FX No Limits and Scope Zeroing advice

I had issues running out of elevation adjustment shooting my FX500 at 100yds after being zero'd at 60yds and then dialing it in to 100. Did a little shimming which took care of that but I want to try some FX mounts instead. Here's the question, with the FX NL mounted and I want to keep 60yds as my home zero should I find the reticle center by counting total clicks available going back 1/2 of that, and then use the NL's to zero at 60? Is there a better way of finding reticle center other than counting clicks? 
Jimmy
 
What your talking about is called finding "optical zero". One way I've seen and used to find the optical zero of my scope is to use a mirror. 
Take your scope off and your caps (unless you have a small handheld mirror). Hold the scope up against a mirror and look through it. It will be very dark but, you should see 2 reticles. Adjust your turrets until the two reticles line up. You have just found optical zero. 
Tom
 
Look into the dial adjustable HHA Optimizer instead of using the FX. You can set your zero at any distance you want with the HHA and return to any zero you mark in less than a second . The HHA has a speed dial and on the speed dial there is a blank tape with a metal bar rhat hovers over the tape you just adjust the tilt of the scope till your cross hairs line up with your pellet and mark it on the tape so you can go back to that zero distance any time in just a second . You will be able to keep your scopes turrets centered for the most accurate shooting . I have it on my Hatsan 125 sniper 22 cal springer and I will never take it off .