JASmith Wrote:The remaining issue is total penetration through timbers and hard targets. Here the useful metrics are the momentum and momentum densities which are the sectional densities multiplied by the velocity or square of the velocity.
If anyone is interested in bullet penetration, here is a link to a video on a test done a few years ago
http://www.liveleak.com/view?i=29d_1318009976
My experience in the 3d world is 5.56 punches through shanty town buildings with no issues (think Somalia), and .50 BMG/HMG has a hard time getting through some of the think mud walls (Afghanistan/Iraq). This goes back to the premise posed by LRRPF52 as to where we will fight...and I agree wholeheartedly with his assessment. Asymmetric urban environment in the littoral regions.

