I've searched every word combination I can imagine, but can't find any results from plain basing a C358-158-SWC. I found some reference in a 2007 thread about Milling out the step or milling off the top, but no results, or if it was ever done. My question is, has anyone altered that mold by either method? If step is milled out, should it go to the next band, leaving a wide base band, or milled out shallow to create a (new) narrow lube groove? If anyone has tried, how did it shoot at various velocities? My intent, for those that will ask "Why?", is to obtain a 6 gang, plain base, heavier than 158 grain, conventional lube grooved boolit for up to magnum velocities in revolvers, and seeing what I can get without leading in a Rossi carbine. Something similar in performance to a 358429. I don't mind sacrificing a $20. mold to experiment, but would like to hear others experience if its already been tried. Thanks.