I usually load in lots of 500 for my match stuff. I had/have methods to run on a single stage that is fairly quick and easy, along with safe. I just have to have all my gear set up, prepped and ready.
I had a 550 for a while and the use of a 650 and a 1050. The 550, being a manual advance I did not care for.
I used a loaned Hornady for a while and liked it. Swapped my 550 and all the extras for a slightly used Hornady and a NIB as well.
I use these more as a progressive turret.
I still prime by hand.
I still charge on at a time.
Priming one at a time is also a case inspection time as well.
Charging one at a time, is also a last chance of a cull of some type getting by.
I prefer a load that a double charge will fill to the case mouth or over fill, where it is plenty obvious. Doesn't always work but that is what I have come to prefer.
I won't get into it but when I first came over here, it really rattled me of the use of minute charges of fast burning powders in bottle neck cases. Don't mean to ruffle feathers of those that do.
I always figured powder,primer,bullet,cases were cheap. Guns and hospital bills are expensive.