I agree that something isn't right. I didn't measure the 30 cals, but I checked them and the other calibers. The 6.5 and .277 were correct, but the 308 was not, and I used multiple bullets (hornady, nosler, and barnes) to verify that wasn't the cause.Something ain't right. Take your calipers and measure the inside of the case neck. It should be .309 or so. Also measure the outside of the bullets. They should be .308. The bullet should slip in and out easily. Next insert the comparator with a bullet and the push rod loose. Take a cleaning rod with no jag and insert in the barrel until it touches the bullet. Use the cleaning rod and the push rod to feel the bullet against the lands. Go back and forth until you feel where it's touching. Tighten the screw and remove and measure. Do this several times until you get the same measurement. That's your touch point.