Is that little puppy like shooting a bb at Mach 2 or 3? Haven't seen one for real. Is it center fire or. Rim fire? I prefer cartridges that are reloadable and able to put meat on the table! It all goes down to shot placement! And practice! Besides that, most of us can't afford the "gun of the month"(or year, in my case)! I do have a .223(5.56 mm). Prefer .308, though, seems as versatile as any other caliber, of course, everybody has their favorite!
Hawkdancer