[ujiro]

But you are not thinking the right way. How it reacts when it hits your hard paintball mask is different than how it would when you yourself are struck with it, or breakable glass, etc. The paintball goggles are essentially ballistics rated. So obviously none of the BBs will be able to crack or penetrate it. The only way it is going to is if your gun is hot enough, not what BB you use.

But, different BB materials can behave differently in a collision with your flesh. That is what the safety concern is. Nobody said that BBBMax magically impart your AEG with higher muzzle energy capable of penetrating/cracking paintball or ballistics goggles.