ANSI website may be helpful, but that's dicey. You may want to email paintball insurance companies as well. They probably won't have test methods readily available, but may be able to point you in a much narrower direction.
WTB ALWAYS CASH IN HAND: HSW Shoebox Shocker and HSW Impulse
412KREW MSXL and NXL
"What is to give light must endure burning." -Frankl