CBH Australia
Well-Known Member
Not really. You can roll it on a piece of bar stock or a machinist's stone.
Myself I don't test measure concentricity but was pointing, just suggesting if you want to go that for testing it or more correctly measuring it.Depends on how exact you need to be exact.
I have enjoyed pretty good success detecting run out by using a dead flat pain of 24"x24" glass and roll each individually loaded round on it dead even at eye level under a very strong light. You'd be amazed how well out of round loadings show up.
I'd LOVE to buy a 21st Century CG but I can't justify the cost.
I could test it on a flat surface but that does not correct it or straighten it or give a measurable results for my records or corrections.
My point was more it's another step in the pursuit of accuracy and I've read some measuring tools have incoporate a way of straightening the ammo.
I wonder how important it is in the end of the rifle chamber is cut square and concentric to the bore. Ultimately this is the last place the loaded bullet is handled and the firing must set in sequence a whole new chain of events that put more pressure on the components than any part of the reloading proccess.
You could check concerntricy on the loading bench and mess it up in storage or transport.
Would loading a bolt action with a tight chamber tilt, or adjust the concentrity? Setting it exactly where the rifle forces it at the point before firing
I have a mate who found his factory chambered rifle was not cut square or true to the bore. He had a good gunsmith set it back and recut it.