Since this scope (and most all others)is designed so that 1 click moves the reticle 1/4" relative to a target at 100 yards, at 50 yards it takes twice as many clicks to make the same adjustment. So if you want to move the bullet impact by 3" at 50 yards this requires you to turn the dial 24 clicks. However, since you mentioned that you already moved it a total of 16 clicks, you'd expect the bullet impact to move by 2" at 50 yards, which didn't happen. Sounds likesomething might be wrong with this scope. Or maybe since it's new it just needs some shooting in to get the erector tube loosed up a bit so that it adjusts properly.

I'm trying to think what I might do if I were you. I'd probably turn both dials several clicks, about 30 or more clicks each, and see what effect this has. If this has no effect whatsoever, you've probably got a defective scope.

And no, you don't pull up on the dial to make the adjustments. The purpose of that is so you can reindex the marks on the dial to aknown point after you've established your zero.

Good luck, I hope you get it worked out.