I am reloading a 264 mag. Nosler Part and Hornady SST. Two different OAL. Noslers don't have cannelure, all is ok. SST do. My ogive length for them makes the bullet sit slightly above the case mouth and the cannelure doesn't touch that. My question is, do I seat them ten thousandths off the ogive dimension, or push them on down to the cannelure? All the reading I've done says for more accuracy measure for the ogive and then seat accordingly. With sending down to the cannelure, it takes me to about .35 off the ogive. THOUGHTS?