OK, I think this might have been discussed before, but I did a search, and couldn't find anything...
I read that a 5.56mm has to be traveling atleast 2700fps to fragment properly and cause maximum damage. I have also heard it said that supressors slow bullets down to subsonic, though I also remember hearing it said that they don't slow the bullet, they just slow the expansion of gases at the muzzle end, so rifle rounds still emit the supersonic crack when supressed. So my question is, do 5.56mm rounds slow down when used in a supressor, and if so, wouldn't that basically mean that the rounds would almost never be at a high enough velocity to fragment?
Also, I have a question about the 6.8mm SPC. Is there any data on their wound profiles or terminal ballistics yet? Do they fragment, or just yaw, and how soon do they yaw? etc...
On the AK47, I have heard that the 7.62x39 loses stability after 200-some meters, so even if you aim high, it still goes off target to the left or right unpredictably. That's what I heard anyway, it could be wrong.
Speaking of AK's, I may have asked this before, but does the 5.45x39 round have the same range problems of 7.62x39?