Re: Powder measuring
I HATE, HATE, HATE to trickle up to my weighed charge, but I so it when loading powders that don't "throw" well.
For years I threw powders with my RCBS Uniflow with the micrometer insert.....then I bought my Harrell's Premium meter. I actually bought the Harrell Custom 90 meter first which I loved but I sent it back because Lynwood Harrell (smart man that he is), let my test drive a Premium, which I bought. I won't sell my Uniflow, preferring to keep it as a backup should I have my Harrell Premium out of commission until I can obtain a replacement.
For smaller grained extruded like H4895, H4350, H4831sc and other short cut powders I will throw my charges. I'm using Rel 25 in my 30-06 Ackley Imp and can only get to with +/- .4 gr (.8 gr total). I need to perform a long range test on "thrown" charges of Rel 25 and convince myself I don't need to "throw and trickle to weight".
Another reason I like to throw is I can load and develop loads at the range. No need to have a scale, electric or beam (my fav).
And last but not least, after reading the treatsie by Glen Zediker in his book on Competitive Reloading, I'm convinced weighing from day to day, I will end up with different weights in the case as powders can and do gain/loose moisture, hense weight; and scales, when zerod from day to day change their zero. Where as a "volume", read that as "thrown or metered", will not change with a culver style of meter such as the Harrell's.
That's my take on the subject.