[Unclenick]

Higgite,

Moly bullets usually need somewhere around another 0.3-0.5 grains of powder, or thereabouts, to get a velocity match. Shouldn't be enough difference to prevent functioning.

Since factory loads work, the gas system shouldn't be too far off, either. That's really suggesting that something actually is wrong with the scale and it is reading around two times higher than actual weight.


Black Sheep,

(You posted while I was composing so this sort of duplicates your conclusion)

A couple of simple tests:

Weigh a dime. They vary too much to be reliable check weights, but a 2:1 scale error is easy to detect. It should weigh about 35 grains.

Fill an empty case with powder level with the top. Pour the powder onto the scale. It should weigh less than 30 grains.