That is a great idea kudos on that but probably not real exact. Best way is to chuck the barrel up and dial it in on the tool to the bore then run a dial indicator on out side of the barrel. Kinda a same thing just solid so you can get exact measurements down to ten thousands.
Example: Take a bolt and a nut and screw the nut on. Is there any side to side play? You bet.. cocked to one side is miss aligned. When you run the can on and it bottoms on the threads it cocks to one side. That effects the stability of the round going through the can and effects POI.
I have seen POI from can on to can off of over 8 feet at 200 yards. He had a pretty bad thread job. After being repaired it was less than couple inches at 200.
Suppressor manufactures usually tell you to look down your bore for alignment problems and that will generally keep you from having a baffle strike and that is what they are concerned about.
The whole idea of this is to make you aware that there are things to ask and look for when having a barrel threaded or using existing threads that can make your experience a pleasant one or a bad one. Its up to you to decide what you want. Do you want to spend a 1000 bucks on a suppressor and stamp and then destroy it first time out or have it throwing bullets a foot left and a foot high at 200 yards compared to suppressor off. Some people are ok with that, some are not. That is for you to decide.
Here is a video on what I am talking about. Enjoy.
[MEDIA=youtube]7duvo7XLWIs[/MEDIA]
