7.62x39 Ballistics Chart & Coefficient

Article Posted: July 11, 2012

7.62x39 Ballistics

This is a 7.62x39 ballistics chart (external) generated using our ballistic trajectory calculator. This round is most used in AK-47s and their variants.. The average 7.62x39mm bullet is something like a 123 grain that is fired at an average of at 2,350fps The charting below follows the trajectory all the way to 1000 yards in steps of 50 yard increments. The table below shows the range, drop (based off a 1.5" scope mount although most AKs dont have scopes), current velocity, energy, and time in seconds in relation to the bullets movement through space and time. This chart shows now effects of wind or atmosphere, but if you want to take in to effect these things check out the calculators official page. The Ballistic Coefficient for the 123gr 7.62x39mm is somewhere around .275 (in this example). The 7.62x39mm has a known ballistic coeficient of between .225 (a 123 gr bullet) and .325 (a 150 grain bullet), a very large range in deed.

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Range (yards)   Drop (inches)   Velocity   Energy   Time (seconds)  
0 -1.4917 2349 1507 0.00
50 0.1804 2175 1292 0.07
100 0.0106 2008 1101 0.14
150 -2.3203 1849 934 0.22
200 -7.1998 1699 788 0.30
250 -15.0980 1559 664 0.39
300 -26.5812 1430 558 0.49
350 -42.3234 1314 471 0.60
400 -63.1059 1214 402 0.72
450 -89.7903 1131 349 0.85
500 -123.2630 1066 310 0.99
550 -164.3779 1014 281 1.13
600 -213.9368 971 257 1.28
650 -272.6970 935 239 1.44
700 -341.6332 903 223 1.60
750 -421.0045 874 209 1.77
800 -511.7353 847 196 1.95
850 -614.9050 823 185 2.13
900 -730.9633 799 174 2.31
950 -860.2016 778 165 2.50
1000 -1,004.2421 757 156 2.70

So what does the charting of the 7.62x39mms external ballistics tell us exactly? It says that at around the halfway point of 500 yards the bullet has lost more than 55% of its velocity, lost just under 1,200 ft pounds of energy (now pushing just 310 lbs), and dropped due to gravitational forces some 120 some inches, and all of this in just a fraction of a second (.69 seconds). This drop is much more than the .223 Remington round in which will have only dropped 50" in 500 yards. This huge drop may play a role in the AKs long distance in-accuracy. This is due to the fact that the 7.62x39mm is a much heavier round. All of this have happened in 1 second.

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