I'm going to jump in here and disagree a little bit :-). A short time back, I ordered a variety of "match" pellets because of all the fun we've been having with these comps. Unfortunately, I concentrated on the heavier end of the scale, 8-8.5 gr., which is fine with the S200 but not so good with the 853. So what I have on hand are: Daisy Avanti Match 8.4 gr., RWS R-10 8.2 gr., Beeman H&N Match 8.1 gr., and Crosman Premier Match 7.9 gr. I also had some RWS SuperMags, a 9+ gr. wad cutter, but not marketed as a match pellet. My results with the S200 were pretty dramatic. Shooting off the bench, the R-10 and the Beeman are both one holers at 10M. The CP's are almost as good, but with a tendency for flyers. And the Avanti's SUCK! I'm lucky to get all 5 touching, never mind one little hole. Best group with the Avanti's is somewhere around 3/8". Which is a real shame, they are a beautiful looking pellet, for those that haven't tried them, they are bright, shiny silver. So the upshot of all this is, even at 10M, pellets do matter. BTW, I've got the S200 shooting the R-10's right at 630 fps, seems like a near perfect velocity for this, and lots of shots on a fill. Later.
Dave