I have used the Lee Perfect Powder Measure with good results considering the cost of the unit. I use the adjust and then weigh method of setting a charge weight, Not the formula thats in the instructions. I have also found that in order to get consistent and repeatable charge weights you must be consistent in your operation of the unit. What I mean by this is always use the same force and technique on every charge when reloading a batch of ammo. I always visually check the powder level in the case and weigh every fifth charge when doing a batch of reloads. On some powders I weigh every charge ( H110 ) just to make sure.