Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 200gr | Speer Hot-Cor bullet and 81 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% | 55,143 psi | 88% | 2644 fps | 99.5% |
| Accurate 3100 | <<locked>> | 96% | 53,156 psi | 85% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,100 psi | 88% | 2733 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,985 psi | 90% | 2838 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 53,417 psi | 86% | 2644 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,738 psi | 89% | 2782 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 96% | 53,374 psi | 86% | 2779 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,440 psi | 71% | 2615 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,378 psi | 63% | 2575 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,534 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,709 psi | 89% | 2782 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,069 psi | 85% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,042 psi | 88% | 2766 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,391 psi | 90% | 2828 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,737 psi | 86% | 2756 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,516 psi | 79% | 2753 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,809 psi | 86% | 2838 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,274 psi | 89% | 2812 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 55,332 psi | 89% | 2684 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,455 psi | 73% | 2684 fps | 97.1% |
| Bofors RP5 | <<locked>> | 98% | 56,391 psi | 90% | 2828 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 54,476 psi | 87% | 2677 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,643 psi | 73% | 2641 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 55,579 psi | 89% | 2703 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 54,346 psi | 87% | 2743 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 54,795 psi | 88% | 2720 fps | 99.3% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,304 psi | 90% | 2766 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,043 psi | 90% | 2762 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,101 psi | 90% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,559 psi | 78% | 2802 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 53,098 psi | 85% | 2762 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 59% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,304 psi | 90% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,753 psi | 89% | 2667 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,360 psi | 87% | 2654 fps | 99.8% |
| IMR 4350 | <<locked>> | 90% | 55,854 psi | 90% | 2717 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,188 psi | 90% | 2707 fps | 99.8% |
| IMR 4831 | <<locked>> | 94% | 56,318 psi | 90% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,911 psi | 88% | 2710 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 96% | 54,868 psi | 88% | 2815 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 53,040 psi | 85% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,563 psi | 87% | 2697 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,763 psi | 81% | 2657 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 53,098 psi | 85% | 2717 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 52,417 psi | 84% | 2799 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 53,650 psi | 86% | 2717 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,723 psi | 88% | 2825 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,970 psi | 90% | 2772 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,317 psi | 89% | 2799 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 60% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,303 psi | 89% | 2690 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,405 psi | 90% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,752 psi | 88% | 2753 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,185 psi | 85% | 2782 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,820 psi | 78% | 2802 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 55,680 psi | 89% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,606 psi | 86% | 2697 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 54,505 psi | 87% | 2756 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 54,476 psi | 87% | 2677 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,040 psi | 85% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,563 psi | 87% | 2697 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,432 psi | 86% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,927 psi | 90% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,869 psi | 90% | 2657 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,041 psi | 87% | 2753 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 55,405 psi | 89% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,245 psi | 89% | 2694 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 53,505 psi | 86% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,100 psi | 88% | 2733 fps | 99.6% |
| Unknown powder | <<locked>> | 86% | 53,940 psi | 86% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,737 psi | 86% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,259 psi | 87% | 2687 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2733 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 54,824 psi | 88% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,159 psi | 90% | 2779 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,040 psi | 85% | 2799 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 2766 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,984 psi | 88% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,346 psi | 87% | 2743 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,911 psi | 86% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,779 psi | 85% | 2694 fps | 98.8% |
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% | 48,559 psi | 78% | 2543 fps | 98.8% |
| Accurate 3100 | <<locked>> | 80% | 31,009 psi | 50% | 2274 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 41,901 psi | 67% | 2520 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 94% | 48,689 psi | 78% | 2720 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 50,285 psi | 81% | 2598 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,710 psi | 60% | 2451 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 43,584 psi | 70% | 2602 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 41,698 psi | 67% | 2559 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 94% | 32,590 psi | 52% | 2402 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,285 psi | 82% | 2621 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,364 psi | 65% | 2526 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,224 psi | 74% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,521 psi | 60% | 2448 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,927 psi | 61% | 2500 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,950 psi | 48% | 2306 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,733 psi | 48% | 2316 fps | 95.7% |
| Alliant Reloder-26 | 62.8 gr | 80% | 32,155 psi | 52% | 2421 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 37,608 psi | 60% | 2490 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 52,025 psi | 83% | 2638 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 39,827 psi | 64% | 2572 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 37,927 psi | 61% | 2500 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,179 psi | 72% | 2523 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 96% | 40,030 psi | 64% | 2526 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 52,040 psi | 83% | 2651 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 47,413 psi | 76% | 2631 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 42,801 psi | 69% | 2513 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 92% | 43,497 psi | 70% | 2552 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,716 psi | 73% | 2592 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,985 psi | 61% | 2421 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,594 psi | 60% | 2566 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 42,714 psi | 68% | 2582 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 44% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,982 psi | 85% | 2635 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,559 psi | 79% | 2575 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,225 psi | 77% | 2556 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 40,799 psi | 65% | 2461 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,572 psi | 75% | 2552 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 36,361 psi | 58% | 2395 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,830 psi | 69% | 2503 fps | 95% |
| IMR 7828 SSC | <<locked>> | 88% | 41,829 psi | 67% | 2582 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 44,295 psi | 71% | 2507 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 42,511 psi | 68% | 2493 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 30,443 psi | 49% | 2260 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 40,408 psi | 65% | 2490 fps | 96.1% |
| Norma MRP | 62.5 gr | 82% | 34,621 psi | 56% | 2451 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 41,423 psi | 66% | 2510 fps | 99.6% |
| Ramshot Grand | <<locked>> | 86% | 40,741 psi | 65% | 2569 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,089 psi | 64% | 2500 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 86% | 35,302 psi | 57% | 2434 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 45% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,866 psi | 83% | 2638 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,081 psi | 79% | 2684 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,655 psi | 67% | 2539 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,045 psi | 64% | 2549 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,301 psi | 55% | 2480 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 48,950 psi | 78% | 2585 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,713 psi | 67% | 2487 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 36,666 psi | 59% | 2428 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 45,179 psi | 72% | 2523 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,295 psi | 71% | 2507 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 42,511 psi | 68% | 2493 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,082 psi | 80% | 2638 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,443 psi | 79% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,163 psi | 69% | 2451 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,332 psi | 58% | 2425 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 49,081 psi | 79% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,310 psi | 73% | 2530 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 38,058 psi | 61% | 2470 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,041 psi | 56% | 2365 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 44,353 psi | 71% | 2559 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 42,076 psi | 67% | 2438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,425 psi | 71% | 2533 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 86% | 35,650 psi | 57% | 2375 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 45,092 psi | 72% | 2579 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,446 psi | 54% | 2379 fps | 98.8% |
| Vihtavuori N560 | 67.2 gr | 90% | 43,569 psi | 70% | 2628 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 42,380 psi | 68% | 2595 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,756 psi | 67% | 2477 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,413 psi | 76% | 2631 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,411 psi | 42% | 2300 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 37,072 psi | 59% | 2411 fps | 95.1% |
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 86 powders for .300 Win. Mag. loaded with the .308 | 200gr | Speer Hot-Cor. Winchester StaBALL HD delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,881 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:13.5 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 | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N568 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.