Originally Posted by Lycan
Update: I did a chamber casting tonight and I can see traces of the lands the whole way back to the casing on three of them.
Chamber and throat is clean.
I think I found my problem.
It sounds like to me that Mickey Mouse did the chambering job when you got it. That certainly sucks, but all is NOT lost. You probably can have it " set back" a half inch, and have someone Reputable rechamber, and use a new finish reamer, and you will be all set. It puzzles me as why it was as accurate as it was in the beginning. With the round count being as low as it is, I don't feel as though the remainder of the barrel is hurt. Assuming you had a 26 inch barrel , you still will have enough remaining to get good velocity. What a shame though, a obermeier barrel to boot. It's definitely worth the repair attempt. A friend of mine had a 300 win mag " set back", and it is way more accurate then what it ever was was. Velocity loss was negligible.
Just make sure the NEW smith uses new reamers, and minimal free bore.
Hope everything works out for you. It's amazing what the chamber cast can tell you.