I have a Logun MKII .22cal as well. I have always used a Hill Pump w/ Dry Pack to fill all my PCP guns. Right now I have my Logun set up for JSB Exacts. My rifle also did real well with Crosman Accupels, but I haven't seen a dealer here carry them in a long time. I really like my Logun and I think you will like yours too!
Regards
Nathan