My bolt head is damaged, and I'd like to replace it with an aftermarket one. I've never done head spacing, but I read an article at brownells.com on how to do it. I'm not going to recite the whole process, but basically, I'd loosen the barrel nut, and screw the barrel in or out to gain the correct spacing, using a go- and no-go gauge. Then retighten the barrel nut, and give the nut wrench a tap with a rawhide hammer for the final tightening. My concern is that my muzzle brake will no longer be at the correct position, because it will be turned slightly. I have no idea if that will affect accuracy, or if I'm just being OCD. If the muzzle brake does have to be perfectly where it started, how is it adjusted? And if anyone has any editing they'd like to do to the way I understand head spacing, as I said, I've never done it, so suggestion are appreciated. Thanks guys