I was sitting around and had nothing to do. I started calculating the ballistics on different 22 bullets from the website below but did not know the answer to the following.

Does anyone know the height of the stock iron sights from the bore of the barrel?

ShootersCalculator.com | Ballistic Trajectory Calculator

Just did a measurement from the center of bore to the top of the front sight and it is 2.5 inches. Can anyone confirm this for sanity check?

I'd think that 1 MOA is always 1 MOA - regardless of caliber. You may just need to move more clicks for .22LR. So if you're certain that one click is 1/2 MOA, that's all you need to know. Let the ballistics software determine the number of clicks.