Load Specifications
Bullet Manufacturer:Swift
Bullet Weight:165 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:1:11.5
Load data in caliber .300 H&H Mag. with .308 | 165gr | Swift Scirocco bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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% | 56,159 psi | 90% | 2795 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,608 psi | 89% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,983 psi | 87% | 2828 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,369 psi | 74% | 2789 fps | 97.6% |
| Accurate 4064 | <<locked>> | 88% | 55,927 psi | 90% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,072 psi | 90% | 2969 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,376 psi | 89% | 2904 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,200 psi | 85% | 2854 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,969 psi | 87% | 2949 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,375 psi | 87% | 2854 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,811 psi | 89% | 2828 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,434 psi | 89% | 3028 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,592 psi | 86% | 2940 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,577 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,911 psi | 86% | 2900 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,345 psi | 86% | 2972 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,679 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,808 psi | 85% | 2930 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,918 psi | 70% | 2818 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2995 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,376 psi | 89% | 2920 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 54,157 psi | 87% | 2894 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,925 psi | 86% | 2867 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,724 psi | 89% | 2831 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,925 psi | 86% | 2884 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,940 psi | 88% | 2910 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 54,868 psi | 88% | 2963 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,317 psi | 89% | 2927 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 55,999 psi | 90% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,403 psi | 86% | 2900 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,912 psi | 90% | 2949 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,259 psi | 89% | 3002 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 58% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,853 psi | 86% | 2867 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,420 psi | 90% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,057 psi | 90% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,709 psi | 89% | 2871 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 54,650 psi | 88% | 2900 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,651 psi | 89% | 2897 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 56,362 psi | 90% | 2959 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,317 psi | 89% | 2930 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,375 psi | 87% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,651 psi | 89% | 2881 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,723 psi | 88% | 2831 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,956 psi | 90% | 2884 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,535 psi | 89% | 2894 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 53,258 psi | 85% | 2881 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 54,259 psi | 87% | 2851 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,853 psi | 88% | 2848 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,200 psi | 85% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,013 psi | 88% | 2943 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 49,110 psi | 79% | 2949 fps | 97.2% |
| Norma URP | <<locked>> | 96% | 54,853 psi | 88% | 2956 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 53,664 psi | 86% | 2910 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,490 psi | 86% | 2949 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 54,317 psi | 87% | 2871 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,317 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 58% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,085 psi | 88% | 2894 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,491 psi | 87% | 2966 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,143 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,709 psi | 89% | 2992 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,911 psi | 88% | 3022 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 55,187 psi | 88% | 2831 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,839 psi | 88% | 2848 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,259 psi | 87% | 2890 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,750 psi | 83% | 2917 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 92% | 53,925 psi | 86% | 2867 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,535 psi | 89% | 2894 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,651 psi | 89% | 2881 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,956 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,258 psi | 85% | 2881 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,738 psi | 89% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,953 psi | 85% | 2848 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,911 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,347 psi | 89% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,970 psi | 90% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,550 psi | 89% | 2848 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,256 psi | 82% | 2910 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 54,969 psi | 88% | 2782 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,634 psi | 84% | 2841 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 54,331 psi | 87% | 2887 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,301 psi | 85% | 2956 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,634 psi | 84% | 2897 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 55,738 psi | 89% | 2769 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,810 psi | 88% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,477 psi | 89% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,695 psi | 89% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,795 psi | 86% | 2900 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 54,795 psi | 88% | 2854 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,650 psi | 86% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,246 psi | 90% | 2956 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,733 psi | 78% | 2897 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,519 psi | 86% | 2871 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,071 psi | 88% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,129 psi | 88% | 2969 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,450 psi | 63% | 2844 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,766 psi | 86% | 2884 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% | 52,808 psi | 85% | 2749 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,788 psi | 73% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,469 psi | 71% | 2661 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 37,869 psi | 61% | 2621 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,308 psi | 69% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,271 psi | 52% | 2507 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,907 psi | 78% | 2799 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,553 psi | 67% | 2644 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 50,473 psi | 81% | 2887 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,981 psi | 82% | 2802 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,054 psi | 83% | 2776 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,078 psi | 72% | 2844 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 50,343 psi | 81% | 2884 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,568 psi | 67% | 2671 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,512 psi | 71% | 2736 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,300 psi | 52% | 2520 fps | 95.1% |
