Alright I think I'm in the right section for this I have a vx3 with m1 turrets and mil dot reticle it is a 6.5 x 20x40 and also have a brand new mark 4 which is a 4.5x14x50 it has the duplex reticle. The intended rifle is a savage lrp 6.5 creedmoor. I'm torn between which one to use I rarely shoot past 600 yards but when I do it's out to around 850 yards. My questions are will the mark 4 have enough magnification to do this, and is the mil dot reticle that big of a help? I would just like some input from the more experienced people here and I have weaver tatical rings on it now they are the high spacing if I went to the 40mm objective what spacing rings would I need and are there a better choice without breaking the bank? Thanks guys for any help.