06-04-2014, 07:49 PM
(This post was last modified: 24-05-2014, 01:22 PM by Bob Prudhomme.)
The next problem with CE 399 also involves the land impression left by the riflings of the rifle that fired CE 399, seen again below:
![[Image: attachment.php?attachmentid=5764&d=1394312818]](https://deeppoliticsforum.com/forums/attachment.php?attachmentid=5764&d=1394312818)
My search for specs regarding Carcano rifles led me to the Italian Firearms Forum of a gun collectors website, where a collector with access to Italian military specs was able to answer almost all of my questions. He is the chap who supplied me with the correct Carcano lands and grooves measurements I used in the last post.
It turns out that the rate of twist for the riflings in Carcano I have been using over the years are not quite accurate, and most have been rounded off to the closest whole number.
For those interested, the rifling specs are as follows:
Lands and grooves widths: All Carcanos (6.5mm but not 7.35mm) Lands = .085" (2.159 mm) Grooves = .125" (3.175 mm)
Riflings:
M91/38 6.5mm short rifle (LHO) = Standard twist rifling, rate of twist 1:8.47
M38 7.35mm short rifle = Standard twist rifling, rate of twist 1:9.45
All carbines (pre- and post-1938, except M38 carbines) = Progressive twist rifling, rate of twist 1:15.3 - 1:7.48
(this does not include carbines such as the M91/24 made from cut down long rifles)
All M91 long rifles (except M91/41) = Progressive twist rifling, rate of twist 1:22.79 - 1:7.94
I had arrived at a figure for the rate of twist of the riflings in the rifle that fired CE 399 but, now that I look at my methods, I am not happy with them and I will be doing it again.
If there are any members with experience in graphics who want to have a go at determining the rate of twist on the land impression seen on CE 399, I am more than happy to accept assistance. If the rate of twist seen on CE 399 can be accurately determined, it will be further proof of whether or not CE 399 was fired from a 6.5mm Carcano rifle, or any other 6.5mm rifle.
My search for specs regarding Carcano rifles led me to the Italian Firearms Forum of a gun collectors website, where a collector with access to Italian military specs was able to answer almost all of my questions. He is the chap who supplied me with the correct Carcano lands and grooves measurements I used in the last post.
It turns out that the rate of twist for the riflings in Carcano I have been using over the years are not quite accurate, and most have been rounded off to the closest whole number.
For those interested, the rifling specs are as follows:
Lands and grooves widths: All Carcanos (6.5mm but not 7.35mm) Lands = .085" (2.159 mm) Grooves = .125" (3.175 mm)
Riflings:
M91/38 6.5mm short rifle (LHO) = Standard twist rifling, rate of twist 1:8.47
M38 7.35mm short rifle = Standard twist rifling, rate of twist 1:9.45
All carbines (pre- and post-1938, except M38 carbines) = Progressive twist rifling, rate of twist 1:15.3 - 1:7.48
(this does not include carbines such as the M91/24 made from cut down long rifles)
All M91 long rifles (except M91/41) = Progressive twist rifling, rate of twist 1:22.79 - 1:7.94
I had arrived at a figure for the rate of twist of the riflings in the rifle that fired CE 399 but, now that I look at my methods, I am not happy with them and I will be doing it again.
If there are any members with experience in graphics who want to have a go at determining the rate of twist on the land impression seen on CE 399, I am more than happy to accept assistance. If the rate of twist seen on CE 399 can be accurately determined, it will be further proof of whether or not CE 399 was fired from a 6.5mm Carcano rifle, or any other 6.5mm rifle.
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