I've been reloading on a Dillion 450 upgraded to 550B since the mid 80's. Being a 4 station press, there isn't a location for a powder check device. The only time my Dillion has run a empty case through the steps, is during set up with no powder in the measure! I suppose if you used an large grained powder on a small mouthed case, there could be a problem. I've loaded 22 Hornet for the smallest rifle, and 32 ACP for the smallest pistol. I have found that the most consistent loads come with the powder measure being filled from 1" above the baffle to 3.5" above the baffle. So I used 1/2" masking tape, and marked "the zone". If you wish to use up a press position for a Lawyer Liability Devise, that is your choice of course, but I would rather separate seat to length and crimping operations or some other type of operation. While it is not required, but using only the current Dillion powder measure is the best way to keep your progressive press loading consistent charges (I also use Dillion powder measures on my 5 Station Hornady L-N-L AP press also, not Hornady's converted monstrosity of an otherwise great powder drop!). The original 450 powder drop wasn't case mouth actuated, it was a push bar model, that was one of the most accurate drops I've ever seen. But if you didn't pay attention you could miss that step, and I think this is what got the low powder indicator involved. It is your money and your ammo, so you get to choose. Have fun. Ivan I JUST NOTICED THIS IS A 2 YEAR OLD THREAD, THE INFO IS STILL GOOD JUST NOT RELEVANT. Ivan