There have been good and bad reviews on the 600 BDC reticle, I have one on my 1-4x20 and while the ballistic data isn't perfect I was able to figure out my own holdovers and it works fine.
Originally Posted by hockeyjr1
2-8x32 with BDC 600.
you correctly described it as a 2 to 8 power zoom by 32mm objective
Originally Posted by Sniper03
3X12 with 42 mm Objective.
not the most correct way to describe a scope
the scope has a zoom range from 3 to 12 and so it is typically shown as 3-12
then the objective dimension in this case 42mm and written as 3-12x42mm
a fixed power would be the a single power and objective
for instances 2.5x20mm or 36x44mm