
Like they said, similar., whatever that means.
Here is what Donahue said about Posner's claim (all emphasis is original):
2 Dear Mike: Sept. 11, 1996
Concerning the case with the damaged lip. Posner claims it could have held a projectile at that time. Let me explain something about Posner. He will tell you anything to make a point. There were no shells dented in that manner by the HSCA. I will refer you to Professor Thompson's book, Six Seconds in Dallas, page 144, exhibit no. 543. Dr. Thompson discovered this case had been fired (dry fired) at least three times. He also tried to dent the cases by throwing them against a wall, to no avail. Just to prove this, I am enclosing a fired 6.5 mm Carcano case. Throw it around any way you wish and try to dent it. These cases are very strong. It could have only been dented by feeding the case into the breech of the gun with great force. This would be from the clip. . . .
In closing, I have never seen a case dented like this. Dr. Thompson never saw any cases so deformed. So Posner says the HSCA had several empties dented like these??? Thanks for your interest—please keep in touch. Howard Donahue, Firearms Examiner