True Bore Alignment System

[Addley]

Alex

There's 3 problems with flexing a barrel to get it dialed. One is that some cartridges are long enough that the flex is in the chamber. Another is if you index barrels the flex will fool you as to where to point the barrel. But the most important one is that when your flexing the barrel its fighting the setup and when you start putting cutting pressure on it its far more likely to more during the process. The barrels should not be moving. So if you’re checking your work and finding you need to dial out a tenth or two after threading for example you have a problem. Most likely flex in the barrel is the issue as well as sacrificial metals like a copper ring in a 4 jaw. Thats a recipe for movement. Now I know someone will ask how much all this matters. I dont know and dont care. Im charging the customer to do the job to the best of my abilities, so thats what I try to do. For the hobby guy, this probably is not an area to fuss over too much.

Alex. What is the best way to chuck and line up a barrel for chambering?