I had a chance to get to the range and shoot my 7.5", 10.5", and 16" 300BLK weapons with subsonic and supersonic ammo I wanted to see what the velocity difference would be with the different length barrels using the same ammo same day/same time using my Garmin Xero C1.
What I found is with the supersonic ammo there was a lot bigger difference in velocity with different barrel lengths vs the subsonic ammo with different barrel lengths.
Here are my results if anyone is interested each group was the average of 5 shots.
Forgot to add all shots were with a DA Nomad L attached to the weapons.
Hornady 190gr SubX
From the 7.5" to the 16" 115.4 difference.
7.5” Barrel 1044.3
10.5” Barrel 1076.7
16” Barrel 1159.7
10.5” Barrel 976.4
16” Barrel 979.8
10.5” Barrel 2163.1
16” Barrel 2345.3
What I found is with the supersonic ammo there was a lot bigger difference in velocity with different barrel lengths vs the subsonic ammo with different barrel lengths.
Here are my results if anyone is interested each group was the average of 5 shots.
Forgot to add all shots were with a DA Nomad L attached to the weapons.
Hornady 190gr SubX
From the 7.5" to the 16" 115.4 difference.
7.5” Barrel 1044.3
10.5” Barrel 1076.7
16” Barrel 1159.7
AAC "Sabre Blade Black Tip" 300 Blackout 220 Grain
From the 7.5" to the 16" 65.8 difference
7.5” Barrel 914.010.5” Barrel 976.4
16” Barrel 979.8
AAC "Sabre Blade Black Tip" 300 Blackout 125 Grain
From the 7.5" to the 16" 434.3 difference
7.5” Barrel 1911.010.5” Barrel 2163.1
16” Barrel 2345.3
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