Volume not matching weight

I load most of my semi auto rifle rounds throwing charges by volume. I have been loading this way for many years. I first work up my loads by accurately weighing each charge, once I settle on a load I adjust my Lyman 55 to throw that exact charge weight of that particular powder and load in bulk using volume measure. I record the volume measurement from the powder thrower for future loading of the same cartridge. I do check the fist toss to make sure it is what it should be, then carry on in bulk. Obviously some powders do meter better than others, but if you take a few precautions it is an extremely reliable and consistent method of measure and is MUCH faster than measuring each charge. Most powders will meter +/- 0.1 grain, some stick powders are in the +/- .2gr range. This is perfectly acceptable for my accuracy requirements with any semi auto rifle and perfectly fine for any hunting ammo I require. If I want 50 or 100 perfect rounds for punching paper at long range, then I will weigh each charge and only then. I'd rather spend my time shooting.
 
That a Lee manual? Lee tests nothing themselves and only they know why they calibrate those scoops(that can vary the powder charge plus or minus a full grain) in CC's.
Forget CC's altogether. CC's are a metric unit of liquid measure than have nothing whatever to do with reloading. Only BP is loaded by volume, but not in CC's.
 
While some consider using a powder thrower/measure as loading by volume, I do not. If I am loading a cartridge in bulk and am not running near "redline" I will set my thrower up to throw the prescribed WEIGHT of powder and then check the thrown WEIGHT 1/2 dozen times and then go ahead and throw the powder charges directly into the cases. I will then pick 3 or 4 from random spots in the loading tray and WEIGH them as a consistency check, and any cases that appear different from the rest in fill level will be WEIGHED to be sure no bridging has occurred and the powder charge is within the appropriate parameters.
 
c-fbmi said:
While some consider using a powder thrower/measure as loading by volume, I do not. If I am loading a cartridge in bulk and am not running near "redline" I will set my thrower up to throw the prescribed WEIGHT of powder and then check the thrown WEIGHT 1/2 dozen times and then go ahead and throw the powder charges directly into the cases. I will then pick 3 or 4 from random spots in the loading tray and WEIGH them as a consistency check, and any cases that appear different from the rest in fill level will be WEIGHED to be sure no bridging has occurred and the powder charge is within the appropriate parameters.
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There is nothing to consider. Throwing a charge from a powder measure is loading by volume regardless of what you think that volume weighs.
 
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