You were correct. They asked for the rest of the shells and the spent cases. I will be curious to hear what they find.
If you have ever pulled bullets and weighed powder charges, the variation between cases may surprise you, therefore the difference in velocity you noticed. tho I`m surprised that, except for your first shot, clean barrel?, all velocities were over factory listed.
I would shurly not shoot any more of this box. Give Remington C.S. a call, if my experience holds, they will want the rest of the box for evaluation on their end.
Good Luck
