For accuracy shooting the reloader will use a hand crank Wilson ,Sinclair etc. rather than the Lyman or RCBS motorized trimmers . Are the motorized trimmers that inaccurate and is a 0.001" in case length going to the extreme . Is the potential squareness diferences between the two methods REALLY going to show up on target . It's easy to say, I really don't want to find out but has anyone actually done THE TEST? I know the theory - - but ?