I had lost the pan to my Ohas 10-10 scale and bought a Dillon beam scale at a stocking dealer. What a piece of junk!
I have 3 digital scales, as they age, they lose their ability to not wander around the desired setting. I found my 10-10 pan and trust it. I also have a Mid 80's Hornady "Magnetic Dampened" beam scale, it it extremely sensitive (in a good way!) and accurate. and repeats weights for days on end! I have
I have the large and small sets of Lyman Check Weights and check my scales often. The Ohas and Hornady have never changed!
I load on a 1984 Dillon 450, converted to a 550b, and load all the cartridges listed and more! Once the case mouth activated powder drop is properly set, it drops the same volume of powder until readjusted. If you change to a different lot # on your powder, you could have a weight change. (I buy 4 or 8 pound jugs of powder to deal with this!)
For pistol loading, When I think the powder drop is correctly adjusted, I drop 10 charges in the scale's pan and weigh and divide by 10. That gives me the true average. I do 5 on large rifle charges.
My Dillon success story is, In 1984 I loaded 20,000 rounds of 223 for my Mini-14 and got 1.5 MOA at best. I thought it was the ammo. I sold the Mine in about 1992 and in 1994 bought a Bushmaster AR-15 and scoped it with a Leupold Veri-X III 6.5-20x40mm AO That same batch of ammo shoots .1 to .25 MOA out of several rifles (So it wasn't my ammo!) That load was WW748, CCI Small Rifle Mag primers, and Winchester 55 gr FMJ w/Cannelure, and mixed military brass. It took most of a month to prep and load all those rounds! When I moved about 7 years ago I still had 6000-6500 left so I gave half to one of my sons that has a Stag Left handed AR. He gets the kind of groups I do with a Red Dot! (Thanks to his USMC training!)
I also loaded my most used cartridges, 45 ACP, 45 Colt, 44-40, 44 Special, 9mm Lugar, and 38 Special in batches of 5000. Depending on what sport I was shooting at the time, 5000 rounds was a 6 month to 2 year supply. Coming up with those quantities of brass, bullets, and primers wasn't difficult in the 80's and 90's, now, it is a big problem!
Have fun getting back to reloading, shooting it all, and reloading again!
Ivan