Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 200gr | Sako Hammerhead bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Vihtavuori N560 and Norma MRP.
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.
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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 2700 | <<locked>> | 84% | 55,390 psi | 89% | 2651 fps | 99.5% |
| Accurate 3100 | <<locked>> | 96% | 53,374 psi | 86% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,071 psi | 88% | 2730 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,231 psi | 90% | 2844 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 53,693 psi | 86% | 2651 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,753 psi | 89% | 2782 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 53,374 psi | 86% | 2782 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,599 psi | 72% | 2618 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,508 psi | 63% | 2579 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,534 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,956 psi | 90% | 2785 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,345 psi | 86% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,274 psi | 89% | 2772 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,968 psi | 85% | 2779 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,983 psi | 87% | 2756 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,748 psi | 80% | 2756 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,085 psi | 87% | 2844 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,535 psi | 89% | 2815 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 55,608 psi | 89% | 2687 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,658 psi | 73% | 2687 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 52,968 psi | 85% | 2779 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 54,679 psi | 88% | 2680 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2648 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 55,593 psi | 89% | 2703 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 54,317 psi | 87% | 2746 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 54,839 psi | 88% | 2720 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2766 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,028 psi | 90% | 2762 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,101 psi | 90% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,747 psi | 78% | 2808 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 53,374 psi | 86% | 2766 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 59% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,999 psi | 90% | 2671 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,607 psi | 88% | 2657 fps | 99.8% |
| IMR 4350 | <<locked>> | 90% | 55,854 psi | 90% | 2720 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,173 psi | 90% | 2707 fps | 99.8% |
| IMR 4831 | <<locked>> | 92% | 53,200 psi | 85% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,911 psi | 88% | 2713 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 55,129 psi | 88% | 2822 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 53,272 psi | 85% | 2654 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,563 psi | 87% | 2697 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2657 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 53,055 psi | 85% | 2717 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 56,376 psi | 90% | 2858 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 53,693 psi | 86% | 2717 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,708 psi | 88% | 2825 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,927 psi | 90% | 2772 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,521 psi | 89% | 2802 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 60% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,317 psi | 89% | 2690 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,881 psi | 85% | 2740 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,013 psi | 88% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,142 psi | 85% | 2779 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,950 psi | 78% | 2805 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 55,695 psi | 89% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,853 psi | 86% | 2700 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 54,723 psi | 88% | 2759 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 54,679 psi | 88% | 2680 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,272 psi | 85% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,563 psi | 87% | 2697 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,650 psi | 86% | 2694 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,956 psi | 90% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,101 psi | 90% | 2661 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,259 psi | 87% | 2756 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 55,637 psi | 89% | 2680 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,172 psi | 88% | 2694 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 53,490 psi | 86% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,376 psi | 89% | 2736 fps | 99.7% |
| Unknown powder | <<locked>> | 86% | 54,186 psi | 87% | 2720 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,954 psi | 87% | 2618 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,491 psi | 87% | 2690 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2736 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 54,868 psi | 88% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,420 psi | 90% | 2782 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,229 psi | 85% | 2802 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2769 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,969 psi | 88% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,317 psi | 87% | 2746 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,215 psi | 87% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,997 psi | 85% | 2700 fps | 98.9% |
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 2700 | <<locked>> | 80% | 48,573 psi | 78% | 2546 fps | 98.8% |
| Accurate 3100 | <<locked>> | 80% | 31,212 psi | 50% | 2280 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 42,148 psi | 68% | 2523 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 94% | 48,646 psi | 78% | 2717 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,299 psi | 81% | 2598 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,710 psi | 60% | 2454 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 43,772 psi | 70% | 2608 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 41,872 psi | 67% | 2562 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 32,735 psi | 52% | 2408 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,314 psi | 82% | 2621 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,379 psi | 65% | 2530 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,282 psi | 74% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,579 psi | 60% | 2448 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,942 psi | 61% | 2497 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,994 psi | 48% | 2306 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,878 psi | 48% | 2323 fps | 95.8% |
| Alliant Reloder-26 | 63 gr | 80% | 32,329 psi | 52% | 2428 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 37,637 psi | 60% | 2490 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 52,025 psi | 83% | 2638 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,016 psi | 64% | 2575 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 37,942 psi | 61% | 2497 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,397 psi | 73% | 2530 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 96% | 40,176 psi | 64% | 2530 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 52,069 psi | 83% | 2654 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 47,427 psi | 76% | 2631 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 42,815 psi | 69% | 2513 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 92% | 43,526 psi | 70% | 2552 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,934 psi | 74% | 2598 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,203 psi | 61% | 2425 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,608 psi | 60% | 2566 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 42,743 psi | 69% | 2585 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 44% | 1496 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,559 psi | 79% | 2575 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,443 psi | 78% | 2559 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 40,843 psi | 65% | 2461 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,789 psi | 75% | 2556 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 36,564 psi | 59% | 2402 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,844 psi | 69% | 2503 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 42,018 psi | 67% | 2585 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 44,309 psi | 71% | 2507 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 42,525 psi | 68% | 2493 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 30,487 psi | 49% | 2264 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 40,611 psi | 65% | 2493 fps | 96.1% |
| Norma MRP | 62.6 gr | 82% | 34,621 psi | 56% | 2451 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 41,437 psi | 66% | 2513 fps | 99.7% |
| Ramshot Grand | <<locked>> | 86% | 40,727 psi | 65% | 2572 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,335 psi | 65% | 2507 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 86% | 35,491 psi | 57% | 2438 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 45% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,880 psi | 83% | 2638 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,110 psi | 79% | 2684 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,916 psi | 67% | 2543 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,234 psi | 65% | 2556 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,447 psi | 55% | 2484 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 49,023 psi | 79% | 2589 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,713 psi | 67% | 2487 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 36,869 psi | 59% | 2434 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 45,397 psi | 73% | 2530 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,309 psi | 71% | 2507 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 42,525 psi | 68% | 2493 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,299 psi | 81% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,676 psi | 80% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,352 psi | 70% | 2457 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,521 psi | 59% | 2428 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 49,095 psi | 79% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,484 psi | 73% | 2536 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 38,116 psi | 61% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,056 psi | 56% | 2365 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 44,570 psi | 71% | 2566 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 42,293 psi | 68% | 2441 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,686 psi | 72% | 2539 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 86% | 35,810 psi | 57% | 2379 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 45,150 psi | 72% | 2579 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,475 psi | 54% | 2379 fps | 98.8% |
| Vihtavuori N560 | 67.3 gr | 90% | 43,540 psi | 70% | 2628 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 42,554 psi | 68% | 2598 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,756 psi | 67% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,427 psi | 76% | 2631 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,556 psi | 43% | 2306 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,231 psi | 60% | 2415 fps | 95.2% |
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 80 powders for .300 Win. Mag. loaded with the .308 | 200gr | Sako Hammerhead. Winchester StaBALL HD delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,884 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 200.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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-26, Vihtavuori N560, Norma MRP rank at the top here: for .300 Win. Mag. with the .308 | 200gr | Sako Hammerhead 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.