It seems to me getting a good measurement on how deep the throat is near impossible with any method. However, I made up a dummy round with a 55 v-max and ran it in the chamber then removed, measured, and then seated the bullet little by little until the bolt felt like it closed with no extra resistance. I did this with a 55 Nosler BT and it came out within a few thou of the Hornady when measured at the ogive. It seems I have about .150" of jump with a 55 v-max seated at 2.680" Is this more than normal. By the time I load the mag properly with the each rim in front of the one below it the top one may not fit. I am going to load all my starting loads based on the 2.290" measurement on the ogive which is what a 55 v-max measure with a coal of 2.68. Am I on the right track? I need to get a modified swift case to fit my Hornady coal gage but it doesn't seem to be very consistent either. 
