[QUOTE=Half MOA;6850668]I am thinking that if the ogive varies from bullet to bullet weight, so will the distance from the lands.[QUOTE]

correct.. but I can still set to same distance to the lands of .012" with any size bullet if that is what the rifle likes.. I'm just being lazy really.. and hoping that all bullets will work at that distance as well as my 75 Amax so's I don't have to faff about ladder testing every type of bullet for optimum seating depth and I can just get on with load testing!