The CZ factory handbook recommends barrel cleaning every 250 shots for the S200 and I assume all PCP's need regular cleaning presumably because of pellet build up? I nearly caused a riot at my club when I suggested barrel cleaning, but I must admit I have not cleaned barrels on any of my springers unless I am stripping them. I confess to sitting before a bench with six different brands of pellets and checking to see if the 50 year old Webley/BSA barrel will group better with one pellet than with another! One major problem we all know about is the 50 year old .22 barrel and the modern 5.5mm pellet...now I have to worry about barrel conditioning!
Many thanks for the tip..I will get out the cleaning pull tomorrow.