RE: Hold-over or gradiated reticles?
Graduated recticles are a must for ML'ing IMO. With a rifle at 400 yds your only 15-18" low, easy because thats about deer sized. With a Ml its not uncommon to be over 40" low at 300 yrds and thats alot harder to "eyeball". The ballistic recticles can help, at long range you can lose 4" every 10 yds. Range finder becomes a necessity real quick. I havea burris ballistic plex on my ml and I love it, shots past 225 wouldn't possible (for me) without it. On my rifle, the marks are 200yds-1.5moa, 250yds-4.5moa, and 300yds-7.5 moa.(and hopefully soon the bottom post-11moa will be 340-350yds after some load tweaking.)