to summerise the above...argue niggle tuttle fart lol
the bit about depends on your gun is the first step, but distance is the next concideration, over the next few weeks try one tin at a time, reason, some pellet/barrel combo;s need a cleen barrel (use a pull through inbetween each one then watch out for any diference as you go through the box of 500/200..watever) some need to be bedded in,,(500 is about right to see btw)
something to keep your eye open for is the sticker on the back of the tin ending inn something like 50,51 52 etc, some pellets feel like they should be a lot better,