12-04-2014, 12:26 PM
Lauren Johnson Wrote:Different length?
Yes. While there appear to be too many rifling impressions on the bullet in the top photo, its length is correct at 30 mm, while the bullet on the bottom, at 28.5 mm, is too short.
The "nick" seen in the bottom photo is from the FBI removing a sample of bullet material for analysis.
The bullet in the top photo is also greater in diameter and, after measuring, appears to be the correct diameter for a 6.5mm Carcano bullet; that being .268" or 6.8 mm. It is greater in diameter than the bullet in the bottom photo which, when measured, is very close to the measurement of 6.65 mm that SA Robert Frazier gave to the WC in his testimony; and mistakenly reported equated to .267" when, in reality, 6.65 mm equates to .261811". As I pointed out earlier, there are no bullets manufactured that even come close to .261811", although a bullet 6.7 mm in diameter would translate to .263779 or .264", the standard diameter for all 6.5mm calibre bullets except for the 6.5mm Carcano, which requires a bullet .268" (.2677") in diameter.
The rate of twist of the rifling in the top photo appears to be even faster than the rate of twist of the rifling in the bottom photo, which worked out to 1:7.63. As I stated earlier, the 6.5mm Carcano short rifle had standard twist rifling with a rate of twist of only 1:8.47. I will work out a ratio for the riflings in the top photo later today.
As for similarities, the land impressions in both photos measure out at the incorrect width Frazier gave to the WC of .070" (1.778 mm), as opposed to the correct width of .085" (2.159 mm). Both bullets appear to show 18 ridges in the cannelure band towards the base of the bullet.
Mr. HILL. The right rear portion of his head was missing. It was lying in the rear seat of the car. His brain was exposed. There was blood and bits of brain all over the entire rear portion of the car. Mrs. Kennedy was completely covered with blood. There was so much blood you could not tell if there had been any other wound or not, except for the one large gaping wound in the right rear portion of the head.
Warren Commission testimony of Secret Service Agent Clinton J. Hill, 1964
Warren Commission testimony of Secret Service Agent Clinton J. Hill, 1964