most sites are 500fps for bolties, with a minimum engagement of arbour 15-20m (site dependant)
and yes, at 500fps with a heavy BB it will pierce a can of coke at 50 ft (not meters) but you have to remember you aren't getting rinsed at 30 rounds a second by it, so it is 1 single sting.
unless you are in ireland, where 328fps is the legal limit before they are counted as airguns (or something like that)
heavier BB's with just travel more accuratly, but slower, they reach to basically teh same distance (at 450fps on .2's a .3g BB is going to go the same distance and hit within a considerably tighter grouping)