Please correct me if I am wrong here but if that was printed on 8.5" x 11" and in standard PDF then those are 1" grid blocks. With that in mind, thats a pretty spread out group of around 3.5" spread in your 5 shot string. At 100 yards, that is pretty awful. Especially locked in to a rest. I get better than that at 100 yards with my .50 caliber Hawkens with PRB and shooting with a mono pod.