Details
Those that have been reading my posts know that I am not happy with the lack of accurate alignment of choke installations, since my first rude example was hitting about a foot off at 20 yards.
When I verified that with the shooter that had just bought that new primo screw-in choke barrel for his classic, and also saw a $7000 trap O/U with tubes installed crooked by the factory (about 17 years ago, and I think that much money could have gotten you a new Malibu), I knew better than to automatically expect decent alignment in ANY barrel.
A shotgun barrel with a mis-aligned, crooked threaded hole should not be expected to throw the best pattern, even if you could bend the barrel to make it hit closer to where you point.
The shot still has to change direction when being choked at the same time, and the force of re-direction is bound to increase the pellet deformity on that side of the shot column. No quibble will affect the physics of that situation, with the only point of conjecture being of the level of the perceived problem. Some might say "inconsequential" or similar, but don't say that there is "zero" effect.
Specific answers about a barrel may not be guaranteed, but I do expect that when I am deliberately putting the choke hole in straight, that you will have a better chance of satisfaction than when someone else deliberately doesn't seem to care about accuracy.
I can't say that the barrel will shoot perfectly straight, even though the hole is straight.
Remember, I didn't put on the rib or put the curvature into the barrel, if present.
The best test is for the barrel to be cut and crowned, then test-fired for point of impact verification, if that's worth the extra money for verification prior to the installation of the choke threads.
Let me know if you need more particular details.
See my previous postings for more insight from a gunsmith.
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