And while I haven't bought into the theory that he shot himself later (or other theories), you can't conclude that a bullet couldn't be switched. Couldn't one find a bullet after a trip to the target range? (I am not suggesting this is reality, only pointing out that you are jumping to some conclusions that are not in the report).
C. Sanchez was reported elsewhere to be the agent who was transporting Davilas and the bullet. So he couldn't have been the agent at the scene when they took Ramos's gun, unless I have a serious warp in the timeline.
And at the time Sanchez was transporting Davilas and the bullet, he didn't know which agent had shot at the guy, and which one had hit him, even if he could get his hands on a bullet to swap, he wouldn't know which bullet to swap.
It is clear now why Ramos stipulated that his weapon fired the shot. Everybody agrees Compean missed his mark, and Compean said in his first statement that he thought Ramos hit the guy, and another agent said the guy had to be helped into a van on the other side of the river -- there's little room for the "shot later", substituted bullet theory.
I will agree that I am trying, to the best of my ability, to substitute names back into the report based on other reports, mostly from WND, leaked about the case, and an "analysis" of the amount of space available in the document for names, and occasional edges of letters left visible.
And I think it is reasonable to infer that the three other agents who are accused of lying in the report are the three that have now been terminated (one resigned, two were fired).