never, you can always shoot better,

I am happy with my groups, release, and form but if you don't push your self than how are you going to get any better. I would say most people would be happy shooting the way I do but not for me. getting 5 arrows in the vitals of a deer at 20, 30, 40, or even 50yds is not that hard, I start out with a 3" circle once I can keep my BHs in that (20 out of 20) than I move back, and back, and back until I cannt any more and that is where i shoot from.