Perhaps you should try a different arrow. Maybe go with something a little bit stiffer. Maybe the new strings gave you a little better performance than the old strings and now your current arrow is a bit weak. YTou could even try the same arrow but instead of blazers use 4" vanes just to increase the weight in the rear. Or you could turn the draw weight down to about 65lbs and see how that affects things. Actually turning the draw weight down might be the first thing to do as it's easy and can give you some immediate feedback.