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9/22/2017 12:11:25 AM
Posted: 9/13/2005 9:05:09 AM EDT
I've been through every post with xm855 and ss109 in the title and can't seem to locate a chronograph table with the xm855 info on it. I'm particularly looking for info on a 14.5" barrel and out to 500yds. Any help is appreciated. Thanks.
Link Posted: 9/13/2005 9:56:45 AM EDT
M855, from a 14.5" barrel with a variety of zeros:
	M855 - M4		
Yards M855 - M4
Bubba Mil Marine IBZ
0 -2.6 -2.6 -2.6 -2.6
25 0 -0.2 -0.7 -1.2
50 2.4 2 0.9 0
75 4.4 3.9 2.2 0.9
100 6.3 5.5 3.3 1.6
125 7.8 6.9 4.1 1.9
150 9 7.9 4.6 2
175 9.9 8.6 4.7 1.7
200 10.5 9 4.5 1.1
225 10.7 9 4 0.1
250 10.5 8.6 3.1 -1.3
275 9.9 7.9 1.7 -3.1
300 8.8 6.6 -0.1 -5.3
325 7.3 5 -2.3 -8
350 5.4 2.8 -5 -11.11
375 2.8 0.1 -8.3 -14.8
400 -0.2 -3.1 -12.1 -19
425 -3.9 -7 -16.5 -23.9
450 -8.1 -11.4 -21.5 -29.3
475 -13.1 -16.6 -27.2 -35.5
500 -18.8 -22.4 -33.6 -42.3


Assumptions:
M855 from an M4 MV: 2970 fps @ 78'
Standard Conditions @ sea level

Bubba Zero: My name for those that zero @ 25 yards POA=POI
Marine Zero: New 36y zero mentioned by D.S. Hewitt as used by the Marines
IBZ: Chuck Santose's Improved Battle Sight Zero POA=POI @ 50 yards
Mil: Standard Zero as proscribed in the -10s (see below)

Link Posted: 9/13/2005 3:52:09 PM EDT
Thank you sir.
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