Temp around 65°
Cool air, warm sun.
Data was taken with garmin chrono
I tried to get groups but strong unpredictable gusts up to 30 mph in varying directions made it too difficult to isolate the ammo for consistent groups
Black hills 77 otm's red box. Unknown if this batch used the 77 sierra or the 77 hornady. All shot with suppressor. Data is avg of all strings. (3 strings 25 rounds)
High 2690 low 2622
avg 2649
Std dev 21
Ex spread 68
Black hills 69 TMK (only 1 string of 10 rounds)
High 2732 low 2683
Avg 2700
Std dev 18
Ex spread 49
Aac 75 gr w/o suppressor (1 string 10 rounds)
High 2600 low 2505
Avg 2554
Std dev 29
Ex spread 95
Aac 75 gr w/ suppressor. Avg of all strings (5 strings 50 rounds)
High 2647 low 2516
Avg 2557
Std dev 24
Ex spread 131
Now comes the part I was most excited about. I tested the badlands co 75 and 77 gr loaded in the Nas3 casings. These have given some really high velocities and I was hoping I would get similar. I was a bit let down.
75 gr w/ suppressor (4 strings 40 shots)
High 2738 low 2619
Avg 2669
Std dev 26
Ex spread 119
The 77's where similarly "slow" for what I had hoped for. (3 strings 30 shots)
High 2705 low 2571
Avg 2638
Std dev 28
Ex spread 134 (3 very low velocity shots)
If I exclude the low velocity shots I come up with
77's
Avg 2651
Std dev 18
Ex spread 84
75's
Avg 2675
Std dev 24
Ex spread 99
It should be noted that after taking out the shots that where much slower there were basically 2 velocities for the 75's. Most where within a few fps of 2650 OR 2700 the 77's didn't have the two distinct groups the 75's did.
*edit* spoke with the dudes at badlands. I called strictly to give data and feedback to which they didn't find the data satisfactory. They agreed the velocities were about 75 fps slower on average then they would have guessed (should have been about 2750) and they Ex spread should have been half. Long story short they will send me some new ammo to test when i get home from this upcoming deployment, none of which I asked for. That was really cool of them.
On a side note the Nas3 ammo was felt way less gassy than the aac ammo.
The last test was a poi shift when the suppressor is removed. My aac 75's (what it's zeroed on) shift .75moa left and 0moa vertically
Cool air, warm sun.
Data was taken with garmin chrono
I tried to get groups but strong unpredictable gusts up to 30 mph in varying directions made it too difficult to isolate the ammo for consistent groups
Black hills 77 otm's red box. Unknown if this batch used the 77 sierra or the 77 hornady. All shot with suppressor. Data is avg of all strings. (3 strings 25 rounds)
High 2690 low 2622
avg 2649
Std dev 21
Ex spread 68
Black hills 69 TMK (only 1 string of 10 rounds)
High 2732 low 2683
Avg 2700
Std dev 18
Ex spread 49
Aac 75 gr w/o suppressor (1 string 10 rounds)
High 2600 low 2505
Avg 2554
Std dev 29
Ex spread 95
Aac 75 gr w/ suppressor. Avg of all strings (5 strings 50 rounds)
High 2647 low 2516
Avg 2557
Std dev 24
Ex spread 131
Now comes the part I was most excited about. I tested the badlands co 75 and 77 gr loaded in the Nas3 casings. These have given some really high velocities and I was hoping I would get similar. I was a bit let down.
75 gr w/ suppressor (4 strings 40 shots)
High 2738 low 2619
Avg 2669
Std dev 26
Ex spread 119
The 77's where similarly "slow" for what I had hoped for. (3 strings 30 shots)
High 2705 low 2571
Avg 2638
Std dev 28
Ex spread 134 (3 very low velocity shots)
If I exclude the low velocity shots I come up with
77's
Avg 2651
Std dev 18
Ex spread 84
75's
Avg 2675
Std dev 24
Ex spread 99
It should be noted that after taking out the shots that where much slower there were basically 2 velocities for the 75's. Most where within a few fps of 2650 OR 2700 the 77's didn't have the two distinct groups the 75's did.
*edit* spoke with the dudes at badlands. I called strictly to give data and feedback to which they didn't find the data satisfactory. They agreed the velocities were about 75 fps slower on average then they would have guessed (should have been about 2750) and they Ex spread should have been half. Long story short they will send me some new ammo to test when i get home from this upcoming deployment, none of which I asked for. That was really cool of them.
On a side note the Nas3 ammo was felt way less gassy than the aac ammo.
The last test was a poi shift when the suppressor is removed. My aac 75's (what it's zeroed on) shift .75moa left and 0moa vertically
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