I think there is one thing in common with beam and digital scales. They are both accurate to one tenth of a grain. If you check one for accuracy against the other, how do you know which one is right? I think I read that ammo companys use bulk measure to load their ammo. I can't see them paying someone to sit there and check every chg. I weigh every charge but I suspect that I could get one charge weighted out right on then throw ten more and weigh them and if it come's out right, throw charges right from the measure into the case and not have much of a problem. The big secret to using a powder measure with tube type powder's is working the measure the same way every time. It's not that tube powder's measure so bad but rather that handloaders are not consistent in the way they use the scale. When you go up with the handle and come to the stop, the bump settle's the powder every time. If you don't bump, tube powder will not pack the same way every time in the measure. That results in a varience in thrown charges. If you go up and hit the stop a couple times good the powder will settle into the cavity awfully close to the same every time. I have done that experimenting a couple time's and I can say without doubt, it works!
I intentionally throw chgs light and trickle up because I don't always work the measure the same and I know it. I have always thrown ball powder's for my handguns right into the cases once the measure was set. Probably the wrong thing to do and pistol powder's I use are fast enough to have a bit wrong chg meaning big trouble. Never have had a problen. Of course using ball rifle powder's I revert back to light throw's and trickle up. Just makes me feel better. Think about the progressive press's. You don't weigh each charge reguardless of type. You just mset it sot you get a charge that weight's right an then throw every round with bulk measure!