I have a few pictures of a high end revolver that the cone and rifling was worn off center with around 300 factory loads and hand loads with mag revolver bullets at below 55,000 psi. The throats were also worn off center from a too tight cylinder forcing the bullets off center.
I re-cut the cone but you can still see ripples at the rifling that was almost worn away at that point.
Look at the black areas in the throats after I cleaned up the cylinder. It is about .003" wear. The wear is in a different place around the chambers showing the chambers are not in line with the bore.
Those locked up tight as a drum cylinders with line bore chambers can give you grief.


Then what the gun did before and after I worked on it, 50 yards.