I would think that that would show on either the bullet or the neck on the cases that were removed.
A Sharpie to the bullet, neck and shoulder should clear that up pretty quick.
“The enemy is anybody who's going to get you killed, no matter which side he is on.” ― Joseph Heller, Catch-22
Beware of associating with "Cheap" Squirrels. They tend to be very narrow minded, hypocritical, and will gag you if you question or disagree.