On my last build I put a Burris 30 mm LRS 4.5-10 scope. Its an AR 15 chambered in 20 LBC, which is a 6.5 Grendel necked down to .204. Even in open country I carry it at 4 to 5x so targets are easy to find. I can always crank the magnification higher for far away shots. I'm putting an Alpen 6-24x50 on my next build, a 6mm6.8SPC but I don't have the barrel yet, so I can't give a recommendation. My 17hmr squirrel guns have Burris Fullfield II 4.5-14and Sweet 17 6-18 scopes, and both are good. The glass and warrantees are so much better than they used to be, that it's just a matter of choice. I do like lots of magnification on small critters like squirrels and PDs.