Originally Posted by shotgunred
Two of the four systems you talk about offer nothing better or safer than you looking in the cases. the other two are not necessary as long as you keep an eye on how much powder is in your press. You should never let the powder get low enough for any of these devices to do you any good.
This is the on going argument against powder check dies. The way I see it, it's one more safety device that may prevent an accident. I don't use them either, but I'd never fault anybody for using one. And I have to admit, it'd be nice loading 357mag.