Load Specifications
Bullet:.308 | 155gr | Norma GTX
Bullet Manufacturer:Norma
Bullet Weight:155 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 H&H Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:13.5
Load data in caliber .300 H&H Mag. with .308 | 155gr | Norma GTX bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 and ReloadSwiss RS 70.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 56,231 psi | 90% | 2897 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,753 psi | 89% | 2927 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,128 psi | 87% | 2923 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,746 psi | 75% | 2884 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 55,927 psi | 90% | 2979 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,275 psi | 90% | 3071 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,550 psi | 89% | 3005 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,272 psi | 85% | 2956 fps | 99.7% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 3045 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,418 psi | 87% | 2956 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,796 psi | 89% | 2930 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,724 psi | 89% | 3133 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,998 psi | 87% | 3041 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,534 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,896 psi | 86% | 2999 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,505 psi | 86% | 3071 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,882 psi | 88% | 3110 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 3031 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,976 psi | 71% | 2910 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,908 psi | 80% | 3094 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,535 psi | 89% | 3022 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,433 psi | 87% | 2995 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,085 psi | 87% | 2963 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,840 psi | 90% | 2936 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,012 psi | 87% | 2982 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,897 psi | 88% | 3005 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 55,056 psi | 88% | 3064 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 55,274 psi | 89% | 3022 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 56,115 psi | 90% | 3018 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,461 psi | 86% | 2995 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,144 psi | 90% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,622 psi | 89% | 3104 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 57% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,766 psi | 86% | 2966 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,939 psi | 85% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,072 psi | 90% | 2992 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,622 psi | 89% | 2966 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 54,607 psi | 88% | 2992 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,753 psi | 89% | 2995 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 52,982 psi | 85% | 3002 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,303 psi | 89% | 3031 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,418 psi | 87% | 2956 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,622 psi | 89% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,795 psi | 88% | 2933 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,289 psi | 90% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,579 psi | 89% | 2992 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 53,229 psi | 85% | 2972 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 54,288 psi | 87% | 2949 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,824 psi | 88% | 2949 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,185 psi | 85% | 2986 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 55,274 psi | 89% | 3041 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 49,487 psi | 79% | 3048 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 54,940 psi | 88% | 3054 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 53,940 psi | 86% | 3012 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 53,751 psi | 86% | 3048 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 54,592 psi | 88% | 2972 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,389 psi | 87% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,114 psi | 88% | 2989 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,723 psi | 88% | 3071 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,476 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,130 psi | 90% | 3094 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,172 psi | 88% | 3123 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 55,071 psi | 88% | 2930 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,795 psi | 88% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,288 psi | 87% | 2989 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,982 psi | 83% | 3012 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 54,085 psi | 87% | 2963 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,579 psi | 89% | 2992 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,622 psi | 89% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,289 psi | 90% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,229 psi | 85% | 2972 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,941 psi | 90% | 3051 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,287 psi | 85% | 2949 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,085 psi | 87% | 2976 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,332 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,028 psi | 90% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,637 psi | 89% | 2943 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,488 psi | 83% | 3005 fps | 95.9% |
| Somchem S335 | <<locked>> | 84% | 54,998 psi | 88% | 2884 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,750 psi | 85% | 2940 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 54,404 psi | 87% | 2982 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,403 psi | 86% | 3058 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,736 psi | 85% | 2989 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 55,724 psi | 89% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,911 psi | 88% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,579 psi | 89% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,796 psi | 89% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,896 psi | 86% | 2999 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,737 psi | 88% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,751 psi | 86% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,924 psi | 85% | 2999 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,095 psi | 79% | 2992 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,824 psi | 86% | 2972 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,100 psi | 88% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,303 psi | 89% | 3068 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,566 psi | 63% | 2933 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,070 psi | 87% | 2982 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 53,011 psi | 85% | 2851 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,876 psi | 74% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,427 psi | 76% | 2805 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 40,611 psi | 65% | 2766 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 43,410 psi | 70% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,664 psi | 56% | 2648 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,878 psi | 78% | 2894 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,655 psi | 67% | 2736 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 98% | 50,546 psi | 81% | 2979 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,937 psi | 82% | 2897 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,214 psi | 84% | 2881 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,107 psi | 72% | 2936 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 50,415 psi | 81% | 2979 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,611 psi | 67% | 2759 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,469 psi | 71% | 2825 fps | 98.8% |
