I have approx 120 rounds of 300 win mag that I want to reload (I'm new to reloading). I was looking at what I documented last night and from the shoulder measured with a comparator, all cases average 2.2715 (.270 is shortest; .273 is longest). If I just measure the OAL case length without the comparator, I get 2.0403 as an average. Wouldn't the length from shoulder with a comparator be a shorter reading? This is all once fired brass. Case Max Length is 2.262 by SAMMI specs. If I put the cases into my lyman E-ZEE case length gauge, they all fit? Average for 20 cases: Shoulder length with comparator = 2.2715 OAL case length = 2.0403 Shoulder Diameter = .4914 Web Diameter = .5134 Neck Outside Diameter = .3419 Case Neck Thickness = .013 Am I doing something incorrectly?