Ok, so I have been doing my own reloads for almost two years with ok results and would like to take it a bit farther. I have a .260 and a .300 wsm and would like to start using bergers but am concerned that my equipment isn't up to snuff. I use an rcbs trickler and beam scale for every round. I have an electric powder dispenser but the accuracy is off somehow. I use a rockchucker press and rcbs dies as well as a lee priming tool. I debur the mouth, flash hole and unify the primer pocket. I now have lapua brass, but when I used REM brass I would sometimes get copper shavings when I would seat the bullet. How do I fix this? Also I have a Wilson case trimmer, if I see their web site correct they sell the attachment for neck turning, do I need this? Do I need to get better dies or are the rcbs ok? Do I need a concentricity gauge? I will be doing mostly hunting and targets.