I am in the process of finding a good combo pellet/slug and velocity for my AEA Challenger Bullpup .25. Today, while shooting a few 5-shots
groups I got these:



First group shot, 1" ctc, second group 3/8" ctc, third group 3/4". Same distance (32 yds.), same overall conditions. What can explain such a big difference between groups 1 and 2? Can something be concluded about the gun accuracy? These pattern of good/regular/poor groups repeat itself time and time again. Frustrating...
groups I got these:



First group shot, 1" ctc, second group 3/8" ctc, third group 3/4". Same distance (32 yds.), same overall conditions. What can explain such a big difference between groups 1 and 2? Can something be concluded about the gun accuracy? These pattern of good/regular/poor groups repeat itself time and time again. Frustrating...