Devil advocate here but when for a biggame hunting rifle where my long end of range is 500 yards I see no need for the additional mag. 9 or 10 upper end has worked for me well. Off a bench the extraX's is nice but in the field holding even 9x steady can be difficult here on the prairie's. On paper or varmits where the target size is shrunk considerably sure but there are still times where high mag/conditions don't work in this application either, requiringoneto power down.Also being the majority of the time in the middle x range of a variable scope when hunting I just don't see the need to spent the extra money on touch more mag. that may only see use off a bench. Again just my opinion.