10-02-2018, 01:31 AM
4.80mm, 4.75mm, 4.72mm, 4.72mm. Those were the very unscientific measurements of the inside of the bore to thread top height at the 12, 3, 6, and 9 o'clock positions of my barrel. So assuming user error (totally safe assumption) I would say the threads are concentric. I am taking the rifle, a handful of brakes, a ton of tools, and some ammo out tomorrow, and will post results of the various boring but important testing that occurs. At least I will be generating spent brass.