I'll have to agree w/ the slowpokeslim way of thinking......... I've been guilty of offering advice to new bbl swappers who probably are not aware of all the ramifications of using F/L sized cases as HD SP gauges. :-[ Lets face it, there are too many "ifs" in this method for the novice. Particularly, the novices that don't have comparators or understand that all sizing dies are not created equal nor are the shell holders........ With only one exception, I've always used a go-gauge. If we don't know the knowledge level of a poster we can be doing a potentially dangerous dis-service. JMHO, Dale