Re: Leuopld M1 or M3 adjustments
M1s are tall .25 MOA turrets.
M3s are medium height 1 MOA turrets.
The M1s are more precise, but slower. The M3s are faster, but less precise.
M1s are tall and can sometimes snag, but are easier to see from behind the rifle.
I highly recommend M5 if you're going with Leupold. M5s are .1 mrad and are in the some units as the reticle.