Powder weight vs. volume

[Catfish]

From what I have seen at the bench rest compations almost all of the competors load from a measure and never check the weight of the individual charges believeing that that they get more consistant loads from the measure. What Rocky said about the things that will change the weight of the voulume thrown are all true, but when you have a high quality measure mounted on a stable platform without bumping it around the loads should be more consistant than by weight. I might also add that with the high quality measures they use the vairation in the weight of the charge dropped in very small. 99% of my loading is on a Dillon 550 press and I set the powder measure on it and never check it untill I change loads. I load for several guns that shoot under 1/2 moa with these loads and a couple that will put them in the low 2`s. I will also add that I use ball powders 99% of the time. The Dillon powder measure is great, but not quite consistant enough for stick powder.