Not to sound like I'm behind the curve... But exactly how does one fingerprint a bullit? Roll it in ink then roll it on a tiny fingerprint card? How long would it take to fingerpring a box of 50? Callifonia cant afford to pay it's cops... now another new bureau to fingerprint bullits?
I'm just kidding... But on the serious side... if they fire a round out of a gun, and keep it for the ballistic impressions to match with the gun later.... a few thousand rounds later they'll never get a 100% match. Useless evidence. Oh riiight... I forgot. California...