I need a new scope for my .308. I use it for shot out to 600 yards. The popular method seems to be zero at 100 and click up for the rest. I was cosidering a signature model in 6-24 power with the target turrets. What I need to know is are the clicks repeatable and basically if it's any good? Or should I stick with Leupold? I tried a Tasco target scope first and the elevation turret broke (POI kept dropping) and it developed a blotch in the upper left quadrant. This was during the break in of the rifle!!! Sent it back to Tasco and after a couple of months and nasty phone calls(from me) I supposedly upgraded to their Tactical model, but now the AO is messed up. Anything above 20x won't focus at all and anything below focuses about twice the actual distance. I'm losing valuable shooting time and I want a reliable scope. Can I get it done with the Burris? Many thanks.