U are using better ammo than i usually use.
Trust me my usual choice is CCI SV. I use the expensive stuff for competitions and the like or when I just feel like shooting a really tight group. I have a couple of bricks of the good stuff left I guess. I have a case of SV and a bunch of other stuff some of which is even cheaper. I generally use that in my semi-auto rifles.
Speaking of semi-auto rimfire rifles. You guys that love your Rugers would really like a Marlin 60 IMO. That is unless you have heavily modified your 10/22's. My 60SS has bested at least two brand new Rugers when all the rifles were less than a week old. I've shot some very tight groups with my Marlin too using CCI SV. It loves the stuff. They are accurate rifles. They just aren't as accurate as bolt action rifles and it's accuracy the OP asked for. I've nailed squirrels right behind the ear from 50 yards with no rest at all with that 60SS. It was DRT too. And my old Marlin 60 is almost as accurate.
I do believe that true marksmanship is about being able to hit what you want to hit from off angles, with your feet out of position, with no rest and even when the target is moving. When I was learning to shoot my brothers laughed at me if I started to us a rest of any kind. I use one now though because of various health issues. It beats not shooting at all or not shooting very much. I still love to shoot and if I have to sit down and use a rest to do it that's what I'm going to do.