So I am having some issued with loading for Suzy (the 6.5 creedmoor that I just recently got). I bought a set of RCBS dies to load for this rifle. I am using Nosler virgin brass (not factory seconds). Bullets I am using are Nosler 120 gr ballistic tips. As I am doing load development I like to try and obviously have the same seating depth for each round. After I load my first round I continue to load the rest in my test batch. For some reason after I seat the first one and then go to the 2nd, 3rd, and 4th round the seating depths do not stay the same. Sometimes the jumps are as much as .0010 sometimes as small .0001. I am using a Hornady CBTO gauge to try and give me the most exact measurement possible, instead of just measuring cartridge overall length. Anyone have any guess as to why this is? I have never experienced this before with any other round I reload for.