MI223 is giving good data but I feel like something is missing at the same time i feel like it is a known. What is the depth of your bolt head? It should wrestle around at .120 +or-. this is important becase of the nose clearance of wht MI223 mentioned and the ability to make head-space. So if your bolt head depth is .120 and your gauge protrusion is .130 you will have < .010 - nose clearance at correct head-space