Greenarrow, nice shooting. Don't you just love these HW guns? How fortunate we all are with ever tightening regulations on firearms that there are such wonderful, accurate air guns to use anywhere for pennies.
Regarding pellets, my wife's HW30 and my R7 really like H&N FTT's in 4.50mm but hate them in 4.52 mm, lol!
The 8.49 gr. H&N Sniper Mediums also shoot great in my R7. I tried them because they are similar in design to the 10.34 gr. AA field heavies which shoot as fabulous at 19 fpe as they do at only 11 fpe. The Snipers delivered, but their skirts are very thin and you almost need a pellet seating tool to seat them and smooth the skirts. Not sure if Sniper Mediums are still available.