2 We had a chance to take out the new SilencerCo Harvester 300 blackout ammo and compare it against some Remington 300 backout ammo. The results were really impressive. The gun that we tested the ammo with was an AAC MPW with a 12.5” barrel using an Aimpoint and a SilencerCo Specwar 7.62 silencer. We set up the target at 50 yards attached the Magnetospeed and went to work.

Remington 300BLK 220gr                  SilencerCo Harvester 300BLK 220gr

Min Velocity                   953 FPS                                             996 FPS Max Velocity                  1052 FPS                                           1017 FPS AVG Velocity                 1011  FPS                                          1007 FPS Standard Deviation        37  FPS                                              7.6 FPS All numbers gathered were using a Magnetospeed V3 and a string of ten shots per ammo. Which gives a broader spectrum of averages. A better accuracy test will follow when we put a scope on the rifle and group it at 100 yards. IMG_0691 IMG_0684 Accuracy wise the SilencerCo ammo did outperform the Remington ammo. As you can see the group for the SilencerCo was about 1.5in where the Remington hovered at about 2.5in. IMG_0683 The real kicker here is in the numbers displayed above. While average velocities were about the same. The big surprise was the Standard Deviation number on the SilencerCo ammo. Standard Deviation for people that are unaware is how much the velocity will deviate from its average. If you know any long range shooters that reload what they’re really going for in hand loads is a Standard Deviation number in the single digits. That gives them a much higher probability in hitting those targets at longer ranges. Single digit Standard Deviations is usually something you only see in high quality custom or hand loaded ammo. To see it in a factory offering is astonishing. This correlates into 300BLK as well. As you increase the distance it will give you a better probability of hit. SilencerCo lists their ammo as having a velocity of 1029 FPS. We saw a little lower than that but there are several factors that could cause that to change including temperature and altitude. Also they list the standard deviation as +/- 13FPS and our test showed better than that with +/- 7.6FPS which is great. IMG_0682 Overall we were impressed with the performance of the SilencerCo Harvester 300 blackout ammo. While we don’t have any plans of carrying it right know if you have a 300 blackout you should definitely check it out.