Also too, when a bullet takes off through the barrel, it gets cut by the riflings which can have sharp edges which creat friction where as a piston in a cylinder would be incredibly smooth and really not need the reduction in friction like a bullet would.

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If you can still see the disapointment on his face in your rear view mirror, he's not far enough behind.
98 M3 Sedan blk/blk Sold
00 BMW 540i Sold
03 BMW 4.6IS
98 BMW E36 M3 modified