Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 200gr | Lapua Subsonic bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO 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 3100 | <<locked>> | 98% | 55,883 psi | 90% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,099 psi | 87% | 2717 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,201 psi | 87% | 2818 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 56,014 psi | 90% | 2680 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,723 psi | 88% | 2762 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 55,970 psi | 90% | 2818 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,667 psi | 62% | 2556 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,998 psi | 88% | 2762 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,780 psi | 86% | 2654 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,737 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,101 psi | 90% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,273 psi | 87% | 2753 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,361 psi | 89% | 2815 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,173 psi | 90% | 2785 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2736 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,707 psi | 85% | 2822 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2795 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 54,607 psi | 88% | 2671 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,570 psi | 71% | 2664 fps | 96.8% |
| Bofors RP5 | <<locked>> | 98% | 55,361 psi | 89% | 2815 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 53,824 psi | 86% | 2664 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,095 psi | 77% | 2684 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 54,882 psi | 88% | 2690 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,869 psi | 90% | 2766 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 55,376 psi | 89% | 2723 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 96% | 56,115 psi | 90% | 2759 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,071 psi | 88% | 2746 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,187 psi | 88% | 2694 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,688 psi | 76% | 2785 fps | 99% |
| Hodgdon Superformance | <<locked>> | 88% | 56,304 psi | 90% | 2805 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 59% | 1670 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,492 psi | 89% | 2661 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,056 psi | 88% | 2703 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,317 psi | 89% | 2690 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 54,433 psi | 87% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,954 psi | 87% | 2694 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 53,693 psi | 86% | 2795 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 56,014 psi | 90% | 2654 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,666 psi | 89% | 2687 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,737 psi | 86% | 2680 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,676 psi | 80% | 2641 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 55,666 psi | 89% | 2753 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 55,129 psi | 88% | 2838 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,159 psi | 90% | 2749 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,027 psi | 87% | 2812 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,868 psi | 88% | 2756 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2749 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 60% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,447 psi | 87% | 2674 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,608 psi | 89% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,867 psi | 86% | 2736 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,782 psi | 89% | 2815 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2782 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 54,926 psi | 88% | 2671 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,217 psi | 90% | 2733 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 53,650 psi | 86% | 2743 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 53,824 psi | 86% | 2664 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,666 psi | 89% | 2687 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,014 psi | 90% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,737 psi | 86% | 2680 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,318 psi | 90% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,245 psi | 89% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,085 psi | 88% | 2641 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,200 psi | 85% | 2736 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 54,650 psi | 88% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,389 psi | 87% | 2677 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 56,072 psi | 90% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,114 psi | 87% | 2717 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 55,898 psi | 90% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,679 psi | 88% | 2694 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,592 psi | 86% | 2697 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 53,853 psi | 86% | 2700 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,274 psi | 89% | 2766 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,158 psi | 88% | 2828 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 2749 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,012 psi | 87% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,130 psi | 90% | 2769 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,678 psi | 84% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,085 psi | 87% | 2713 fps | 99% |
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 3100 | <<locked>> | 80% | 30,458 psi | 49% | 2260 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 41,162 psi | 66% | 2503 fps | 99.6% |
| Accurate MAGPRO | 70.3 gr | 92% | 46,992 psi | 75% | 2694 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,559 psi | 79% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,552 psi | 63% | 2490 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 42,917 psi | 69% | 2585 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 34,113 psi | 55% | 2444 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,318 psi | 60% | 2438 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,546 psi | 81% | 2608 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,668 psi | 64% | 2513 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,281 psi | 73% | 2625 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,970 psi | 59% | 2431 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,202 psi | 60% | 2480 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,385 psi | 47% | 2293 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,283 psi | 47% | 2303 fps | 95.4% |
| Alliant Reloder-26 | 61.8 gr | 80% | 31,488 psi | 50% | 2405 fps | 97.4% |
| Bofors RP15 | <<locked>> | 88% | 36,883 psi | 59% | 2474 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 51,271 psi | 82% | 2625 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 38,986 psi | 63% | 2552 fps | 95% |
| Bofors RP5 | <<locked>> | 86% | 37,202 psi | 60% | 2480 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,730 psi | 72% | 2513 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 39,436 psi | 63% | 2513 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 51,343 psi | 82% | 2638 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,931 psi | 69% | 2549 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 45,861 psi | 74% | 2566 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 90% | 45,818 psi | 73% | 2592 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,005 psi | 72% | 2579 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,463 psi | 60% | 2408 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,811 psi | 59% | 2543 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,959 psi | 67% | 2569 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 44% | 1493 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,170 psi | 84% | 2615 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,190 psi | 64% | 2444 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,934 psi | 74% | 2536 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 39,523 psi | 63% | 2461 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,788 psi | 72% | 2536 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 43,845 psi | 70% | 2618 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,707 psi | 85% | 2612 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,642 psi | 70% | 2493 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 41,858 psi | 67% | 2480 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 29,863 psi | 48% | 2247 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 39,798 psi | 64% | 2474 fps | 95.8% |
| Norma MRP | 61.5 gr | 82% | 33,895 psi | 54% | 2431 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 40,698 psi | 65% | 2497 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 40,799 psi | 65% | 2569 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,494 psi | 63% | 2490 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 36,201 psi | 58% | 2454 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 45% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,010 psi | 82% | 2625 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,066 psi | 77% | 2667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,002 psi | 66% | 2526 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,450 psi | 63% | 2536 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,620 psi | 54% | 2457 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 48,196 psi | 77% | 2572 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,118 psi | 66% | 2474 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 38,493 psi | 62% | 2467 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,730 psi | 72% | 2513 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,642 psi | 70% | 2493 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 52,707 psi | 85% | 2612 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,858 psi | 67% | 2480 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,356 psi | 79% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,892 psi | 78% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,714 psi | 68% | 2444 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,145 psi | 61% | 2464 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 48,312 psi | 77% | 2569 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,628 psi | 72% | 2516 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,318 psi | 60% | 2457 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,418 psi | 55% | 2352 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 46,151 psi | 74% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,061 psi | 67% | 2490 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 36,085 psi | 58% | 2385 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 41,568 psi | 67% | 2497 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 32,764 psi | 53% | 2362 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 90% | 44,976 psi | 72% | 2654 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 41,437 psi | 66% | 2575 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,017 psi | 66% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,105 psi | 69% | 2552 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,976 psi | 42% | 2283 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,435 psi | 62% | 2441 fps | 95.6% |
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 79 powders for .300 Win. Mag. loaded with the .308 | 200gr | Lapua Subsonic. Winchester StaBALL HD delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,864 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 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 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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, Accurate MAGPRO, Norma MRP rank at the top here: for .300 Win. Mag. with the .308 | 200gr | Lapua Subsonic 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.