Load Specifications
Bullet Manufacturer:Hornady
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 | Hornady BTHP Match bullet and 98 powders. The key underlying parameters are shown in the table above.
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% | 56,217 psi | 90% | 2897 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,521 psi | 89% | 2923 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,954 psi | 87% | 2920 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,543 psi | 75% | 2881 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 55,724 psi | 89% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,101 psi | 90% | 3068 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,332 psi | 89% | 3002 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,405 psi | 90% | 3005 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,969 psi | 87% | 3038 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,172 psi | 87% | 2949 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,521 psi | 89% | 2927 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,506 psi | 89% | 3130 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,795 psi | 86% | 3038 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,548 psi | 86% | 2976 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,940 psi | 86% | 2999 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,345 psi | 86% | 3068 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,636 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 3025 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,787 psi | 70% | 2904 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,734 psi | 80% | 3091 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,288 psi | 89% | 3018 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 54,157 psi | 87% | 2992 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,882 psi | 86% | 2963 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,637 psi | 89% | 2933 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,824 psi | 86% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,911 psi | 88% | 3005 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 54,897 psi | 88% | 3061 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 55,288 psi | 89% | 3022 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 55,898 psi | 90% | 3012 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,476 psi | 86% | 2995 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,883 psi | 90% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,434 psi | 89% | 3097 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1864 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,780 psi | 86% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,275 psi | 90% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,115 psi | 90% | 2989 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,651 psi | 89% | 2966 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 54,462 psi | 87% | 2989 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,825 psi | 90% | 2995 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 52,997 psi | 85% | 3002 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 55,288 psi | 89% | 3028 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,172 psi | 87% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,608 psi | 89% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,534 psi | 87% | 2927 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,014 psi | 90% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,361 psi | 89% | 2989 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 53,243 psi | 85% | 2972 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 54,056 psi | 87% | 2946 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,824 psi | 88% | 2949 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,171 psi | 85% | 2982 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 55,056 psi | 88% | 3038 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 49,298 psi | 79% | 3041 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 54,955 psi | 88% | 3054 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 53,751 psi | 86% | 3009 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 53,534 psi | 86% | 3041 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 54,404 psi | 87% | 2969 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,172 psi | 87% | 2986 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 58% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,911 psi | 88% | 2986 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,433 psi | 87% | 3064 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,273 psi | 87% | 3104 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,898 psi | 90% | 3091 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,969 psi | 88% | 3117 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 55,085 psi | 88% | 2930 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,853 psi | 88% | 2946 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,041 psi | 87% | 2982 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,764 psi | 83% | 3005 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 53,882 psi | 86% | 2963 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,361 psi | 89% | 2989 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,608 psi | 89% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,014 psi | 90% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,243 psi | 85% | 2972 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,738 psi | 89% | 3045 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,069 psi | 85% | 2946 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,867 psi | 86% | 2972 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,332 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,782 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,448 psi | 89% | 2940 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,271 psi | 82% | 3002 fps | 95.8% |
| Somchem S335 | <<locked>> | 84% | 54,781 psi | 88% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,347 psi | 90% | 2992 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,215 psi | 87% | 2982 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,417 psi | 86% | 3058 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2986 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 55,709 psi | 89% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,636 psi | 88% | 2910 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,303 psi | 89% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,579 psi | 89% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,722 psi | 86% | 2995 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,766 psi | 88% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,563 psi | 86% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,376 psi | 90% | 3054 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2992 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,635 psi | 86% | 2966 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,085 psi | 88% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,143 psi | 88% | 3064 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,421 psi | 63% | 2927 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,824 psi | 86% | 2979 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 52,779 psi | 85% | 2848 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,832 psi | 73% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,471 psi | 76% | 2805 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 40,466 psi | 65% | 2759 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,366 psi | 70% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,490 psi | 55% | 2644 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 48,849 psi | 78% | 2890 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,452 psi | 66% | 2730 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 98% | 50,604 psi | 81% | 2979 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,952 psi | 82% | 2897 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,938 psi | 83% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,889 psi | 72% | 2933 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 50,256 psi | 81% | 2976 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,568 psi | 67% | 2759 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,483 psi | 71% | 2828 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,316 psi | 55% | 2657 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,100 psi | 58% | 2730 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,545 psi | 79% | 2966 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,994 psi | 48% | 2556 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 92% | 37,289 psi | 60% | 2815 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,283 psi | 77% | 2897 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 41,452 psi | 66% | 2762 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 44,672 psi | 72% | 2789 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,315 psi | 84% | 2881 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,357 psi | 81% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,032 psi | 67% | 2766 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 42,119 psi | 68% | 2818 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 48,602 psi | 78% | 2904 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 49,356 psi | 79% | 2904 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,631 psi | 48% | 2493 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,571 psi | 73% | 2874 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,541 psi | 71% | 2894 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 43% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,253 psi | 76% | 2851 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 49,545 psi | 79% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,569 psi | 70% | 2769 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,079 psi | 74% | 2795 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 45,208 psi | 72% | 2822 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,497 psi | 70% | 2766 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 33,330 psi | 53% | 2598 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 45,585 psi | 73% | 2858 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 50,952 psi | 82% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,486 psi | 78% | 2867 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,225 psi | 77% | 2818 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,598 psi | 70% | 2769 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,203 psi | 61% | 2654 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 44,005 psi | 71% | 2802 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 47,921 psi | 77% | 2841 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 48,356 psi | 78% | 2848 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,830 psi | 70% | 2815 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 51,648 psi | 83% | 2979 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 45,977 psi | 74% | 2972 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 34,664 psi | 56% | 2644 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,671 psi | 70% | 2828 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 41,234 psi | 66% | 2808 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 50,995 psi | 82% | 2910 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,705 psi | 81% | 2927 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,366 psi | 68% | 2749 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,500 psi | 76% | 2943 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,392 psi | 62% | 2802 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,709 psi | 59% | 2720 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 38,914 psi | 62% | 2789 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 51,750 psi | 83% | 2877 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,455 psi | 73% | 2789 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,059 psi | 63% | 2707 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 48,443 psi | 78% | 2946 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 44,672 psi | 72% | 2789 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,203 psi | 61% | 2654 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,486 psi | 78% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,598 psi | 70% | 2769 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 44,005 psi | 71% | 2802 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,103 psi | 64% | 2759 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,647 psi | 80% | 2887 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,427 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% | 40,988 psi | 66% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,801 psi | 69% | 2710 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,979 psi | 77% | 2940 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 48,704 psi | 78% | 2785 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,110 psi | 79% | 2877 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 39,726 psi | 64% | 2713 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% | 49,327 psi | 79% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,339 psi | 73% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,803 psi | 73% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,811 psi | 61% | 2641 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 36,056 psi | 58% | 2648 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 51,140 psi | 82% | 2894 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,092 psi | 71% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,621 psi | 57% | 2648 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 32,750 psi | 53% | 2641 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,330 psi | 53% | 2562 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 51,445 psi | 82% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,119 psi | 68% | 2818 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,269 psi | 49% | 2644 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,065 psi | 75% | 2864 fps | 99.7% |
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 | Hornady BTHP Match. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,130 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.