Great! Where are the ?irregularities? from the rifle barrel?
As my example shows the copy of CE2637 we have is not of sufficient quality to see the required details but the original shows what appears to be a good copy of a human print.
I see no reason to doubt the findings knowing that an original most probably exists, the rifle still exists and we now have a high def copy of Days original day 1 Oswald palm print for comparison. I believe it's a little naive to suggest that The FBI would leave themselves open to such easily discovered deception.
JohnM