I own a few RCBS molds and concur as to their fine quality. My Lee molds seem to always cast excellent ball/bullet. But the two Saeco molds I have left - foolishly sold one of the 4 cavity molds - are a challenge for any others to best, or even equal. And I'm not "mold poor", either. Let's see; there are T/C, Lyman, RCBS, Saeco, Tanner, Lee, DGW and another one or two I can't readily recall.