I may be wrong, but idk if ive ever had to true my MV with 4dof. I seem to always input what my labradar says and its gucci. Barely move the AFF to line up the long range stuff and its been money. No saying some wont need to but it has been one of the closest to being correct off that bat that ive used. Like mentioned, edit rifle info, move the MV up or down to line up your corrections for the 500-600 and youre done.