SLW Barrel Shootout – IMI 77gr Ammo Performance

The first ammo we wanted to post the data on was the IMI 5.56 77gr OTM load (also called IMI Razor Core 77gr). We have had more questions about this particular load than almost any other ammo so we wanted to post this info first. Each of the barrels (Ballistic Advantage, Criterion and LaRue) has been changed to ‘Barrel 1’ ‘Barrel 2′ and Barrel 3’ (in a random order).

All Chrono data was measured by a LabRadar Doppler Chronograph and the data was pulled from the strings saved to its SD card

All target measurements were done with OnTarget Precision Calculator software.


The IMI shot an average of 2639.083 fps between the 60 shots fired out of the 3 different 16″ barrels we tested. The Standard Deviation was one of the lowest we saw with any ammunition and also turned in some of the highest velocities. The graph below shows the shot to shot velocity of each string and also the average of each string. Further down is the raw data that this graph was generated from.

imi-77gr-velocity-fps-16-barrel

 

Ballistic Advantage (Series 1) Ballistic Advantage (Series 2)
Stats – Average 2638.65 fps Stats – Average 2640.5 fps
Stats – Highest 2687.29 fps Stats – Highest 2660.84 fps
Stats – Lowest 2609.12 fps Stats – Lowest 2609.53 fps
Stats – Ext. Spread 78.17 fps Stats – Ext. Spread 51.31 fps
Stats – Std. Dev 20.86 fps Stats – Std. Dev 16.1 fps
Shot ID V0 11/12/2016 Shot ID V0 11/13/2016
1 2687 15:12:25 1 2656 12:08:08
2 2648 15:12:49 2 2661 12:08:55
3 2634 15:13:05 3 2644 12:09:31
4 2640 15:13:19 4 2643 12:09:59
5 2636 15:13:34 5 2610 12:10:27
6 2609 15:13:49 6 2635 12:11:05
7 2631 15:14:04 7 2620 12:11:27
8 2618 15:14:19 8 2637 12:11:43
9 2647 15:14:39 9 2643 12:12:05
10 2635 15:14:52 10 2656 12:12:25

 

Criterion (Series 1) Criterion (Series 2)
Stats – Average 2642.58 fps Stats – Average 2638.44 fps
Stats – Highest 2670.64 fps Stats – Highest 2667.07 fps
Stats – Lowest 2621.6 fps Stats – Lowest 2614.76 fps
Stats – Ext. Spread 49.04 fps Stats – Ext. Spread 52.31 fps
Stats – Std. Dev 16.21 fps Stats – Std. Dev 15.01 fps
Shot ID V0 11/12/2016 Shot ID V0 11/13/2016
1 2654 16:17:52 1 2637 14:59:18
2 2625 16:18:16 2 2649 14:59:35
3 2622 16:18:31 3 2630 14:59:50
4 2671 16:18:49 4 2640 15:00:15
5 2648 16:19:03 5 2637 15:00:33
6 2625 16:19:19 6 2667 15:01:08
7 2657 16:19:40 7 2622 15:01:28
8 2652 16:19:52 8 2615 15:01:44
9 2638 16:20:08 9 2652 15:02:01
10 2635 16:20:23 10 2636 15:02:20
LaRue (Series 1) LaRue (Series 2)
Stats – Average 2647.57 fps Stats – Average 2626.87 fps
Stats – Highest 2677.04 fps Stats – Highest 2653.17 fps
Stats – Lowest 2630.46 fps Stats – Lowest 2591.4 fps
Stats – Ext. Spread 46.58 fps Stats – Ext. Spread 61.77 fps
Stats – Std. Dev 15.77 fps Stats – Std. Dev 19.08 fps
Shot ID V0 11/12/2016 Shot ID V0 11/13/2016
1 2669 17:23:17 1 2625 11:26:21
2 2634 17:23:31 2 2591 11:26:43
3 2631 17:23:41 3 2653 11:27:10
4 2652 17:23:58 4 2614 11:27:35
5 2677 17:24:24 5 2636 11:27:55
6 2640 17:24:42 6 2624 11:28:41
7 2647 17:24:57 7 2640 11:29:02
8 2641 17:25:12 8 2612 11:29:23
9 2653 17:25:26 9 2652 11:29:48
10 2630 17:25:38 10 2622 11:30:08

 

Next are the targets, each barrel shot one 10 round and 2 5 round groups for a total of 60 rounds fired. Barrel 2 turned in the smallest group with a .743 MOA group and a 5 shot group average of 1.2105 MOA averaged between all 6 groups.

imi-10-and-5-shot-watermark

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