Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Sellier & Bellot FMJ-BT bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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 2495 | <<locked>> | 82% | 56,057 psi | 90% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,534 psi | 86% | 2756 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2854 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,376 psi | 90% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,534 psi | 86% | 2848 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,159 psi | 90% | 2822 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,447 psi | 87% | 2890 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,796 psi | 89% | 2943 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,796 psi | 89% | 2949 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,650 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,954 psi | 87% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,259 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,579 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,853 psi | 86% | 2881 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2940 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,962 psi | 72% | 2799 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,550 psi | 89% | 3012 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,125 psi | 80% | 2861 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 54,505 psi | 87% | 2815 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2940 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 53,766 psi | 86% | 2795 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 54,665 psi | 88% | 2828 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,637 psi | 89% | 2900 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 55,288 psi | 89% | 2858 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 98% | 55,956 psi | 90% | 2887 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,694 psi | 88% | 2867 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,679 psi | 88% | 2831 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,999 psi | 90% | 2861 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,019 psi | 71% | 2828 fps | 96.8% |
| Hodgdon Superformance | <<locked>> | 90% | 55,811 psi | 89% | 2936 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1762 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,695 psi | 89% | 2805 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,679 psi | 88% | 2789 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 54,868 psi | 88% | 2835 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,550 psi | 89% | 2828 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 53,925 psi | 86% | 2841 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,361 psi | 89% | 2848 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,969 psi | 87% | 2818 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2913 fps | 96.9% |
| Lovex S062 | <<locked>> | 84% | 56,115 psi | 90% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,680 psi | 89% | 2825 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 53,577 psi | 86% | 2815 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,730 psi | 73% | 2707 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 53,258 psi | 85% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,477 psi | 89% | 2881 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 54,230 psi | 87% | 2963 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 55,738 psi | 89% | 2887 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,925 psi | 86% | 2831 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2930 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 54,491 psi | 87% | 2887 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2802 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 60% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,737 psi | 88% | 2815 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,868 psi | 88% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,243 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,448 psi | 89% | 2953 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,888 psi | 70% | 2818 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 54,476 psi | 87% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,592 psi | 88% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,173 psi | 90% | 2861 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 52,968 psi | 85% | 2864 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 53,766 psi | 86% | 2795 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,680 psi | 89% | 2825 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,115 psi | 90% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,577 psi | 86% | 2815 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,043 psi | 90% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,579 psi | 89% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,201 psi | 89% | 2776 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,246 psi | 90% | 2917 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 54,520 psi | 87% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,317 psi | 87% | 2802 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 55,071 psi | 88% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,650 psi | 86% | 2841 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 54,897 psi | 88% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,056 psi | 88% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,724 psi | 89% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,360 psi | 87% | 2828 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2818 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 53,345 psi | 86% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,417 psi | 86% | 2831 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,128 psi | 87% | 2894 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,491 psi | 87% | 2953 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,882 psi | 86% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,898 psi | 90% | 2904 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,847 psi | 75% | 2933 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,606 psi | 86% | 2835 fps | 98% |
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 2495 | <<locked>> | 80% | 52,373 psi | 84% | 2687 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,951 psi | 80% | 2697 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,272 psi | 55% | 2470 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 49,632 psi | 80% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,985 psi | 61% | 2569 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 46,818 psi | 75% | 2674 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,959 psi | 67% | 2661 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 48,675 psi | 78% | 2818 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,837 psi | 83% | 2887 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,471 psi | 76% | 2700 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,546 psi | 81% | 2766 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,999 psi | 59% | 2579 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,003 psi | 67% | 2703 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,553 psi | 67% | 2651 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,916 psi | 67% | 2707 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,079 psi | 43% | 2333 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,692 psi | 52% | 2507 fps | 95.5% |
| Alliant Reloder-26 | 64.2 gr | 82% | 30,951 psi | 50% | 2500 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 41,350 psi | 66% | 2690 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 47,659 psi | 76% | 2707 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,916 psi | 67% | 2707 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 41,930 psi | 67% | 2582 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 48,124 psi | 77% | 2720 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 39,885 psi | 64% | 2615 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 42,757 psi | 69% | 2635 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 48,820 psi | 78% | 2769 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,111 psi | 82% | 2808 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,490 psi | 55% | 2470 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,431 psi | 84% | 2812 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,234 psi | 66% | 2762 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 38,740 psi | 62% | 2621 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 44% | 1572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,211 psi | 79% | 2703 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,517 psi | 83% | 2736 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,637 psi | 60% | 2510 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,337 psi | 69% | 2612 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 36,477 psi | 58% | 2520 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 51,837 psi | 83% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,630 psi | 76% | 2713 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 46,528 psi | 75% | 2792 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 49,443 psi | 79% | 2700 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,843 psi | 65% | 2562 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,175 psi | 63% | 2546 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 33,185 psi | 53% | 2444 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 49,879 psi | 80% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,366 psi | 68% | 2651 fps | 95.2% |
| Norma MRP | 66.9 gr | 88% | 38,348 psi | 61% | 2657 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 37,797 psi | 61% | 2562 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,285 psi | 81% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,412 psi | 74% | 2802 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,579 psi | 59% | 2546 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 96% | 41,176 psi | 66% | 2677 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 44% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,906 psi | 77% | 2700 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,628 psi | 72% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,724 psi | 60% | 2585 fps | 98.1% |
| ReloadSwiss RS 70 | 62.1 gr | 80% | 36,579 psi | 59% | 2592 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,189 psi | 61% | 2684 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 51,271 psi | 82% | 2713 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,049 psi | 72% | 2657 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,456 psi | 74% | 2697 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 40,611 psi | 65% | 2635 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,930 psi | 67% | 2582 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,843 psi | 65% | 2562 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,443 psi | 79% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,175 psi | 63% | 2546 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,050 psi | 74% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,079 psi | 74% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,943 psi | 64% | 2507 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,234 psi | 65% | 2628 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,165 psi | 72% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,720 psi | 81% | 2743 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 34,258 psi | 55% | 2523 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,841 psi | 62% | 2569 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 51,488 psi | 83% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,793 psi | 83% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,236 psi | 69% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,117 psi | 63% | 2562 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 40,567 psi | 65% | 2598 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 50,038 psi | 80% | 2684 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,638 psi | 62% | 2562 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 29,979 psi | 48% | 2411 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 94% | 47,659 psi | 76% | 2831 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,174 psi | 61% | 2530 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,045 psi | 64% | 2615 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,570 psi | 41% | 2362 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,642 psi | 70% | 2661 fps | 95.8% |
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 94 powders for .300 Win. Mag. loaded with the .308 | 180gr | Sellier & Bellot FMJ-BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,762 fps to 3,012 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2217 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Sellier & Bellot FMJ-BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.