Just a hypothetical question, not suggesting that anyone do this.

In an AI chamber you seat bullets long, a slight jam to keep everything stable. Then when the round is fired the shoulder is blown forward and the angle changed.

Any reason you couldn't do something similar with a standard round by intentionally setting the headspace on the long side?

For example, say you had a "go" and "no go" guage for caliber x. Instead of using the "go" gauge to headspace the barrel, if you used the "no go" gauge, and then used scotch tape as if using a "go" gauge, wouldn't you esentially create a semi-wildcat with slightly more case capacity, the same shoulder angle and a slightly shorter neck?