I think he's asking if he can zero at 12yds in his indoor range, and simply compensate for a longer ranges by adjusting the sights. While you could make a rough estimation, based on the number of clicks needed to move POI a given distance, you'd also need to know the trajectory of the ammo being...
Very nice setup!
Try tripod mounting your camera, and turning off the flash. Then make sure your ISO setting is low (80'ish--this wil reduce grain) and use your timer to snap the pic. You'll end up with crystal clear images.
My pics were all taken with a lowly 8mp Canon point-n-shoot.
...it had to go. Excellent accuracy, but funky ergonomics forced me to change my natural grip too much. Thumbs up shooters have to hold your thumb way up to clear that pesky slide stop/release lever. The P239 would be fine for shooters that lock their thumbs down.
Back to the old standard Glock...
-You can adjust the sights to whatever point of aim you want.
-You can look at the manual and determine how many clicks on the sight it takes to move your POI at a given distance. However, the click settings on the rugers are not real "positive" so I'd verify by actually firing at the distance...