...About the only thing I'd add is that you might want to intentionally double-charge a case just so you know what it looks like and have a visual reference for comparison. Just be certain to immediately dump the powder from that case when you're done comparing so you don't inadvertently seat a bullet on it!
I was going to suggest this as well. I use AA#5 (anti-fluffy as well) with some light .357 loads. "Case fill, what's that?" Even with that, a double charge is quite noticeable.
Perhaps an inspection mirror w/ a light would help the process. I seem to recall reading somewhere that a guy rigged a mirror & light setup on his press. It may or may not be practical for everyone, but it might be worth investigating.
“At the core of liberalism is the spoiled child – miserable, as all spoiled children are, unsatisfied, demanding, ill-disciplined, despotic and useless. Liberalism is a philosophy of sniveling brats.” — P.J. O’Rourke