Elite Force Premium Biodegradable 6mm Airsoft BBs (Weight: .28g / 2700 Rounds)

"These are great bbs but when I got mine the bottle said .25 premium bbs not milsim max which is advertised in the name online, is there a difference between premium and milsim max bbs?

"So, I got these for Christmas last year, It's may now. I shot a few thousand BBs when I got them, and they still have not degraded. Of course, being Elite Force, these are great, especially for their price. They are very accurate, and look great. They don't degrade, though.