I would suggest taking the bow to a proshop and have them laser the center shot and check your draw length. I have and old Bear Black Lightening and I was haveing the same problem until I took it to a proshop and had a whisker bisket QS and a peep sight...had it set up with a laser and my groups at 40 yds are now about 6" which is much better.....the draw length on my bow is a little long for me and has been adjusted down as much as possible. I am sure if I could get the draw length were it should be my groups would be even better.....but the laser set up was very inexpensive and well worth it....hope this helps..........some of us are stuck with the OLD stuff for now..lol