That is pretty decent shooting but not unusual for a Marlin Model 60. I have had 2 and they would both do that well. But one I had didn't ever feed right. It went to the gunsmith 3 times but no avail. However the other one was a gem and it shot any brand of ammo well and really liked the hi velocity stuff. MArlin Probably make the best cheap .22 right now (although the savages are great too).
I actually just did some quick mental figuring and I have 8 .22 rifles!!
Can't have too many
okcmco