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Scale linearity?

I might be looking at this wrong but for me repeatability is the key feature in a reloading scale. I am not compounding pharmaceuticals I just want 75 loads of powder that are within a reasonable amount of each other, plus or minus .02 grains is plenty accurate enough for my needs. My wind reading and technique are a far cry from a machine rest so 1 kernel of Varget difference will get lost in the "did that mirage just shift and the why did the wind flag at 200 just drop and how will it affect my shot moments". If I can load 75 today that are acceptable, and 75 next week that are the same as the 75 I loaded today I am a happy camper.

I use inexpensive scales and get single digit SD's and isn't that the whole purpose of a load ? Not to see if it is within .00001 grams when tested by the NIST or impress your buddy at the range with how much money you just spent on a new reloading toy. Develop your loads and you should have a .1 gn window on either side of the target weight where being off by plus or minus .1 or will not affect the velocity more than 4 or 5 FPS. For me shooting F class that is plenty. When I were take up 600 and 1000 yard benchrest I will have a $2K Sartoius sitting on my bench but I will address problem when that day comes, if it ever does. At the moment it is nice when developing the load to keep the charges less than .05 grain in difference and that can be done with a $50 Chinese unit from Amazon and mine seems to be within .02 grains of the checkweight bullet every session. I am aware that many use a lot more accurate scales but at the target is there really that much difference if you are loading to a flat velocity node?

just my 2 cents worth
 
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