My 2027 likes RWS R10 wadcutters 7.0 gr 4.51mm diameter.Sometimes it puts 10 of 10 pellets into 1 ragged hole at 18 yards at 580fps average.
Every time I shoot this 2027 it puts a smile on my face due to how many shots I can get out of the smallest 50cc air tube of any gun I own.