I smoked a few Sierra hp bullets with my 220 SWIFT some 42 years ago. It showed up as black speckles around the hole in the paper at 100yds at 200 meters it was a black smudge if and when I could find the hit. I'm not buying this one though, 3200fps is not fast enough to burn up a bullet. Maybe the plastic tip, which is why hornady changed to a different compound in the first place. They needed the tip to be more heat resistant, so they dropped the AMAX and replaced it with the.ELDX. is this guy shooting an old batch of amax? Sounds more plausible than barometric pressure and humidity to me.