| Alliant Reloder-17 | 57.2 gr | 80% | 36,143 psi | 58% | 2648 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,632 psi | 80% | 2877 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,110 psi | 48% | 2484 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,679 psi | 56% | 2664 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,501 psi | 78% | 2808 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 41,510 psi | 67% | 2677 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,744 psi | 72% | 2703 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,504 psi | 84% | 2785 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,488 psi | 81% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,134 psi | 68% | 2680 fps | 97.7% |
| Hodgdon H414 | 60.1 gr | 86% | 42,090 psi | 67% | 2730 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 48,617 psi | 78% | 2812 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 49,385 psi | 79% | 2808 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,704 psi | 48% | 2418 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,629 psi | 73% | 2782 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,585 psi | 71% | 2805 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 43% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,239 psi | 76% | 2756 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,661 psi | 80% | 2799 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,671 psi | 70% | 2680 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,963 psi | 74% | 2700 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 45,208 psi | 72% | 2733 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,714 psi | 70% | 2684 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 33,460 psi | 54% | 2520 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,614 psi | 73% | 2766 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,981 psi | 82% | 2802 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,718 psi | 78% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,356 psi | 78% | 2726 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,729 psi | 70% | 2684 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,421 psi | 62% | 2575 fps | 95.8% |
| Lovex S070 | <<locked>> | 86% | 41,452 psi | 66% | 2661 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,848 psi | 77% | 2746 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,298 psi | 77% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,859 psi | 70% | 2723 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 48,109 psi | 77% | 2825 fps | 95% |
| Norma MRP | <<locked>> | 96% | 42,975 psi | 69% | 2825 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 34,766 psi | 56% | 2566 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 43,859 psi | 70% | 2743 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 38,522 psi | 62% | 2661 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 50,995 psi | 82% | 2815 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,691 psi | 81% | 2831 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 44% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,380 psi | 68% | 2664 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 76% | 2848 fps | 99.4% |
| ReloadSwiss RS 60 | 57.2 gr | 80% | 38,450 psi | 62% | 2713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,185 psi | 55% | 2579 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,419 psi | 58% | 2644 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 52,025 psi | 83% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,701 psi | 73% | 2700 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,030 psi | 63% | 2621 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 48,501 psi | 78% | 2858 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 44,744 psi | 72% | 2703 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,421 psi | 62% | 2575 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,718 psi | 78% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,729 psi | 70% | 2684 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,452 psi | 66% | 2661 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,103 psi | 64% | 2671 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,603 psi | 80% | 2792 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,398 psi | 76% | 2766 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,849 psi | 78% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,973 psi | 66% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,815 psi | 69% | 2625 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,066 psi | 77% | 2854 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 48,631 psi | 78% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,385 psi | 79% | 2789 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,668 psi | 64% | 2625 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,124 psi | 47% | 2461 fps | 97.3% |
| Somchem S385 | <<locked>> | 94% | 43,076 psi | 69% | 2723 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 49,298 psi | 79% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,339 psi | 73% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,803 psi | 73% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,797 psi | 61% | 2556 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,823 psi | 54% | 2510 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 51,256 psi | 82% | 2799 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,251 psi | 71% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,388 psi | 54% | 2510 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 30,734 psi | 49% | 2507 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,489 psi | 54% | 2487 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 51,532 psi | 83% | 2848 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,250 psi | 68% | 2733 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,340 psi | 45% | 2503 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,210 psi | 76% | 2772 fps | 99.9% |
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 | 165gr | Swift Scirocco. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,028 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 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:11.5 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. Alliant Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .300 H&H Mag. with the .308 | 165gr | Swift Scirocco 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.