Here's another article I thought I'd post up just as a reference for folks - http://www.dtic.mil/dtic/tr/fulltext/u2/a519801.pdf .
And this one - http://stevespages.com/pdf/5_56mm_military_info.pdf
One of the things that's been discovered with the military FMJ loads since we've been using it a lot more in close quarters situations over in the Middle East, is that the fragmentation mechanism, it's primary means of terminal performance, can vary a bit at shorter distances due to bullet yaw oscillation which affects the angle of impact.
Assuming one assumes sufficient fragmentation velocity for the anticipated use, we can either switch to the longer, heavier bullets with a more reliable shorter "neck" and fragmentation in the target (hence the 75 to 77 gr OTM bullets), and/or increase the statistical likelihood of the bullet striking at an acceptable angle by firing controlled pairs. At least, that's what I get out of articles like this.
When we start talking about expanding ammunition (like the subject of this thread), that brings in lots of other variables. Hopefully this isn't too far off topic.
It seems like there should be a, "if you give a monkey a rifle," joke in here somewhere.
And this one - http://stevespages.com/pdf/5_56mm_military_info.pdf
One of the things that's been discovered with the military FMJ loads since we've been using it a lot more in close quarters situations over in the Middle East, is that the fragmentation mechanism, it's primary means of terminal performance, can vary a bit at shorter distances due to bullet yaw oscillation which affects the angle of impact.
Assuming one assumes sufficient fragmentation velocity for the anticipated use, we can either switch to the longer, heavier bullets with a more reliable shorter "neck" and fragmentation in the target (hence the 75 to 77 gr OTM bullets), and/or increase the statistical likelihood of the bullet striking at an acceptable angle by firing controlled pairs. At least, that's what I get out of articles like this.
When we start talking about expanding ammunition (like the subject of this thread), that brings in lots of other variables. Hopefully this isn't too far off topic.
It seems like there should be a, "if you give a monkey a rifle," joke in here somewhere.
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