Powder loss? I use a volume measure over a bowl. It catches all the spilled powder, and it goes back in the bottle. No loss.
It's important to use the same method everytime. I always over fill the measure, and then tap it with my finger to get it to settle in the measure. Then slice it off even at the top. I then either pour it in tubes for the range, or speedloaders for hunting. It's not a true smokeless powder that needs to be perfect in weighing it. You'll never see a couple of grains either way on the target.