when you tune a fixed blade bh, is 20 yds far enough to see what your arrow is going to do or should you shoot farther?

I shoot from farther back than I intend to shoot at game. This tells me how well tuned I am. I shoot groups at 40 yds. Shooting groups at 20 just ruins too many arrows, though you can shoot at individual spots.

always shoot at the distances you feel you may be shooting at. Better safe than sorry when that buck of a lifetime is in your sights!

I tune at 50 yards, but it all depends on your shooting skills overall.