19-04-2014, 03:15 PM
It appears at least to me that the visible rifling at the upper left corner of the cast looks like it starts out pretty much at the same angle that appears on our bullets. If it was a gain twist barrel wouldn't the spin at the throat be much shallower?
Found some more weirdness. In the NARA photo of CE 569, the scale is 14 pixels to the mm. Since the bullet jacket is positioned at 45 degrees angle, I had to add some Pythagoras to do the land measurement. 14 (diagonal) pixels wide x SQR(2) = 17.8 pixels/14 = 1.41 mm or .056 inches. This is smaller than Bob's specs for the WCC bullet (.085) and also smaller than Frazier's WC testimony (.07). In addition, the diameter of this jacket appears to be close to 7.5 mm which is much larger, but I suppose it could be flattened There isn't an end on view.
Somehow, though, the portion of this FMJ is matched to Oswald's rifle "to the exclusion of all other weapons."
Found some more weirdness. In the NARA photo of CE 569, the scale is 14 pixels to the mm. Since the bullet jacket is positioned at 45 degrees angle, I had to add some Pythagoras to do the land measurement. 14 (diagonal) pixels wide x SQR(2) = 17.8 pixels/14 = 1.41 mm or .056 inches. This is smaller than Bob's specs for the WCC bullet (.085) and also smaller than Frazier's WC testimony (.07). In addition, the diameter of this jacket appears to be close to 7.5 mm which is much larger, but I suppose it could be flattened There isn't an end on view.
Somehow, though, the portion of this FMJ is matched to Oswald's rifle "to the exclusion of all other weapons."