Maybe sharing what we done dumb. Might help new loaders to know what to watch for.
Some i have done. Forgetting to adjust the seating stem after loading FP and going to RN. Seating stem again after loading 38 special. And going to 357. Now i do 357 1st. Not enough powder in .223 and 7.62x39. I load them on my turret with a auto drum powder drop. Powder cop die has saved me a few times since getting them. My other rifles i batch load. So i check powder levels when thier on my loading block. And have also forgot to turn the powder hopper off before removing and lost some powder.