10-09-2014, 12:10 AM
Bob Prudhomme Wrote:John Lewis Wrote:Bob Prudhomme Wrote:Drew Phipps Wrote:As you know, FBI expert Frazier said the casing was dented when it struck the floor after ejection, and that the "ejection tests" they did (to prove that the spread of brass was not impossible) resulted in more than one shell being dented. My digital analysis software is on my computer at work so I'll get to it tomorrow.
Just another fairy tale from Mr. Frazier to add to his collection. I've dropped lots of empty casings on a wood floor and not one of them came out looking like CE 543.
It may have hit something else first. A dent like that on fired brass is not uncommon, especially on relatively think brass such as the type used on 6.5mm ammo.
JL.
Mr. McAdams...errr...Lewis
Please explain to all of us exactly how a cartridge case could be dented in this fashion, especially one as relatively "think" as the Carcano.
Pointing out typo's - very mature. You'll notice that I did you the courtesy of not pointing out yours.
Cartridge cases get dented like this all the time. I got the impression that you were a shooter? If you were then you wouldn't be questioning that fact. They get dented when the empty case gets flung from the rifle by the ejector. The extractor drags it from the chamber by gripping its rim near its base. The case is dragged over the ejector by the rearward travel of the bolt causing the case to pivot away from the rifle using the extractor as the pivot point. If the bolt is moved rapidly this can impart a substantial spin to the case - the part farthest from the pivot point moving the fastest. The part farthest from the pivot point is the mouth - which also happens to be a rather thin piece of brass. If that hits something it can get dented. It's as simple as that. Brass can even be dented like that by hitting the part of the rifle receiver on its way out.
This is all very commonly understood stuff to anyone who is reasonably well acquainted with firearms.
JL.