It's tough to tell what's going on unless you can look at them up close and run your fingernail over the grooves, but I've tried to point out what's going on:
This picture is showing what appears to be one very wide land where the bullet didn't catch the rifling. The width of the line is where one ridge starts, spanning to the other side.
The top arrow points to where it looks like the bullet first hit the rifling in the throat, and the bottom arrow looks like where the bullet left the barrel.
I suppose this explains why my barrel was behaving like a 10 twist. The bullets weren't getting the full effect of the twist, as they were skipping the rifling. I think we have figured it out. I hope Douglas agrees and takes care of me on this. I am very thankful to all who have helped me along this frustrating endeavor.
Regards,
-Dan
Threaded Mode