I've always used a RCBS powder charger, It was a older version with the glass tube But since I moved I left that one for my dad and took one of the extras that we have never used. Its a Uniflow II I make sure it was clean and started using it. I've loaded about 1000 rounds with it so far but I'm not comfortable with how inconsistent it is. It will do 4 or 5 in a row that is dead on zero then it will give me one that is usually heavy by about .3 or .4 and after the for no reason it will give me consistent light ones that are .2 or .3 under Even though I keep the powder level the same (about 1" shy of the top). I use the regular technique I did back home with the older powder charger which was tap the handle to the top twice then throw. That seems to give me better results but still not +/- .1 which is what I'm used to. I'm using Unique and have never had problems with it before.