Cold Bore Shot?

[BjornF16]

A simple solution just before hunting day would be to go to the range, fire a few shots, and leave a round that was fed by the magazine in the chamber for hunting day. That way, the round in the chamber should go where you want it to. Even though I always treat all guns as if they are loaded, I would still put a card on the rifle noting that it has a loaded chamber and to leave it alone.

What is the purpose of leaving the round in the chamber from day before hunt?

Why not just place however many shots needed to foul the bore in the magazine, and load fresh the morning of a hunt?