipers, scales etc..., Chinese or not, all work in basically the same way. When battery voltage drops below a certain level, they are not reliable.
Always zero the instrument before each use. If fluctuations in readings occur, replace the batteries to restore normal function.
To err is human. We have all had our moments.
Always zero the instrument before each use. If fluctuations in readings occur, replace the batteries to restore normal function.
To err is human. We have all had our moments.
Speedluvn
Active Member
I’m sure there are more to come.
I already learned the trick of zeroing the scale before each weighing with my Hornady digital scale.
DaemonAssassin
Why should we Free BSD?
I have a set of digital calipers that I use often, but if I question them int eh slightest, I pull out my analog dial calipers. May want to get a set of dial calipers, just to double check the digital ones.
- Feb 4, 2013
- 28,175
Speedluvn
Active Member
That’s what I was thinking.BUT, they are DIGITAL, therefore the number they show is RIGHT.
My father had an dial caliper that I have. I’m learning to use these new, to me, tools.
ironhead7544
Active Member
- Oct 27, 2018
- 188
When you buy new brass, run them through your small base die. And check them in your gauge.
Speedluvn
Active Member
What will this do.
- Feb 4, 2013
- 28,175
GuitarmanNick
Ultimate Member
The new brass is produced on different machines and will vary. If you want to insure the loads will chamber, always size new brass no matter who produced it!
I have some new 10mm brass I bought. It will be sized and gauged by me. I'm leaving nothing to chance. I have bought 300 aac brass that was "factory reformed, ready to load" and much of it would not gauge.
Yes, it should...
