Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:180 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:1:16.0
Load data in caliber .300 H&H Mag. with .308 | 180gr | Sierra Pro-Hunter bullet and 89 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 2495 | <<locked>> | 82% | 55,593 psi | 89% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,171 psi | 85% | 2733 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 2831 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 55,970 psi | 90% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,171 psi | 85% | 2825 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,956 psi | 90% | 2972 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 86% | 56,057 psi | 90% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,201 psi | 87% | 2871 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,317 psi | 89% | 2917 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,376 psi | 89% | 2927 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,490 psi | 86% | 2779 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,563 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,896 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,201 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,374 psi | 86% | 2854 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2913 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2848 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,527 psi | 71% | 2769 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,085 psi | 88% | 2986 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,690 psi | 80% | 2835 fps | 97.2% |
| Bofors RP3 | <<locked>> | 84% | 54,128 psi | 87% | 2792 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2913 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 53,664 psi | 86% | 2779 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,563 psi | 87% | 2808 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,332 psi | 89% | 2877 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 54,955 psi | 88% | 2835 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 98% | 55,448 psi | 89% | 2861 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,215 psi | 87% | 2841 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,346 psi | 87% | 2808 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,651 psi | 89% | 2841 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,627 psi | 70% | 2799 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 90% | 55,564 psi | 89% | 2913 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 59% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,347 psi | 90% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,506 psi | 89% | 2785 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,578 psi | 88% | 2769 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 54,578 psi | 88% | 2812 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,216 psi | 89% | 2805 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 53,606 psi | 86% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,940 psi | 88% | 2822 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,751 psi | 86% | 2799 fps | 96.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2884 fps | 96.6% |
| Lovex S062 | <<locked>> | 84% | 55,695 psi | 89% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,347 psi | 89% | 2802 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,243 psi | 85% | 2792 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,411 psi | 73% | 2684 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 52,866 psi | 85% | 2782 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,216 psi | 89% | 2861 fps | 98% |
| Norma MRP | <<locked>> | 98% | 53,954 psi | 87% | 2940 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 55,376 psi | 89% | 2864 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,548 psi | 86% | 2808 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2904 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 54,157 psi | 87% | 2864 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,311 psi | 76% | 2776 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 59% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,418 psi | 87% | 2792 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,491 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,953 psi | 85% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,158 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,540 psi | 70% | 2792 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 54,317 psi | 87% | 2743 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,230 psi | 87% | 2789 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,898 psi | 90% | 2841 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 56,159 psi | 90% | 2897 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 53,664 psi | 86% | 2779 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,347 psi | 89% | 2802 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,695 psi | 89% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,243 psi | 85% | 2792 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,753 psi | 89% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,201 psi | 89% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,853 psi | 88% | 2753 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,666 psi | 89% | 2890 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 54,157 psi | 87% | 2782 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,867 psi | 86% | 2776 fps | 96% |
| Somchem S365 | <<locked>> | 94% | 54,737 psi | 88% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,359 psi | 86% | 2818 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 54,650 psi | 88% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,911 psi | 88% | 2720 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,608 psi | 89% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,027 psi | 87% | 2808 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,518 psi | 84% | 2792 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 52,982 psi | 85% | 2713 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,113 psi | 85% | 2812 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 53,853 psi | 86% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,302 psi | 87% | 2930 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,359 psi | 86% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,521 psi | 89% | 2881 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,412 psi | 74% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,330 psi | 86% | 2812 fps | 97.8% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 52,156 psi | 84% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,835 psi | 80% | 2680 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 33,968 psi | 54% | 2444 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,443 psi | 79% | 2677 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,826 psi | 61% | 2549 fps | 98.3% |
| Accurate High Country | <<locked>> | 92% | 45,179 psi | 72% | 2782 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 46,630 psi | 75% | 2654 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 44,411 psi | 71% | 2694 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 48,414 psi | 78% | 2795 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,474 psi | 83% | 2864 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,079 psi | 75% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,357 psi | 81% | 2746 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,811 psi | 59% | 2556 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,669 psi | 67% | 2680 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,092 psi | 71% | 2687 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,640 psi | 67% | 2680 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,963 psi | 43% | 2310 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,474 psi | 52% | 2484 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 82% | 30,864 psi | 49% | 2480 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 43,758 psi | 70% | 2723 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,485 psi | 76% | 2687 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,640 psi | 67% | 2680 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,771 psi | 67% | 2562 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 47,761 psi | 77% | 2697 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 39,711 psi | 64% | 2592 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 42,627 psi | 68% | 2612 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 51,793 psi | 83% | 2802 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,836 psi | 82% | 2785 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,330 psi | 55% | 2451 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,054 psi | 83% | 2789 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,046 psi | 66% | 2736 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 38,508 psi | 62% | 2595 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 44% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,997 psi | 85% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,052 psi | 79% | 2687 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,140 psi | 82% | 2713 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 39,871 psi | 64% | 2543 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,178 psi | 69% | 2592 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 36,303 psi | 58% | 2500 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 51,677 psi | 83% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,328 psi | 81% | 2740 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 49,385 psi | 79% | 2828 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 49,240 psi | 79% | 2684 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,698 psi | 65% | 2543 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 38,856 psi | 62% | 2523 fps | 96.2% |
| Lovex S071 | <<locked>> | 90% | 33,054 psi | 53% | 2425 fps | 95% |
| Norma 203B | <<locked>> | 80% | 49,719 psi | 80% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,020 psi | 72% | 2684 fps | 95.8% |
| Norma MRP | <<locked>> | 88% | 38,101 psi | 61% | 2631 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 37,463 psi | 60% | 2539 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 49,893 psi | 80% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 45,948 psi | 74% | 2772 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 36,274 psi | 58% | 2523 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 41,031 psi | 66% | 2654 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 45% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,819 psi | 77% | 2684 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,251 psi | 71% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,420 psi | 60% | 2562 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,303 psi | 58% | 2566 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,855 psi | 61% | 2654 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,082 psi | 82% | 2694 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,657 psi | 72% | 2635 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,151 psi | 74% | 2674 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 43,178 psi | 69% | 2671 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 41,771 psi | 67% | 2562 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,698 psi | 65% | 2543 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 49,240 psi | 79% | 2684 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,856 psi | 62% | 2523 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,701 psi | 73% | 2687 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,919 psi | 74% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,827 psi | 64% | 2487 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,786 psi | 69% | 2664 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 44,962 psi | 72% | 2635 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,517 psi | 81% | 2723 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 33,910 psi | 54% | 2497 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 38,522 psi | 62% | 2543 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,285 psi | 82% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,401 psi | 82% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,888 psi | 69% | 2562 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,972 psi | 62% | 2539 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 40,321 psi | 65% | 2572 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 49,676 psi | 80% | 2664 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,348 psi | 61% | 2539 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 29,689 psi | 48% | 2385 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 96% | 50,705 psi | 81% | 2867 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,072 psi | 61% | 2513 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 39,711 psi | 64% | 2592 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,367 psi | 41% | 2336 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,381 psi | 70% | 2641 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 89 powders for .300 H&H Mag. loaded with the .308 | 180gr | Sierra Pro-Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,986 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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.