I have a 3-10x Bushnell Elite Compact on one 6.8 SPC, and a
Nikon Buckmaster SF 6-18x40 Mil-Dot on a 6mm WOA, and
as soon as the mount arrives, a Vortex Viper HS 2.5-10x44
on a LR-308. I go one of two ways. For tactical or short
range rifles, I go with a tough red-dot sight, co-witnessed
with a set of Magpul MBUS(Gen2) pop up sights. For long
range or medium range precision I prefer optics that are
sturdy, in the 2.5-10x range for medium range(