Yep! Right on for assessements. I also have a Harrells Premium. Love it! Don't get to use it at the range for load development unless the powder grains are shorter or ball.
If you get a chance to read/buy Glen Zediker's book on loading for accuracy (not the acutal title) in it is a section he devotes to "throwing" powder. It will open you mind to the possibilities of these types of "meters".
The "Culver" type meters were developed for BR shooters who 1) load at the range and 2) predominately throw fine grained powders.
I love my Harrells! I use it to develop loads "at" the range when the powders involved are fine grained extruded or ball type powders. Such as H4895, R15, TAC, Magnum, etc. I've use my RCBS Uniflow w/ the micrometer insert to do the same thing. Harrells clicks are VERY nice.
I've thought about selling mine to finance a RCBS elec scale/thrower combo. Can't bring myself to trust an elec model in which I "CANT" see things moving.
If you ever get a chance, call Lynwood Harrell. He can give you some pretty good tips on "thowing". When you come up on the stroke, slowly, without banging it. Wait a few seconds, bring it back down slowly to the bottom. Now, many of the powders I throw will hang up about 1/2 way down. When that happens I smartly tap the handle to "break" the powder grain but I catch the handle before it hits the bottom. This has given me some pretty good consistency.