It would be a way to check manufacturing problems on the points. From the twist (you said a twist of ten) and the velocity at the muzzle, you would have the rpm. Testing it by spinning maybe 10% over that number would allow you to sort out the bad ones.

Some of the harmonics are related to stretch on the barrel as the bullet accelerates, so the heavier barrel resonates less.

Give those sick people my email, and we can talk about crazy things. I also spend more time messing than shooting because I need to be close to her, in case she has problems.

Science has always owned me, and a few times; I've been lucky and owned science! Several patents resulted....

👍💗🤠🎉