And how exactly do you think higher velocities are achieved? oh yeah theyre usually associated with higher pressures and when i messed around with GRT and duplicated s&bs ammo it was in +p pressures.You don't need to modify anything right now. All you need to do is leave them loaded and go shoot the thing. It's not broke until it's broke, and right now it's not even broken in...
Well for starters, +p ratings are based on a pressure threshold at +/-(X)% based on the maximum pressure of the proof round, not velocity at all. Plus ammo manufacturers love to bump their numbers up to sell more units. We could delve in to the physics involved, but something tells me you wouldn't be listening.