Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 185gr | Lapua D46 bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Vihtavuori N560.
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>> | 82% | 55,434 psi | 89% | 2762 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 54,259 psi | 87% | 2815 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,143 psi | 88% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,159 psi | 90% | 2858 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 55,448 psi | 89% | 2956 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 52,518 psi | 84% | 2894 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 54,868 psi | 88% | 2776 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,316 psi | 85% | 2848 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 54,447 psi | 87% | 2900 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,536 psi | 60% | 2618 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,548 psi | 86% | 2844 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,548 psi | 86% | 2844 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,825 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,883 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,388 psi | 86% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,505 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,420 psi | 90% | 2894 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,722 psi | 86% | 2894 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,152 psi | 76% | 2815 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,679 psi | 88% | 2966 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,678 psi | 84% | 2877 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 53,229 psi | 85% | 2762 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,722 psi | 86% | 2894 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 55,927 psi | 90% | 2805 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,891 psi | 75% | 2759 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 53,505 psi | 86% | 2782 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,447 psi | 87% | 2854 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,027 psi | 87% | 2812 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 54,650 psi | 88% | 2844 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,461 psi | 86% | 2825 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,766 psi | 86% | 2785 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,166 psi | 74% | 2854 fps | 98% |
| Hodgdon Superformance | <<locked>> | 88% | 54,534 psi | 87% | 2887 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 59% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,433 psi | 87% | 2759 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,577 psi | 86% | 2785 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,230 psi | 87% | 2782 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 56,362 psi | 90% | 2844 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,217 psi | 90% | 2835 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2933 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 54,679 psi | 88% | 2753 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,418 psi | 87% | 2779 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,811 psi | 89% | 2822 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,211 psi | 77% | 2720 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 55,172 psi | 88% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,360 psi | 87% | 2838 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 53,534 psi | 86% | 2920 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 54,766 psi | 88% | 2841 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,043 psi | 90% | 2831 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,289 psi | 90% | 2953 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 53,534 psi | 86% | 2844 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2828 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 60% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,258 psi | 85% | 2766 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,838 psi | 86% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,028 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,389 psi | 87% | 2907 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 2851 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 84% | 53,534 psi | 86% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,984 psi | 88% | 2822 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 55,622 psi | 89% | 2881 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 55,927 psi | 90% | 2805 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,418 psi | 87% | 2779 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,679 psi | 88% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,811 psi | 89% | 2822 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,911 psi | 88% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,012 psi | 87% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,969 psi | 87% | 2733 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,158 psi | 88% | 2874 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 53,403 psi | 86% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,127 psi | 85% | 2759 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 54,317 psi | 87% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,159 psi | 90% | 2854 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 54,462 psi | 87% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,171 psi | 85% | 2782 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,477 psi | 89% | 2828 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 55,361 psi | 89% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,970 psi | 90% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,606 psi | 86% | 2854 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,737 psi | 86% | 2913 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,327 psi | 79% | 2822 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,318 psi | 90% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,694 psi | 88% | 2858 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,444 psi | 81% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,333 psi | 90% | 2851 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% | 51,822 psi | 83% | 2703 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 31,473 psi | 50% | 2375 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 51,909 psi | 83% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,001 psi | 64% | 2582 fps | 99.2% |
| Accurate High Country | <<locked>> | 90% | 44,904 psi | 72% | 2769 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 48,892 psi | 78% | 2831 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 48,515 psi | 78% | 2674 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,118 psi | 66% | 2621 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 44,599 psi | 72% | 2720 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 35,360 psi | 57% | 2559 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,205 psi | 66% | 2618 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,205 psi | 66% | 2618 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,327 psi | 79% | 2700 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,649 psi | 84% | 2769 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,609 psi | 62% | 2589 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,063 psi | 71% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,828 psi | 65% | 2612 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,191 psi | 66% | 2664 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,529 psi | 46% | 2352 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,300 psi | 52% | 2474 fps | 96% |
| Alliant Reloder-26 | 64 gr | 80% | 30,472 psi | 49% | 2464 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 40,640 psi | 65% | 2651 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 49,806 psi | 80% | 2710 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,191 psi | 66% | 2664 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 43,700 psi | 70% | 2595 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 43,816 psi | 70% | 2697 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,937 psi | 80% | 2723 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,742 psi | 67% | 2625 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,614 psi | 72% | 2644 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 47,819 psi | 77% | 2730 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,775 psi | 75% | 2710 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,216 psi | 58% | 2484 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,189 psi | 61% | 2667 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,654 psi | 65% | 2638 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 44% | 1565 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,053 psi | 82% | 2707 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,117 psi | 63% | 2520 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,889 psi | 72% | 2618 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 38,334 psi | 61% | 2536 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,514 psi | 75% | 2667 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 45,643 psi | 73% | 2753 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 51,314 psi | 82% | 2700 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,598 psi | 68% | 2572 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 40,770 psi | 65% | 2556 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 32,779 psi | 53% | 2408 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 52,011 psi | 83% | 2756 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,379 psi | 66% | 2605 fps | 95.5% |
| Norma MRP | 65.3 gr | 84% | 35,317 psi | 57% | 2559 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 39,523 psi | 63% | 2572 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 52,359 psi | 84% | 2776 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,469 psi | 73% | 2762 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 38,348 psi | 61% | 2562 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 37,753 psi | 61% | 2579 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 45% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,792 psi | 80% | 2710 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,789 psi | 75% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,697 psi | 64% | 2598 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,247 psi | 61% | 2605 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,507 psi | 60% | 2651 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 46,905 psi | 75% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,411 psi | 73% | 2654 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 39,914 psi | 64% | 2595 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,700 psi | 70% | 2595 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,598 psi | 68% | 2572 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 51,314 psi | 82% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,770 psi | 65% | 2556 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,095 psi | 77% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,805 psi | 77% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,640 psi | 67% | 2520 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,537 psi | 63% | 2589 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,166 psi | 76% | 2661 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,661 psi | 80% | 2703 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 36,027 psi | 58% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,029 psi | 61% | 2526 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 44,991 psi | 72% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,031 psi | 66% | 2572 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 37,434 psi | 60% | 2507 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 51,779 psi | 83% | 2680 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,306 psi | 65% | 2572 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 31,662 psi | 51% | 2428 fps | 97.6% |
| Vihtavuori N560 | 71.5 gr | 92% | 46,862 psi | 75% | 2789 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 45,934 psi | 74% | 2762 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,958 psi | 64% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,959 psi | 67% | 2631 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,179 psi | 40% | 2333 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,871 psi | 64% | 2562 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 86 powders for .300 Win. Mag. loaded with the .308 | 185gr | Lapua D46. Alliant Reloder-26 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,966 fps. ADI AR 2225 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 59–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:12.5 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. Norma MRP, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .300 Win. Mag. with the .308 | 185gr | Lapua D46 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.