I have been shooting bows since I was 6 but up until a year ago have been doing rifle hunting and am going bow hunting. What is an acceptable archery group? I have a Red Wing Hunter recurve bow and am shooting 1 inch groups all within a 3 inch circle of the bullseye at 20 yards. Is that close enough to the bullseye? I have thought about getting a stabilizer but My threads are 5/16ths instead of the standard 6/16ths.