General > General Technical Chat
You want a digital scale for What??
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Mr. Scram:

--- Quote from: GlennSprigg on August 04, 2020, 02:17:23 pm ---Not aimed at you mate....  Have a good day!!   :)

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It doesn't make sense either way.
Simon_RL:
I used to use a similar scale when I was into target archery for arrow building. I was important to get each arrow weight as close to each other as possible to ensure consistent fight across a set of six + 2 spare arrows. That scale measured in both grams and grains, can't remember the resolution now.
TimFox:
I read an interesting use for weighing scales in a biography of Henry Ford and his motor company.  At the beginning of WW II, the company management was somewhat chaotic and the Army sent Henry Ford II back to civilian life to fix things, since Ford Motor Co was important to the war effort.  He found that accounting was keeping track of accounts payable by weighing the paper invoices (as some here weigh bags of components to count them).  The author noted that that this was not as dumb as it sounds, since accounting had previously calibrated this process to get an acceptable estimate of the cash flow.
Robert Lacey:  Ford, the men and the machine  Boston: Little, Brown & Co 1986.  pp 429-430.
El Rubio:

--- Quote from: dkim5nu on July 31, 2020, 09:25:05 am ---Reloading (manufacturing ammunition for guns) requires precise measurement of explosive powders. For example, 9mm round requires a range of 3 to 5 grains of explosive powder inside its shell casing behind a projectile. There are 7000 grains in one pound and 454 grams in a pound, so that's about 0.195 grams to 0.324 grams per round of 9mm. Anything more than that, the ammunition is going to blow up your hands.

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Not necessarily. I have been reloading since about 1985. I currently use a cheap digital scale supposedly accurate to 1grain The problem is if you are trying to measure 4.2 grains for one of those 9mm rounds. 3-5grains is unacceptable. I am not worried about 5 grains damaging the gun as much as the desire for accurate and consistent loads. I use this method to increase the accuracy of my powder charges. For those of you not familiar, measuring gunpowder is done with a simple device that usually has an adjustable cavity that is filled with powder. You measure the powder by volume and adjust until it is what you want- say 4.2 grains. You may use different powders for different loads and they weigh differently. Back to my method. I Adjust the powder measure to throw 4.2 grains according the cheap scale. Then, I throw ten charges and measure them all together. It should weigh 42grains. I fine tune the powder measure until 10 throws are as close to 42grains as possible. Now if my scale is off by a grain, it is only 1/10th of a grain per charge. 4.1-4.3 is fine.
Getting back to overcharging rounds. 9mm is not a great example because the case is so small. You can definitely overcharge a 9mm, but I have not used a powder that would even fit a double charge into a 9mm case. I had concerns using “Unique” powder for 9mm once because the 5-6 grains called for nearly filled the case. I was concerned that seating the bullet would compress the powder which is something you don’t want to do. There’s a lot of space in a 357mag and that could get dangerous. Especially since most 357 owners will also run 38special. The cases are the same except the 357 is a little longer. It is quite possible to load a 38 with a 357 charge if you aren’t paying attention, but I don’t know anyone that doesn’t double or triple check things like that when reloading. I read about the 10x measurement back in 80’s when I used an analog RCBS scale and have used it since.
jimdeane:
I felt a little odd buying a cheap milligram-precision digital scale in my last Amazon order. But my use IS drugs -- measuring the weight of my asthma inhaler after doses to determine if the dosage is consistent throught the range from new to last dose. (I suspect it is not -- I have much worse symptoms in the last week or so of use.) If my data supports my hypothesis I can then submit a stronger argument to the FDA and the manufacturer that there is a problem.
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