You're a liar and a Stupid one at that.... You admit you made a mistake, when you said ......
"No, it is very specific. The nomenclature does not change because you don't know what you are talking about. The "land impression" on the bullet fragment measures approximately(.07 inches) 1.8 mm. The "groove impression" measures approximately(.13 inches) 3.3mm. Because you can't read a ruler doesn't mean Frazier could not. If you can read the "land impression" is 1.5mm it is only because you want to. Frazier made a Sulphur cast of CE 139's barrel he knew exactly the dimensions of the rifle's lands and grooves."
The rifling grooves do not leave a deep impression on the projectile makes light contact with the barrel when the projectile is fired.....because the diameter of the projectile is the same size as the barrel......ie; The rifle is designed to fire a projectile that is 6.5mm in diameter, and that's the inside diameter of the barrel.
You clearly didn't know that the LANDS in the barrel create the GROOVE on the jacket of the projectile ...... And you have demonstrated that you're too stupid to use the scale in the photo.
Let us see. On one hand is a certified firearms experts who testifies in court and he refers to it as a "groove impression", on the other hand a complete flake who knows absolutely nothing about a firearm who is randomly talking about grooves and oblivious to the fact the lands are one width and the grooves another.
Maybe look into what impression means. Frazier obviously felt it was important to properly refer to it. I think I will refer to it as a "groove impression" because that is what the expert refers to it as.
Mr. FRAZIER .....The width of the
land impression is 7/100ths of an inch, that is 0.07 inch--whereas the width of the
groove impression is 0.13 inch, or 13/100ths of an inch.