If I was a top ranked competitive shooter I would probably would (have) to do that. I really don't sweat it much after I have the auto disk powder measure set and checked for the charge that I wish to load. I rarely do any other checks, although I know that I should, other than watch into the case to see if the charge is there and if it looks like all the rest.
I have never weighed completed rounds for consistency although I know that some people think it's a good idea to check for overcharge or squib rounds. The counter argument is that the inconsistency of case wall thickness, if you are loading mixed headstamp, precludes making much assumption about variance in weight.
Regarding COAL, I will place all finished rounds into the tray for the box I'm recycling and examine the whole tray from a couple of different angles to see if there are any ones longer than their neighbors and at the same time run my finger over the primers to see if any are standing proud of the base.
Pretty unscientific I know, but they all go bang....as long as I follow that big rule of looking into the case to see the powder. I don't load anywhere near max pressure. If I did I would be a tad more careful in auditing charges.