Hey guys, I decided to do my own little write up since I was investigating what many are curious about as well. I had a Krieger 26" .223 chambered bull barrel chopped a few months ago to 22" and threaded with a standard 1/2"x28 threads. This barrel has a twist rate of 1 in 7.7" and is the "VarMatch" contour (.936" gas block/ .920" muzzle before threading).
Rifle is a build:
LOWER
BCM lower
BCM enhanced lower parts
BCM PNT trigger
BCM black trigger guard
BCM mod 3 pistol grip
Ergo F93 stock
LBE buffer
LBE buffer spring
UPPER
BCM upper
BCM mod 4 charging handle
Burris MTAC 4.5-14x42
Aero Precision 30mm mount
Trijicon RMR RM05 w/
Daniel Defense 1 o'clock mount
Magpul Pro LR rear BUIS
Magpul Pro front BUIS
Fortis REV I 14” rail
Krieger 22” VarMatch barrel
CMMG .936” gas block
Ballistic Advantage melonited rifle gas tube
ALG single-chamber comp
Yankee Hill bipod adapter
Harris 9-13” bipod
KAC rail cover

Now that the gun has been covered, here is a background on myself for anyone questioning shooter error. I recently finished 5 years in the Marines as an infantry MOS. For those in the Corps or priors, I typically shoot in the high 230s to low 240s on my table one known distance qualification. I am by no means a professional shooter. Data was collected shooting across a bean field in Holly Grove, AR. Unfortunately, the table was old wood and had some give to it. Not the most stable. I used my bipod in the front and a sandbag under the pistol grip. It was 77 degrees, 60% humidity, 153 ft elevation. There was a 5 MPH right-to-left wind with gusts up to 9 or 10 MPH. Range was 100 yds, ranged with a rangefinder then walked off with a tape. Let's get to the data!

Ammo is chicken scratched at the top of each target, but I'll label them accordingly.

5.56mm PMC X-Tac 62gr LAP Green Tip


5.56mm IMI Razorcore 77gr OTM


5.56mm Black Hills 77gr OTM


5.56mm Black Hills 77gr Tipped Matchking


5.56mm Federal FC262 77gr OTM


5.56mm SSA 77gr OTM


Below are the respective muzzle velocities from a 5-shot strand:
5.56mm PMC X-Tac 62gr LAP Green Tip
3218, 3199, 3217, 3162, 3181
AVG- 3195.4
SD- 24.0
5.56mm IMI Razorcore 77gr OTM
2996, 2918, 2991, 2954, 2945
AVG- 2960.8
SD- 32.7
5.56mm Black Hills 77gr OTM
2980, 2878, 2897, 2882, 2918
AVG- 2911
SD- 37.2
5.56mm Black Hills 77gr Tipped Matchking
2943, 2924, 2962, 2969, 2950
AVG- 2949.6
SD- 15.7
5.56mm Federal FC262 77gr OTM
2864, 2844, 2857, 2875, 2881
AVG- 2864.2
SD- 13.1
5.56mm SSA 77gr OTM
2682, 2658, 2654, 2663, 2644
AVG- 2660.2
SD- 12.6

Thank you for sharing your data. How was shooting 5.56 out of the .223 chambered krieger? Any pressure signs?

Thanks for sharing! Any real world experience that adds to the brain trust is welcomed.

No pressure issues whatsoever