I had a really good case and batch lot # of Polar Biathlon that rarely threw big flyers, and SD wasn't too bad, and going 1107 fps, but it's gone now. I conserved it for matches and it lasted for 6 years. Back then I'd won some NRL22 matches with it. It averaged .26" at 50Y in J's 6x5.
Then two years ago I bought some Wolf ME. The ME is pretty good at 50Y, by that I mean plenty of sub 1/2" groups, a little over an inch at 100Y, and by 200Y it's falling apart, by 300Y I'll miss my cat shaped and sized steel a third the time and some big flyers happening.
I can hit the cat most of the time with my Vulcan 3 pcp which is a 1.2" gun at 100Y and as a comparison used to with the Polar as well which would do sub 1" at 100Y fairly often.
Though it's noticeably easier to hit that 300Y cat in windier conditions than it is with 22rf using those 25 cal .245 BC slugs.
I have a separate match barrel for swaged 42gr 22 cal slugs for my Thomas HPX and last time I was shooting at that cat in low winds I got bored hitting it so I put the rifle away since I was tired of shooting by then.
I also shot my smallest 5 shot group at 100Y with it as far as rimfire or air rifle goes at .1" tall and .3" wide ctc.
"IF" I had a pcp repeater that'd do sub 1" at 100Y, higher BC like .25 G1, 1050fps, and sub 2 SD, that would be pretty amazing! Might be a few more years before this industry can produce such a thing but it's heading that way.
Mike N of Thomas Air is a BR champion and he's shot 25 shot groups consisting of one ragged hole of .7" at 100Y with his swaged 38gr 22 cal slugs but his guns are single shot "all out" BR rigs.
BB guns have come a long way.
