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Very nice rifle. I really like the walnut stock. Looks to be in overall very good condition.
Your sling is on backwards however. The bigger loop should be at the front, and the small loop and quick...

1. With a cleaning rod from the breech, make a mark or put a small piece of tape on the rod at the back of the bridge. Make a flag with tape near the back of the rod. Push the rod through the barrel...

Interesting. I've never seen a separation at the shoulder end.
Maybe something with the factory annealing? That's about where it would end.