Circles indicates that your out of tune for both spine and nock height. If it is a hill bow with a standard cut short of center shelf you are overspined by quite a bit with a 400 shaft. Try 200, 250, and 300 grain heads. If they don't work you're going to have to drop arrow spine. Let us know what your shelf is cut to. It may require a drop to a 600 spine shaft. I shoot 600 spine shafts with a total of 400 grains up front from a mild R/D longbow that is cut 3/16 short of center. The bow is 55lbs at my 30 inch draw.
Cut to center or past center bows can shoot higher spine shafts, cut short of center bows need a much lighter spine.