RE: 40 yard shot
Only you can make that decision. The odds of a not so perfect outcome go up rapidly, the farther out you go. Even with a fast bow, 40 yds is a long way...and alot can happen. I personally try and get a 25 or less, although I have made some longer shots. I did shoot 2 deer at 40 & 42 yds. Both I had already shot, and they were shots to finish them off. I personally would probably not take a shot past 30, (unless it was needed like those 2) even though I practice and am accurate out farther than that.