LA50SHOOTER
Sworn To Protect The Constitution.
I have found that turning speed above 300 rpm for neck turning isn't really ideal, especially if the cut being made is 0.0007 or more. It leads to galling of the brass and the cutter blade seems to start acquiring a "plating" of small spots of brass residue. - I don't claim to be an "expert" but I have turned over 4000 pieces of brass in the last 12 months in various calibers using good tools to do so. - I believe around 240 rpm is an good speed to maintain and keeping cuts to 0.001 or there-about in depth maximum produces good results. - If a second pass is necessary to get the necks to the desired thickness then so be it. - I use 21st century, Sinclair & K&M tools all with good success.