I virtually weigh every charge individually up till recently. I picked up a 2nd hand Dillon Square Deal for 9mm & will the increase in volume of 9mm ammo consumed to date, it would be ludicruous to weigh every charge. So I run a moderate charge of 3.5gn of Red Dot behind a Demon Projectiles .356" 135gn conical. If the Dillon powder unit throws a touch high it isn't too much of an issue. Actually, I've found that it is fairl consistent with Red Dot.
I've also increased the amount of 357Mag ammo used, so I bought one of those Lyman Brass Smith throwers. It too is very consistent with the AP100 load I use.
As for my rifles though, all loads are individually weighed on a set of beam scales. Once I get my finger out & buy a Magnetospeed chrono, I'll be able to see what degree of velocity consistency individually weighed charges gives.