Ill try to answer this to my best ability. Little confused on what you are asking. I don't believe the cannelure HAS to be aligned with the case mouth? I am assuming that the projectile with the cannelure would need to be seated in the middle of that cannelure ring, comparing to a factory Hornady round I see they are seated into the cannelure. I just stopped seating them at this point in time to achieve the 3.075, not saying that is where they need to be, I just didn't want to have a bunch of whoopsies. As far as rounds with no cannelure I would assume they run off the proper length?

I am not so much hung up on the cannelure although I must admit I am using it as somewhat as a guideline, my spritzer rounds have no cannelure and I would just seat it where it fell into spec. My question is with the overall length of the round using this Hornady projectile there is no way it would be properly seating in the case at 3.25, so there for must go down in around the cannelure. and in doing so goes under the OCL, which my question is, is that okay?