Load Specifications
Load data in caliber .300 Win. Mag. with .311 | 180gr | Sellier & Bellot SPRN bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 2700 | <<locked>> | 82% | 55,535 psi | 89% | 2802 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 54,433 psi | 87% | 2854 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,216 psi | 89% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,405 psi | 90% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 52,765 psi | 85% | 2933 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 54,882 psi | 88% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,403 psi | 86% | 2887 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 54,781 psi | 88% | 2943 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,592 psi | 86% | 2884 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,028 psi | 90% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,101 psi | 90% | 2861 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,461 psi | 86% | 2900 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,462 psi | 87% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,895 psi | 85% | 2874 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,099 psi | 87% | 2940 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,456 psi | 76% | 2858 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,926 psi | 88% | 3005 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,040 psi | 85% | 2920 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 53,403 psi | 86% | 2808 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,099 psi | 87% | 2940 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 56,043 psi | 90% | 2848 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,862 psi | 75% | 2792 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 53,461 psi | 86% | 2822 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,636 psi | 88% | 2894 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,114 psi | 87% | 2851 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 96% | 54,839 psi | 88% | 2884 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,621 psi | 86% | 2864 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,751 psi | 86% | 2825 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,412 psi | 74% | 2894 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 54,679 psi | 88% | 2930 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 59% | 1781 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,317 psi | 87% | 2799 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,737 psi | 86% | 2828 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,128 psi | 87% | 2818 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 53,026 psi | 85% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,852 psi | 85% | 2815 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2972 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 54,766 psi | 88% | 2792 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,520 psi | 87% | 2818 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,796 psi | 89% | 2861 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2759 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 55,448 psi | 89% | 2848 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,433 psi | 87% | 2881 fps | 98.3% |
| Norma MRP | <<locked>> | 96% | 53,577 psi | 86% | 2959 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 54,781 psi | 88% | 2881 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,362 psi | 90% | 2874 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,721 psi | 85% | 2930 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 53,606 psi | 86% | 2881 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,618 psi | 81% | 2867 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 60% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,374 psi | 86% | 2805 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,853 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,304 psi | 90% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,592 psi | 88% | 2953 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2890 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 84% | 53,490 psi | 86% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,042 psi | 88% | 2861 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 55,840 psi | 90% | 2920 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 56,043 psi | 90% | 2848 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,520 psi | 87% | 2818 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,766 psi | 88% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,796 psi | 89% | 2861 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,984 psi | 88% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,128 psi | 87% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,969 psi | 87% | 2772 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,361 psi | 89% | 2917 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 53,417 psi | 86% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,214 psi | 85% | 2799 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 54,462 psi | 87% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,347 psi | 90% | 2894 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 54,607 psi | 88% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,417 psi | 86% | 2825 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,796 psi | 89% | 2871 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 55,288 psi | 89% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,072 psi | 90% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,693 psi | 86% | 2894 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,766 psi | 86% | 2949 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,530 psi | 79% | 2861 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,823 psi | 85% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,810 psi | 88% | 2897 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,676 psi | 81% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,750 psi | 85% | 2831 fps | 98.1% |
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% | 51,967 psi | 83% | 2746 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 33,823 psi | 54% | 2464 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 51,837 psi | 83% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,132 psi | 64% | 2621 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 48,994 psi | 79% | 2867 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,646 psi | 78% | 2717 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,205 psi | 66% | 2657 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 94% | 47,848 psi | 77% | 2818 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,321 psi | 66% | 2657 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,429 psi | 79% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,721 psi | 85% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,754 psi | 62% | 2628 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,034 psi | 71% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,901 psi | 66% | 2648 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,278 psi | 66% | 2700 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,471 psi | 46% | 2382 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,314 psi | 52% | 2507 fps | 95.7% |
| Alliant Reloder-26 | 65.5 gr | 80% | 30,530 psi | 49% | 2493 fps | 95.7% |
| Bofors RP15 | <<locked>> | 92% | 40,770 psi | 65% | 2687 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 49,893 psi | 80% | 2753 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,278 psi | 66% | 2700 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 43,613 psi | 70% | 2628 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 43,874 psi | 70% | 2733 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,154 psi | 80% | 2766 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,771 psi | 67% | 2661 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,657 psi | 72% | 2680 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 47,848 psi | 77% | 2766 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,227 psi | 81% | 2808 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,361 psi | 58% | 2520 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,712 psi | 65% | 2762 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 40,843 psi | 65% | 2677 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 44% | 1588 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,198 psi | 82% | 2749 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,204 psi | 63% | 2556 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,991 psi | 72% | 2657 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 38,421 psi | 62% | 2572 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,702 psi | 75% | 2707 fps | 95% |
| IMR 7828 SSC | <<locked>> | 94% | 45,687 psi | 73% | 2789 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 51,474 psi | 83% | 2743 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,554 psi | 68% | 2608 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 40,872 psi | 66% | 2592 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 32,953 psi | 53% | 2444 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 52,083 psi | 84% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,510 psi | 67% | 2641 fps | 95.3% |
| Norma MRP | 68.4 gr | 86% | 37,913 psi | 61% | 2654 fps | 96% |
| Norma URP | <<locked>> | 80% | 39,639 psi | 64% | 2608 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 52,489 psi | 84% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,600 psi | 73% | 2799 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 38,377 psi | 62% | 2595 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 37,884 psi | 61% | 2615 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 45% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,980 psi | 80% | 2749 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,760 psi | 75% | 2799 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,842 psi | 64% | 2635 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,348 psi | 61% | 2641 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,695 psi | 60% | 2684 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 47,036 psi | 75% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,498 psi | 73% | 2694 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 40,016 psi | 64% | 2631 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,613 psi | 70% | 2628 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,554 psi | 68% | 2608 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 51,474 psi | 83% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,872 psi | 66% | 2592 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,095 psi | 77% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,790 psi | 77% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,698 psi | 67% | 2556 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,653 psi | 64% | 2628 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 47,094 psi | 76% | 2697 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,850 psi | 80% | 2743 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 36,114 psi | 58% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,145 psi | 61% | 2562 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 45,063 psi | 72% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,089 psi | 66% | 2608 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 40,147 psi | 64% | 2598 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 52,040 psi | 83% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,509 psi | 65% | 2612 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 31,749 psi | 51% | 2461 fps | 97.4% |
| Vihtavuori N560 | 73.2 gr | 92% | 47,021 psi | 75% | 2828 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 46,195 psi | 74% | 2802 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,045 psi | 64% | 2579 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,974 psi | 67% | 2664 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,193 psi | 40% | 2359 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,045 psi | 64% | 2598 fps | 95% |
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 83 powders for .300 Win. Mag. loaded with the .311 | 180gr | Sellier & Bellot SPRN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,005 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 83 of the 83 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 0.311" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .311 | 180gr | Sellier & Bellot SPRN 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.