Nice gun but I'd expect a bit better accuracy too... Have you thoroughly cleaned your barrel before shooting for groups? Or was there a lot of wind that day?
I sometimes feel the sub 12ft lb rifles are holding back the accuracy of the .22…..I have almost the identical rifle only it’s the s510 xs Fac model also in .22 and it is scary accurate it will shoot air arms field heavy 18gr and the 16gr hades pellet on pellet at 50y all day it seems to thrive on the extra speed of the 32ft lb it is an awesome rifle
Either theres a problem with your gun or you haven't found the right pellet yet. My mate has the s510t which is the same as the sporter r and thats also not very accurate either. I have a s400 in 22 which loves the air arms pellets and can get 10 under 1cm at 30 yards. Also a hft500 in 177 which is pretty much all in the same pellet hole at 30 yards.