This data is from a "reliable source".
Test Specifications:
Firearm used:
Colt AR-15A2 HBAR
Barrel:
20" length, 1 turn in 7" twist
Remington
Cases
Primers:
Remington 7 1/2
.224" 77
grain MatchKing HPBT Sierra Bullets
Cartidge
OAL: 2.260"
You must work up to the maximums shown here for your rifle and components.
Sierra #9377
77 grain Match King LOAD DATA
| Velocity | |||||||
| Powder |
2300
|
2400
|
2500
|
2600
|
2650
|
2700
|
2750
|
| H322 |
19.0
|
20.0
|
21.0
|
21.5
|
22.0
|
||
| AA-2230 |
19.9
|
20.8
|
21.7
|
22.6
|
23.1
|
23.5
|
|
| 748 |
21.4
|
21.9
|
22.4
|
22.8
|
23.1
|
23.3
|
23.6
|
| H335 |
20.2
|
21.0
|
21.9
|
22.3
|
22.7
|
||
| AA-2495 BR |
20.3
|
21.4
|
22.5
|
23.0
|
23.5
|
24.1
|
|
| RE-12 |
19.5
|
20.7
|
21.9
|
23.1
|
23.7
|
24.3
|
|
| H4895 |
21.4
|
21.9
|
22.4
|
22.9
|
23.2
|
23.5
|
23.8
|
| AA-4064 |
19.7
|
21.2
|
22.8
|
24.3
|
24.8
|
||
| VARGET |
19.5
|
20.5
|
21.5
|
22.5
|
23.0
|
23.5
|
24.0
|
| AA-2520 |
20.4
|
21.3
|
22.1
|
23.0
|
23.4
|
23.8
|
24.2
|
| RE-15 |
20.7
|
21.5
|
22.2
|
23.0
|
23.4
|
23.7
|
24.1
|
| Viht N140 |
19.6
|
21.1
|
22.5
|
24.0
|
24.7
|
||
| Viht N540 |
20.3
|
21.5
|
22.7
|
23.8
|
24.4
|
25.0
|
|
| KE in ft lbs |
905
|
985
|
1069
|
1156
|
1201
|
1247
|
1293
|