Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Sellier & Bellot XRG bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Ramshot Grand 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.
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% | 55,767 psi | 89% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,534 psi | 87% | 2753 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2841 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 56,159 psi | 90% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,316 psi | 85% | 2841 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,014 psi | 90% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,027 psi | 87% | 2877 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2927 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,332 psi | 89% | 2936 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,534 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,577 psi | 86% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,925 psi | 86% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,013 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,447 psi | 86% | 2867 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,114 psi | 87% | 2923 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,271 psi | 82% | 2858 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,715 psi | 72% | 2785 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,998 psi | 88% | 2999 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 2848 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 54,230 psi | 87% | 2802 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,114 psi | 87% | 2923 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 53,737 psi | 86% | 2789 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,621 psi | 88% | 2818 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,765 psi | 85% | 2848 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 53,577 psi | 86% | 2822 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,302 psi | 87% | 2854 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,099 psi | 87% | 2815 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,115 psi | 90% | 2858 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,656 psi | 70% | 2812 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 90% | 55,419 psi | 89% | 2923 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 59% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,564 psi | 89% | 2805 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,085 psi | 88% | 2776 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,013 psi | 88% | 2789 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,867 psi | 86% | 2766 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 54,404 psi | 87% | 2818 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,230 psi | 89% | 2815 fps | 99.2% |
| IMR 4831 | <<locked>> | 96% | 54,694 psi | 88% | 2844 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,969 psi | 88% | 2831 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,548 psi | 86% | 2805 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 98% | 53,040 psi | 85% | 2904 fps | 96.8% |
| Lovex S062 | <<locked>> | 84% | 55,738 psi | 89% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,434 psi | 89% | 2812 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,345 psi | 86% | 2802 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,426 psi | 73% | 2694 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 52,939 psi | 85% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,303 psi | 89% | 2874 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 53,838 psi | 86% | 2949 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 55,477 psi | 89% | 2877 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,592 psi | 86% | 2818 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,678 psi | 84% | 2907 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 54,273 psi | 87% | 2877 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,417 psi | 86% | 2890 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 60% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,462 psi | 87% | 2802 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,505 psi | 87% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,026 psi | 85% | 2861 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,998 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2805 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 82% | 54,360 psi | 87% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,360 psi | 87% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,738 psi | 89% | 2848 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 56,260 psi | 90% | 2907 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 53,737 psi | 86% | 2789 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,434 psi | 89% | 2812 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,738 psi | 89% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,345 psi | 86% | 2802 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,753 psi | 89% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,187 psi | 88% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,998 psi | 88% | 2766 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,782 psi | 89% | 2904 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 54,201 psi | 87% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,809 psi | 86% | 2785 fps | 96.1% |
| Somchem S365 | <<locked>> | 94% | 54,810 psi | 88% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,287 psi | 85% | 2828 fps | 98.7% |
| Unknown powder | <<locked>> | 90% | 56,086 psi | 90% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 54,505 psi | 87% | 2661 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 54,650 psi | 88% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,186 psi | 87% | 2720 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,941 psi | 90% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,808 psi | 85% | 2795 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2776 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 53,853 psi | 86% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 53,374 psi | 86% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,751 psi | 86% | 2881 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,447 psi | 87% | 2946 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,447 psi | 86% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,765 psi | 85% | 2848 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,427 psi | 74% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,042 psi | 88% | 2848 fps | 98.2% |
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% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,904 psi | 72% | 2592 fps | 96.9% |
| Accurate 3100 | <<locked>> | 86% | 34,200 psi | 55% | 2461 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 49,632 psi | 80% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,956 psi | 61% | 2559 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 46,615 psi | 75% | 2664 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 41,785 psi | 67% | 2651 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 48,370 psi | 78% | 2805 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,416 psi | 82% | 2874 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,094 psi | 76% | 2684 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,401 psi | 81% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,869 psi | 59% | 2569 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,684 psi | 67% | 2690 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,336 psi | 66% | 2641 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,568 psi | 67% | 2690 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,108 psi | 43% | 2326 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,634 psi | 52% | 2500 fps | 95.4% |
| Alliant Reloder-26 | 63.3 gr | 82% | 30,893 psi | 50% | 2493 fps | 95.5% |
| Bofors RP15 | <<locked>> | 96% | 43,671 psi | 70% | 2733 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 47,601 psi | 76% | 2700 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,568 psi | 67% | 2690 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 41,843 psi | 67% | 2572 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 47,834 psi | 77% | 2707 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 43,149 psi | 69% | 2674 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 82% | 41,698 psi | 67% | 2605 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,720 psi | 81% | 2795 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,389 psi | 55% | 2464 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,110 psi | 79% | 2749 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,988 psi | 66% | 2749 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 38,609 psi | 62% | 2608 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 44% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,124 psi | 79% | 2703 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,634 psi | 83% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,847 psi | 74% | 2641 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,860 psi | 72% | 2608 fps | 97.6% |
| IMR 4350 | <<locked>> | 80% | 37,565 psi | 60% | 2500 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,192 psi | 69% | 2602 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 33,054 psi | 53% | 2431 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 51,706 psi | 83% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,459 psi | 81% | 2753 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 46,427 psi | 74% | 2782 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 49,313 psi | 79% | 2690 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,799 psi | 65% | 2556 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,146 psi | 63% | 2539 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 33,098 psi | 53% | 2434 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 49,763 psi | 80% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,163 psi | 68% | 2638 fps | 95.1% |
| Norma MRP | 66 gr | 88% | 38,247 psi | 61% | 2648 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,724 psi | 60% | 2556 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 49,966 psi | 80% | 2762 fps | 100% |
| Ramshot Grand | 71.1 gr | 92% | 45,469 psi | 73% | 2776 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 36,521 psi | 59% | 2543 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 92% | 39,552 psi | 63% | 2631 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 45% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,863 psi | 77% | 2694 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,280 psi | 71% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,507 psi | 60% | 2572 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,405 psi | 58% | 2579 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,927 psi | 61% | 2671 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,126 psi | 82% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,962 psi | 72% | 2651 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,021 psi | 74% | 2684 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 43,279 psi | 69% | 2684 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 41,843 psi | 67% | 2572 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,799 psi | 65% | 2556 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,313 psi | 79% | 2690 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,146 psi | 63% | 2539 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,934 psi | 74% | 2700 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,093 psi | 74% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,943 psi | 64% | 2500 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,888 psi | 69% | 2677 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 45,063 psi | 72% | 2644 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,459 psi | 81% | 2730 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,142 psi | 55% | 2513 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 38,682 psi | 62% | 2559 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 40,509 psi | 65% | 2608 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,401 psi | 82% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,517 psi | 83% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,937 psi | 82% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,682 psi | 62% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,654 psi | 65% | 2582 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 92% | 39,189 psi | 63% | 2562 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,488 psi | 81% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,104 psi | 66% | 2625 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,965 psi | 48% | 2405 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 47,776 psi | 77% | 2828 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,145 psi | 61% | 2523 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 43,149 psi | 69% | 2674 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,570 psi | 41% | 2356 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,553 psi | 67% | 2615 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 90 powders for .300 Win. Mag. loaded with the .308 | 180gr | Sellier & Bellot XRG. Alliant Reloder-26 delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,755 fps to 2,999 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, Ramshot Grand, Norma MRP rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Sellier & Bellot XRG 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.