Looks like a fun day and great memories. Very nice rifle; I have read countless posts about how much people like their FX royale 400's. I have an FX Independence in .22 that I believe uses the same action and trigger, and has a very similar synthetic thumbhole stock. A great shooter.
My .22 FX Royale 400 is a bonafied tree rat killer - no doubt about it. I have a Nikon Prostaff EFR 3-9x40 scope on it. The Royale is shooting 21 gr H&N Baracuda pellets at an average of 845.5 fps, producing 32.48 ft-lbs of energy. I do head shots and that pellet flat out hammers them.