westcliffe01
Well-Known Member
No. The neck OD is determined by the chamber. The throat is the first part of the barrel after the chamber where the rifling is tapered. If the throat is slightly too large (50um too big would already be a problem) the first part of the barrel after the chamber would almost certainly have no visible rifling at all.
Thank you for the tip with a heavy flat base bullet to test if throat diameter is too large. I'm thinking would it be possible to measure this diameter by measuring the throat diameter on a fired case?
I have not talked to my gun smith about the issue yet. We only have a few of those here in Denmark and the guy who made my barrel is supposed to be the best of them. He is also a old angry man who don't believe the customer is always right and he is not know to handle criticism well So I would like to be absolutely certain something is wrong before approaching him.