what is causing my arrows to keep drifting to the left the further back i shoot.at 20 im on the mark,at 30 im 3-4 inches left.at 40 im off the target.im puzzled.what are the possible problems?

Possible problems are out of tune bow. Head to the shop for some paper tuning.

Center shot or grip torque. You need to tune your rest. If it keeps shooting to one side the farther back you go move the rest a very little bit in the opposite direction.


Paul

Possibly not holding the bow level or your sight is not level with the bow.

Most likely it sounds like the centershot is too far left. Do a search here and look for walk-back tuning.

The reason your arrows hit dead on at 20 yards is because that's the distance you adjusted the sight for.

I'd say center shot too and a good reason to have a micro adjust rest. There's a guy I enjoy who gives a good description of how to take care of the problem that you can find on the web. Goes by Alans Archery. Very down to earth about archery. Good tuning advise.

If you are holding the bow level , then center shot is suspect . Too stiff a spined arrow "may" contribute to this , but that would be my last guess .

It sounds to me like your center shot is not correct. You can cure this by walkback tuning. Draw a perfectly verticle line on the target and shoot one arrow at the target at 10 yds. move back 10 yad repeat, move back 10 yds. You already stated the arrow drifts. move the rest (in small incriments) the way you want the arrow to move and repeat. You will most likley have to move you sights in accordance.