Holding a 6" group from 0-25yds is good shooting, even extraordinary for someone who just started. There are several different aiming methods w/a barebow recurve or longbow, including gap, point of aim, & instinctive. Then there are subcatagories of these including split vision, stringwalking, gun barrelling, etc. Sorry, but I'm not skilled enuff to give you any pointers on the various methods, just be sure to keep your shooting form rock solid no matter how you aim.

Maybe someone will chime in w/more info for you, in the meantime it sounds like you're doing great!