"Example - in IDPA you cannot reload while moving - and reaching for the spare mag, or release is starting the reload procedure. In other action shooting sports, if you are not reloading on the move, you will be slower than your competitors."
Wow, that was quick, already on new threads ric! Just to clarify, you can reload while moving as long as you are behind cover. The rest of the standard IDPA rules apply. If you are behind a wall and are moving to the other point of the wall and your gun is at slide lock, have at it. USPSA is simply more freestyle oriented because there is no differentiation between reloads and they may be done at any point in time without penalty. In my opinion, this places more strategy in the game since it's up to the shooter when to reload, along with emphasizing the technical skill of reloading a little bit more.