No. A scientific test would be to do the same with an expanded case fired in that chamber and the primer pocket open, as would be in a over pressure situation.
Your "test" isn't testing real conditions.
Do the same "test" on any bolt action and the results will be similar.
And, a ruptured case will vent down the bore if the bore is not blocked.
Not quite David. If you put compressed air down the barrel of a Savage, the front baffle sends that air out the left and right ports.
Let me give you some examples of gas handling for the left raceway:
1. Mauser 98 - c-collar, and a 90-degree flange at the end of the bolt.
2. Savage - as mentioned front baffle, and a rear baffle on bolt.
3. Rem 700 - bolt nose inside of barrel breech.
4. Win 70 (newer) and MRC - baffle attached to bolt body that rests in left raceway.
