Several months ago I bought a G17, and I've been practicing with it rather regularly at a nearby indoor range. I learned about the GSSF and have seen some clips of various matches, so I decided 'what the heck' and am planning to make my first effort at competitive shooting in a couple of months (in the Senior category, soon to be Super Senior). My question is this - since I can only practice at an indoor range on one target - should I continue to concentrate on hitting the center of a standard target at various distances? To simulate Glock the Plates I've been using an 8" diameter target at about 33' trying again to get to the center. (At 25 yards, my work leaves a lot to be desired.) And how do you tell where the rings are on the target that GSSF uses?