,bluehorse wrote:Be wary of electronic scales . I have had a bad experience with varying readings and similar . Myelectonics sit in the rubbish pile . And I prefer to use tried and true mechanical balance type . even though the flat bottom pans can give inaccurate readings . Answer is to put a dome in centre of pan using a ball pein hammer of suitable size and try again . lol
My electronics were intermittent without a pattern to bad readings . So Beware !!
bluehorse wrote: the flat bottom pans can give inaccurate readings . Answer is to put a dome in centre of pan using a ball pein hammer of suitable size and try again .
bluehorse wrote:Be wary of electronic scales . I have had a bad experience with varying readings and similar . Myelectonics sit in the rubbish pile . And I prefer to use tried and true mechanical balance type . even though the flat bottom pans can give inaccurate readings . Answer is to put a dome in centre of pan using a ball pein hammer of suitable size and try again . lol
My electronics were intermittent without a pattern to bad readings . So Beware !!
straightshooter wrote:bluehorse wrote:Be wary of electronic scales . I have had a bad experience with varying readings and similar . Myelectonics sit in the rubbish pile . And I prefer to use tried and true mechanical balance type . even though the flat bottom pans can give inaccurate readings . Answer is to put a dome in centre of pan using a ball pein hammer of suitable size and try again . lol
My electronics were intermittent without a pattern to bad readings . So Beware !!
I can guarantee that a ubiquitous mobile phone was nearby.
Every now and then your mobile will transmit a strong "I am here" signal to a mobile phone tower.
If your electronic scale is inadequately screened against the RF signal then your current reading and possibly subsequent readings will be upset and be in error.
Both my Dillon scale and my Lyman dispenser get affected if a mobile is switched on nearby and will require the cal 0 button to be pressed.
I do a cal 0 every tenth round when reloading anyway.
Simple answer is to make sure all nearby mobile phones are switched off when using an electronic scale.
Oldbloke wrote:" noticed my GemPro250 was giving me odd numbers a few times but I worked out the huge tesla battery and invertor mounted on the other side of the cavity wall (about 600mm away) was probably making its life difficult. Keep the scale away from all electrical stuff if you can."
Its the EMF that causes the problem. You may find that a simple reflector or Faraday cage will fix it.
https://en.m.wikipedia.org/wiki/Electro ... _shielding
OR simply putting more distance between the battery and the scales.
straightshooter wrote:By the way a little realism is beneficial when considering variability due to powder weight. Consider a typical Palma load of 47 grains and a variation of 0.1 grain. That is a variation of about 0.2% which is negligible when all the other variables in firing a cartridge are taken into consideration.
Vince24 wrote:In my case the reason why I weight every powder charge is NOT that I think that 0.1gr will make a difference on the group.
It's just that I don't trust my Lee Perfect powder measure .
This thing will beautifully throw the exact powder charge at 0.1gr five times in a row and then... be off by 0.7gr on the next one.
So I prefer to check the weight systematically.
And if I detect a 0.1gr deviation, well, if I have spotted it, I am too perfectionist not to correct it!
Anyway, overall, I would do a very good review for that Frankford scale. Mine does the job!
Lazarus wrote:Vince24 wrote:In my case the reason why I weight every powder charge is NOT that I think that 0.1gr will make a difference on the group.
It's just that I don't trust my Lee Perfect powder measure .
This thing will beautifully throw the exact powder charge at 0.1gr five times in a row and then... be off by 0.7gr on the next one.
So I prefer to check the weight systematically.
And if I detect a 0.1gr deviation, well, if I have spotted it, I am too perfectionist not to correct it!
Anyway, overall, I would do a very good review for that Frankford scale. Mine does the job!
The only time I've noticed mine getting squirrelly is when it needs recharging.
I don't have a powder thrower so I hand weigh every charge.
I calibrate every time I start and push the tare button every time I put the pan back on the scale.
Oldbloke wrote:Lazarus wrote:Vince24 wrote:In my case the reason why I weight every powder charge is NOT that I think that 0.1gr will make a difference on the group.
It's just that I don't trust my Lee Perfect powder measure .
This thing will beautifully throw the exact powder charge at 0.1gr five times in a row and then... be off by 0.7gr on the next one.
So I prefer to check the weight systematically.
And if I detect a 0.1gr deviation, well, if I have spotted it, I am too perfectionist not to correct it!
Anyway, overall, I would do a very good review for that Frankford scale. Mine does the job!
The only time I've noticed mine getting squirrelly is when it needs recharging.
I don't have a powder thrower so I hand weigh every charge.
I calibrate every time I start and push the tare button every time I put the pan back on the scale.
I simple check weight(s) would be a good thing.
I just use a small stainless steel nut and bolt. Each should always weigh the same every time. I keep them in a zip lock bag with a note stating their weight.
Oldbloke wrote:I simple check weight(s) would be a good thing.
I just use a small stainless steel nut and bolt. Each should always weigh the same every time. I keep them in a zip lock bag with a note stating their weight.
bladeracer wrote:Oldbloke wrote:I simple check weight(s) would be a good thing.
I just use a small stainless steel nut and bolt. Each should always weigh the same every time. I keep them in a zip lock bag with a note stating their weight.
A five-cent piece is supposed to be a standard 43.7gn.
I'm using copier paper as I worked out a few months ago. Currently loading 38gn loads for the .303 so I'm using a sheet of A4 cut to 147mm length, then folded up into a little lump I can drop on the scale periodically. A fixed calibration weight is handy, but it only tells you whether the scale is accurate at that weight, not at any other weight. I can calculate how much paper I need for whatever weight I'm working at and confirm the scale is correctly giving that specific weight. I have check weights from 1g to 50g, which are 15.4gn, 77gn, 154gn, 309gn and 772gn. With a digital scale you can be weighing any weight and toss on a check weight and it will weigh it immediately. With a beam if I'm weighing 38gn charges and want to confirm it's still accurate I have to set the scales to 77gn, then weigh the check weight to confirm, then set it back to 38gn, during which I could conceivably make the same mistake setting the scales and be off still.
Lazarus wrote:Trouble with paper though Blade, it's absorbent.
Granted, it's only going to absorb a fraction of a feckhair, but the chrome calibration weight that came with the scales will still weigh the same 100 years from now.
As with everything though, if you've found a method that works for you and you're getting the results that you want, that's all that matters, eh?
Larry wrote:Its easy to use projectiles as check weights if you wish to work in grains.