| Alliant Reloder-16 | 57.1 gr | 82% | 34,316 psi | 55% | 2657 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,085 psi | 58% | 2730 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,734 psi | 80% | 2969 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,124 psi | 48% | 2562 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 37,463 psi | 60% | 2818 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,457 psi | 78% | 2900 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 41,640 psi | 67% | 2769 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 44,860 psi | 72% | 2792 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,562 psi | 84% | 2884 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,560 psi | 81% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,206 psi | 68% | 2772 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 42,134 psi | 68% | 2818 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 48,791 psi | 78% | 2907 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 49,371 psi | 79% | 2907 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,776 psi | 48% | 2500 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,774 psi | 73% | 2881 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,686 psi | 72% | 2897 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 43% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,442 psi | 76% | 2854 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 49,559 psi | 79% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,787 psi | 70% | 2776 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,093 psi | 74% | 2795 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 45,397 psi | 73% | 2825 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,700 psi | 70% | 2772 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 33,489 psi | 54% | 2605 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 45,600 psi | 73% | 2858 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 50,937 psi | 82% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,718 psi | 78% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,472 psi | 78% | 2825 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,801 psi | 70% | 2776 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,406 psi | 62% | 2661 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 41,495 psi | 67% | 2749 fps | 95% |
| Norma 201 | <<locked>> | 80% | 47,906 psi | 77% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,370 psi | 78% | 2848 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,845 psi | 70% | 2815 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 51,851 psi | 83% | 2986 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 43,076 psi | 69% | 2913 fps | 95% |
| Norma URP | <<locked>> | 82% | 34,693 psi | 56% | 2644 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 43,888 psi | 70% | 2835 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 41,234 psi | 66% | 2805 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 50,981 psi | 82% | 2910 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,966 psi | 82% | 2933 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 44% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,337 psi | 68% | 2749 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 76% | 2946 fps | 99.2% |
| ReloadSwiss RS 60 | 60 gr | 80% | 38,392 psi | 62% | 2802 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,869 psi | 59% | 2726 fps | 95.9% |
| ReloadSwiss RS 70 | 65.6 gr | 86% | 39,102 psi | 63% | 2795 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,054 psi | 83% | 2881 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,658 psi | 73% | 2795 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,102 psi | 63% | 2707 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 48,660 psi | 78% | 2949 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 44,860 psi | 72% | 2792 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,406 psi | 62% | 2661 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,718 psi | 78% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,801 psi | 70% | 2776 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,495 psi | 67% | 2749 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,074 psi | 64% | 2759 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,588 psi | 80% | 2887 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,442 psi | 76% | 2861 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,907 psi | 78% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,017 psi | 66% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,989 psi | 69% | 2717 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,196 psi | 77% | 2946 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,718 psi | 78% | 2785 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,356 psi | 79% | 2881 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,711 psi | 64% | 2710 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 29,109 psi | 47% | 2536 fps | 96.7% |
| Somchem S385 | <<locked>> | 96% | 46,209 psi | 74% | 2871 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 49,356 psi | 79% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,397 psi | 73% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,847 psi | 74% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,811 psi | 61% | 2644 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 82% | 36,260 psi | 58% | 2654 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 51,372 psi | 82% | 2897 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,324 psi | 71% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,766 psi | 57% | 2651 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 32,764 psi | 53% | 2641 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,460 psi | 54% | 2569 fps | 97.3% |
| Winchester 748 | <<locked>> | 80% | 51,474 psi | 83% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,279 psi | 68% | 2822 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,371 psi | 49% | 2651 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,297 psi | 76% | 2867 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 98 powders for .300 H&H Mag. loaded with the .308 | 155gr | Norma GTX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,133 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 H&H Mag. with the .308 | 155gr | Norma GTX they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.