I have both powder checkers, I use the lock out die for straight wall cases.
And then there is that thing about; "How important is it to you?" I know the weight of the bullet, I know the weight of the powder and I know the weight of the case, when I finish I know the weight of the loaded round. I have thousands upon thousands of cases, there is no excuse for not being able to match cases by weight or by another standard.
And the there are all of those variables that I do not have, If the weight of the round is not correct it has to be the powder. And then there is the lock out die, I will not load on a progressive press without one; so I have a RL550B, I do not seat on one position and crimp on another because the 550 has a 4 position tool head.
And then there was that day at the range, a shooter/reloader was doing everything he could think of to pull the trigger on his S&W Model 66; he could not pull the trigger, he could not pull the hammer back, he could not advance the cylinder nor could he open/swing the cylinder out. He had missed one cases when dumping powder, he pulled the trigger, the primer drove the bullet out of the case and into the forcing cone without clearing the cylinder.
We stopped shooting and put our stuff up and offered to help, We drove the bullet back into the cylinder and then opened the cylinder. As soon as he got his pistol back he started loading 6 rounds, I suggested that was a bad ideal, we just drove a bullet out of the barrel on one case that did not have powder; I suggested the powder that did not make it into the case we had to remove could have made it into one of his other reloads. We offered to help him with his reloading, we offered to loan him equipment etc.. We offered to give him all the ammo he could shoot, the more we tried to help the madder he got. And that is the way he left.
F. Guffey