I have found about the same results as Evan in my 22 caliber rifles. With the exception of the 88g in my 22/250 AI . Groups were better 10 thou in the lands. 75s and 80 were as described above.88gn is very flexible in my 22BR. It seems to like 0.065" off the lands alot:
http://forum.accurateshooter.com/threads/my-new-22br.3981971/#post-37532253
I've also seen similar performance at 0.010" thru 0.020" jump too. It never liked to jam though; groups never got as small.
2750fps and 2975fps were nodes with both Varget and IMR-4350.