208gr Hornady A-Max A1680 with 8" Barrel Chrono results

[Robot]

Just took my 300BLK pistol out for a test and here are some chrono results:

8" KAK 300BLK Barrel with KAK Muzzle brake.

Load recipe:
- 208gr Hornady A-Max
- Winchester Small Rifle Primer
- OAL 2.125
- A1680 Powder


10.2gr:
924
946
946
945
920
Ave: 936.2
SD: 13.05

10.5gr:
968
962
972
962
964
Ave: 965.6
SD: 4.34

10.7gr:
970
969
981
960
985
Ave: 973
SD: 10.02

Hitting a man-sized steel plate consistently at 200 yards with a 25yard zero and around +6ft elevation. Will post up a video soon!

[vandy58]

Nice write up, I just loaded up the same recipe however I went with the hornady book and did 2.250 OAL, any reason you went lower? I will be shooting through I 9" SBR

[Robot]

Nice write up, I just loaded up the same recipe however I went with the hornady book and did 2.250 OAL, any reason you went lower? I will be shooting through I 9" SBR

No special reason. I got the OAL from a previous poster on this forum in the BLK Recipe thread so since this is the first load I've ever made, I stuck with it

[paper9]

Which chronograph did you use?

[rjacobs]

Nice write up, I just loaded up the same recipe however I went with the hornady book and did 2.250 OAL, any reason you went lower? I will be shooting through I 9" SBR

2.120 for best feeding. You MAY have feed issues that long, you may not.

[Blowout]

Did you get the 1x8 or 1x7 KAK barrel?

[Robot]

Did you get the 1x8 or 1x7 KAK barrel?

I got the 1x8.

Which chronograph did you use?

I'm using the Competition Electronics chrono : http://www.amazon.com/Competition-Elect ... lectronics

[elitejake]

Your low load was way too hot in a 9.5" barrel for 208s. Good start but more testing to do. The added suppressor didn't help either. Thanks for the starting point.

[jwb47]

Your low load was way too hot in a 9.5" barrel for 208s. Good start but more testing to do. The added suppressor didn't help either. Thanks for the starting point.

Please explain

[TTNWA]

Your low load was way too hot in a 9.5" barrel for 208s. Good start but more testing to do. The added suppressor didn't help either. Thanks for the starting point.

What velocity were you getting and with what load? Hard to believe that a 1.5" longer barrel would make much difference.