Relative Pellet Accuracy

To preface, I have no Olympic games ambitions. I've seen what it takes to earn that, and I'm not interested. The juice ain't worth the squeeze for me.

I've recently started shooting PCP air rifles to supplement my smallbore and high power rifle marksmanship, and understand that ammunition performance will vary.

When bench testing pellets on a 10 meter bullseye target with a pinpoint 10, how accurate will pellet performance vary in terms of scoring rings? Example: will pretty much everything clip the 10 point to some degree? Or will some pellets only be capable of 8 ring accuracy? How much more accurate can I expect R10's to be over bargain-basement wadcutters?
 
Due to the idiosyncrasies of airguns it's a hard question to answer. Some pellets might not even hit paper! Others might give you extreme accuracy, I'm talking pellets going through the SAME HOLE at 50 yards. Trial and error by trying different types, sizes, weights of pellets til you've found what works best is the only way I know of. Don't know if that helps or if I'm even understanding what you're looking for.
 
I like to shoot 10 Meter from a bench on my patio with a Daisy 853. While my groups tend to vary in size depending on the time of day and my level of activity, the RWS R10s and the Eley tenex in 4.51 & 8.2 grains (when they can be found) seem to shoot much more accurate than anything else I have currently tried. QYS along with the H&N Match seem to do fairly well also.