Grabbed the 5X45AI, my name and I'm keeping it!, last night with a pocket of 39 grain BlitzKings for some Chucking last night. I was using them to limit pass through as the area was tight. First shot at 260 yards was in tall grass but was a gimme so I was already tallying it. Next shot was another easy one at 305 but it ran away! Oh well it was a pup so a small target I think. Mom follows and stops and gives me two shots and nuthin'! Another at 265 and it runs away! WTF moment and I return to my truck and grab my 6X45AI and went 3 for 3 from 306, 291 and 240. Today I went to the range and the 39's aren't making it to the target! Nothing but a poof! 4123 fps in a 8.5tw and 349,000 rpms was okay in the new tube but I guess not now! The 55's still make little groups so they will be my mainstay!