Haven't got the figures to hand but some chrono testing with my modded HW30S showed R10 (pistol) to give the tightest fps readings with Hobby pellets not quite as consistent but still respectable. Used exclusively for 10m/Bell Target shooting, I'd say the accuracy of both was pretty good but I'm the limiting factor in those tests.

However, Bisley Practice were absolutely terrible through my barrel with a string of 20 shots varying over 100fps high to low. Never seen a gun react so badly to a particular pellet since I tried those Prometheus things in my HW77 in the '80's.

The same tin of pellets work ok in other guns so that makes my 30 at least pretty pellet sensitive but then, the 30 isn't as well made as Weihrauch would have you believe.