Not yet, figure I'll get to it one of these days.
The M8 6x36 on my 77/22 allows me to shoot close to 1/2" at 50 yards with its standard parallax.
I had a M8 6x42 on Mk XXII and it shot in the .4's at 50 yards with its 150 yard parallax. It now wears a 3-9x33 with AO. Not needed, but wanted to give that scope a whirl for sometime. May go back to the 6x42 some day ... I really dig that scope on that rifle.
If you're doing precision shooting it may be an issue, but for plinkin' and ground squirels its just fine.