Re: Leupold 8.5-25x50mm Long Range: Target vs M1?
M1 or Target Turrets - both are reliable and accurate, probably to about the same degree. Not sure if the innards are the same as used in MK4's (Leupold's toughest tactical scope) but the dials are very similar.
Biggest difference is ergonomics, the M1's feel better, easier to manipulate, feel stouter, don't need caps as they are very well sealed. M1 pretty much restricts you to mildots (except for the duplex in the 3.5-10 & 4-14). Long Range Target offers a fine duplex or target dot.
I believe that once you use M1's you will stay with them.