Had a K4 on a Remington 742 30/06. Scope was great, shot a cow elk w the combo. Only sold it because I found the rifle uncomfortable to carry w the clip.
Friend has a 6X weaver, probably a K6 on his Remington 700 30/06 and has shot a lot of elk with that duo.
I also like the older Redfields, have a 3x9 on my .243.