Ok so I have a little problem with this, I've been trying to model a 7.62x51 as a 3D model but the second angle doesn't seem to fit so I looked at it a little more and it looks like the blueprint is a little fucky wucky, the exact same vaulues are on other blueprints so I dunno what to do now, the other values on the chart also seem to check out except the angle. I'm most likely just bad at reading blueprints. Please explain.