As most match pistols group almost as tight as match rifles from a rest (even the barrel lengths are similar!) and the pistol ten is 10mm and the rifle ten is 0.5mm, this is why pellets are not so critical on pistols and the geco's shoot well enough for pistol and will certainly group inside the pistol ten.
Good shooting
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?