Bearcat,
How can you tell pre-gauge and post gauge? IMO if you are shooting acceptable groups to you, then how much of this gauge-testing comes into the picture. I mean I like to load and shoot and shooting with known good ammo with a particular rifle "tends" to product good groups with the same components. Its when nothing is working that maybe this gauge you get may tell you where to look into a problem. This is my way of thinking but I am not the know all in reloading.
