I have a Ruger Frontier in 308. It is essentially a compact (actually, the predecessor) with a rail on the barrel for mounting a scout scope. Last year, I hunted with it using the scout scope. With this scope, it would shoot about 1 1/4" 3 shot groups with Hornady Custom 165 gr. at 100 yards. Even though I took a deer with the gun, I decided I did not like the scout scope.
This fall I changed the scope to a Burris 2-7 x 35 Fullfield with the E1 reticule. With the $14/box 150 gr Federals from Wally World, it was shooting (best group) 3/4". I left it sighted 4" high. This put the Hornady 165 gr at 3", which is exactly where I want it since I intend to hunt with the 165 gr. No windage adjustment is necessary between these two loads. If I run out of the 165's, I will just dial the elevation down an inch and use the 150's. I have several boxes of each in the same lots.