I had an old original (to the 1973 gun) Bushnell Sport view 4X scope, with those evil shoot through rings, that would consistently allow me sub moa groups at 100 yards. After stripping the old 336 down, re-finishing, and mounting low rings and a Nikon Prostaff 3-9X, it grew to 1.5 moa .... but that's with my re-loads. Guess I need to try the old factory Rem Core Lokt 150's again. I do like the Nikon Prostaff for the optics and the basic value for the 30-30.
I do like 2-7's but I just set them on 3 for hunting and forget about the rest. At 3x a 2-7x32 has a 10+mm exit pupil, allowing faster sighting. 1.5-4.5 is plenty for any shot out past 300 on antelope and bigger. Let's see an antelope at 300 yards looks like it is 75 yards away through a 4x scope, if you can't hold on an antelope at 75 yards you need more practice. I've been very happy with Nikon scopes on several rifles, I can't comment on the Crossfire.