Holiday... if I were going to buy a new powder scale today, I'd be the RCBS 5-0-5 made for them by Ohaus.
I wore out an Ohaus 5-0-5 after 40 years of use and called Ohaus to see if I could order the two V-shaped hard-plastic parts in which the balance beams extensions lay.
The gal I talked to said those parts have to be installed using a special air gauge which, of course, I didn't have. She said that now, Ohaus exclusively makes scales for RCBS only.
I ended up buying a RCBS 10-10 Powder Scale, the top-of-the-line RCBS Scale. However, I've found the "drum-type" 10ths. of a grain scale on the Model 10-10 very hard to read and I wish I had purchased the lower priced RCBS 5-0-5 which is the same thing as the old Ohaus 5-0-5 Powder Scale instead. The Model 5-0-5 was a very simple, quick & easy to set, readable powder scale which I'd prefer to the Model 10-10.
The 5-0-5's and the 10-10's scale's "arms" are magnetically "dampened" so the "arm" settles down & gives it's reading very quickly... and you can get EXACT powder weights... that is a perfect powder weight of "41.5" grains with a "0" difference.
From what I understand about the electronic scales and their "read-outs", if they read "41.5" grains (as example), the actual powder weight COULD be anywhere from "41.45 grains to 41.54 grains"... a variation of almost 1/10th of a grain of powder. THAT is a "BUNCH" if you're doing ALL you can to make EVERYTHING "consistent". Experienced reloaders KNOW that it's "consistency" that helps create those "one-hole-groups".
However, with a mechanical scale, this amount of "difference" would be quite noticable and show up very obviously because the "pointer" on the scale's "arm" would be noticably "high" or "low". The "pointer" would certainly NOT be on the "0" which indicates a PERFECT charge weight of "41.5" grains.
I hope this has reached you in time... buy the RCBS 5-0-5, you won't be sorry. I'd gladly trade my 10-10 for the 5-0-5, but I'd rather have EITHER one than an electronic scale.