ORIGINAL: firstshot
Seems to me that since you are measuring from the base of the brass to the point where the side of the bullet makes contact with the lands, the distance to the lands should be the same regardless of which bullet you are using to do the measurement. The actual distance to the lands does not change, period. Why am I getting different measurements when using different bullets?
The part where the bullet meets the lands is called the ogive, (pronounced o-jive) it is different on every bullet brand, some bullets (even though they are the same weight) may be longer or shorter. For example, I have Nosler B/T's, Nosler Accubonds, and C/T by Nosler......all 3 are 180 gr (.308) but all 3 are completely different. You need to have a new set of measurements for EVERY different bullet you want to shoot.