For the time being I’m taking the view that I don’t know where any of the bullets actually came from. But I have a lot of opinions on where various bullets cannot have come from and are extremely unlikely to have come from.
A couple things I’ve been kicking around that I haven’t discussed with anyone/anything but Grok yet:
A bullet apparently travelled approximately 200 yards and pierced a 0.8" steel hydraulic line that has a thickness of 0.16". Grok is inclined to “think” that’s a tough shot for a basic FMJ .223 from a AR-15 with a 16" barrel, but is inclined to assume the bullet came from “Crooks” rifle, so it must have happened that way. Grok mentioned that bullets designed to penetrate lines like this generally have steel cores, or other cores that are made of very hard materials - not lead.
On the other hand, the bullet that hit Mr. Copenhaver in the abdomen apparently fragmented. He says that “the bullet” is still in his body, lodged next to his spine. Presumably the bullet didn’t hit any bones in his body before it hit his spine. (He’s lucky to be walking, IMO).
The bullet that hit Mr. Dutch (it does seem like he was only hit with one bullet) broke up ribs, plural. He described the rib pieces in an interview as being like a “bunch of tic-tacs”. He said the bullet fragmented. Some fragments remain in his body, at least one exited on its own.
Usually FMJ bullets stay in one piece unless they hit a more substantial bone than a rib.
Basically, the bullets that hit Mr. Dutch and Mr. Copenhaver acted like soft point or hollow point bullets, and the one that hit the hydraulic line acted like a penetrating round.
In Vincent Fusco’s film, Mr. Copenhaver said he had “proof” (almost certainly meaning proof of a second shooter) in his body. Whether that’s a larger caliber bullet, a different type of bullet from the basic copper/lead bullet the House committee said Crooks used, or if it’s a matter of the angle at which the bullet hit, I don’t know.
By the way we don’t know what kind of round “Crooks” used - full metal jacket, soft point or hollow point.