Due to the grace of garage sale gods I have added a RCBS 1010 scale, and one RCBS 505 scale and one Redding BB scale on top of one RCBS 1010 and 505 scale and a PACT digital powder dispenser I already owned.
I found my Pact is consistently off (per average of both my 1010 scales) by +/- 0.20-0.250 grains. Few times it was as much as 0.35 off but that happened only once a long time ago using IMR7828 and never since, but if not for having available and using my 1010 to double check every powder charge I wouldn't have caught it. I owned both the 1010 and 505 before buying the PACT some 20-23 years ago and knew even then NEVER to trust any digital powder dispenser in the price range of the PACT and strongly advise as possible no one else do either.
I am triple redundant when it comes to weighing my powder charges for my bottle necked calibers.
Like many here I use the pact to get within 0.2 grains of my desired charge weight then use my Redding powder trickler and my RCBS 1010 to get the exact charge weight. I use the second RCBS 1010 to double check every second or third charge. When reloading powder charges for a established favorite accurate reload I double check with two 1010's every charge.
Wish I could justify/afford a A&D ENG FX-120I but I can't. Until then will get buy with the RCBS 1010.