The best way I know of for setting the anti-skating is to use the Hi Fi News and Record Review test record. It's available at several different audiophile vinyl outlets (Red Trumpet, Acoustic Sounds, etc.). They have several successive tracks of a tone in stereo cut at increasingly high modulations. One simply cues up each track, listens and empirically adjusts the anti skating force until the minimum amount of force necessary to prevent audible distortion is found. When there's inadequate antiskating force it's VERY EASY to detect audible distortion. The test record can be used for several other adjustments as well, but if it only had the antiskating adjustment feature, that alone would make it worth the cost. BTW, IMHO a blank region on a record is no way to set antiskating: without grooves, it is not a true negative control.
Anti-skating: how to set
I'd appreciate some help on setting anti-skating on a Rega 25 and an SME V. I have no access to an oscilloscope. I do have the Cardas "Sweep" record, which has areas of blank grooves that may be intended for (among other uses) setting anti-skating force with pivoted tone arms like mine. I did set anti-skating force that way, adjusting it until the cartridge remained stationary, moving neither in nor out. Can I have any confidence that this procedure gets it right?