Interesting Polymer Coated Bullet Findings and some more gun industry drama

[alamo5000]

I wonder if it was actual loss in velocity/pressure or people just jumping on the bandwagon

He proved that with FMJ or plated bullets the powder wasn't temp sensitive with a 50 degree temp variance. He also proved that with coated bullets it does happen. He was able to replicate it, but in doing so he showed that it wasn't the powder that was at fault.