Below is some data from the new BH 5.56 mm 50 gr TSX load.
5 shot averages fired at 3 meters from 14.5" M4 w/ave MV of 3012 fps:
BG: pen=14.7" RD=0.47" RW=49.9gr
Steel: pen=19.4" RD=0.22" RW=49.6gr
Wall: pen=16.7" RD=0.46" RW=49.9gr
Auto Glass: pen=17.0" RD=0.36" RW=43.4gr
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MV from various barrel lengths
8" = 2634 fps
10.5" = 2749 fps
14.5" = 3105 fps
20" = 3205 fps
One of the nice things about this load is that it works very well in barrels from 8-20 inches long and works in twists from 1/12 to 1/7.
The photo below compares a 3m BG shot from a 10.5" brl on top with a shot from a 20" brl on the bottom:
Below are some recovered bullets fired from an 8" brl into BG at 3m:
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