Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 167gr | Lapua Scenar bullet and 87 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% | 56,101 psi | 88% | 2940 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 55,303 psi | 87% | 2989 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,825 psi | 87% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,043 psi | 89% | 3038 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,740 psi | 90% | 3140 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,506 psi | 87% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,244 psi | 85% | 3025 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 55,666 psi | 87% | 3081 fps | 97.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,418 psi | 85% | 3022 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,594 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,710 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,725 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,361 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,392 psi | 90% | 3074 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,100 psi | 86% | 3077 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,883 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,269 psi | 76% | 2989 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,333 psi | 88% | 3150 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,824 psi | 84% | 3054 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 57,711 psi | 90% | 2999 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,100 psi | 86% | 3077 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 56,768 psi | 89% | 2986 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2923 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,056 psi | 85% | 2959 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,390 psi | 87% | 3035 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,752 psi | 86% | 2989 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,695 psi | 87% | 3022 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,505 psi | 85% | 3002 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,491 psi | 85% | 2963 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,311 psi | 74% | 3031 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 88% | 55,622 psi | 87% | 3071 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 57% | 1880 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,897 psi | 86% | 2936 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,232 psi | 90% | 2972 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,360 psi | 85% | 2963 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,737 psi | 86% | 2956 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 57,479 psi | 90% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,985 psi | 89% | 3009 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3117 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,172 psi | 86% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,027 psi | 86% | 2953 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,478 psi | 89% | 2999 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2890 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,057 psi | 88% | 2989 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,114 psi | 86% | 3015 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 54,752 psi | 86% | 3104 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,535 psi | 87% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,043 psi | 89% | 3015 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3140 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,302 psi | 85% | 3018 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,735 psi | 81% | 3002 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 59% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,624 psi | 90% | 2999 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,795 psi | 86% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,145 psi | 90% | 3061 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,245 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,543 psi | 75% | 3028 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,217 psi | 90% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,201 psi | 85% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,738 psi | 87% | 2995 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,782 psi | 89% | 3061 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,768 psi | 89% | 2986 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,027 psi | 86% | 2953 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,172 psi | 86% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,478 psi | 89% | 2999 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,724 psi | 87% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,723 psi | 86% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,476 psi | 85% | 2904 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,318 psi | 88% | 3058 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 57,421 psi | 90% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,551 psi | 90% | 2989 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 55,448 psi | 87% | 3025 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,319 psi | 90% | 3035 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 57,638 psi | 90% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,667 psi | 90% | 2910 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,259 psi | 87% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,551 psi | 90% | 3015 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3005 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 55,898 psi | 88% | 2907 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,637 psi | 89% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,607 psi | 86% | 3031 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,853 psi | 86% | 3091 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 2995 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,435 psi | 90% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,608 psi | 87% | 3038 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,953 psi | 81% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,450 psi | 90% | 3028 fps | 98.6% |
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% | 52,547 psi | 82% | 2881 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,301 psi | 54% | 2582 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 52,446 psi | 82% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,495 psi | 63% | 2743 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 53,635 psi | 84% | 3071 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,037 psi | 77% | 2848 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,713 psi | 65% | 2782 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 48,660 psi | 76% | 2953 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,989 psi | 66% | 2782 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,937 psi | 78% | 2874 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,098 psi | 83% | 2943 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,073 psi | 61% | 2749 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,628 psi | 70% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,553 psi | 65% | 2776 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,945 psi | 66% | 2825 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,863 psi | 45% | 2497 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,735 psi | 51% | 2621 fps | 95.3% |
| Alliant Reloder-26 | 70.6 gr | 80% | 31,096 psi | 49% | 2612 fps | 95.4% |
| Bofors RP15 | <<locked>> | 92% | 41,510 psi | 65% | 2815 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 50,372 psi | 79% | 2884 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,945 psi | 66% | 2825 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 44,034 psi | 69% | 2756 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 44,643 psi | 70% | 2861 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,763 psi | 80% | 2900 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,293 psi | 66% | 2789 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,063 psi | 71% | 2812 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 52,112 psi | 82% | 2959 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,111 psi | 80% | 2943 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,724 psi | 58% | 2638 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,481 psi | 65% | 2894 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 41,423 psi | 65% | 2802 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1683 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,605 psi | 81% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,867 psi | 84% | 2917 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,711 psi | 62% | 2680 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,368 psi | 71% | 2782 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,783 psi | 61% | 2690 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,415 psi | 79% | 2894 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,543 psi | 73% | 2923 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 51,851 psi | 81% | 2877 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,033 psi | 67% | 2736 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,263 psi | 65% | 2713 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 33,475 psi | 52% | 2559 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 52,475 psi | 82% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,119 psi | 66% | 2769 fps | 95% |
| Norma MRP | 73.6 gr | 86% | 38,435 psi | 60% | 2776 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,045 psi | 63% | 2733 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,185 psi | 83% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,427 psi | 73% | 2933 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,986 psi | 61% | 2723 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 41,408 psi | 65% | 2802 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 44% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,575 psi | 79% | 2884 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,398 psi | 74% | 2933 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,408 psi | 63% | 2759 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,885 psi | 61% | 2769 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,363 psi | 60% | 2808 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,780 psi | 84% | 2890 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,471 psi | 74% | 2831 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,093 psi | 72% | 2822 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 40,611 psi | 64% | 2756 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,034 psi | 69% | 2756 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,033 psi | 67% | 2736 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 51,851 psi | 81% | 2877 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,263 psi | 65% | 2713 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,791 psi | 76% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,370 psi | 76% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,177 psi | 66% | 2680 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,989 psi | 67% | 2812 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 47,601 psi | 75% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,343 psi | 79% | 2867 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,738 psi | 58% | 2694 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,711 psi | 61% | 2684 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 54,288 psi | 85% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,201 psi | 85% | 2861 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,513 psi | 71% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,437 psi | 65% | 2733 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 40,669 psi | 64% | 2720 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 52,591 psi | 82% | 2858 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,002 psi | 64% | 2733 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,082 psi | 50% | 2575 fps | 97% |
| Vihtavuori N560 | 78.8 gr | 92% | 47,805 psi | 75% | 2959 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 47,181 psi | 74% | 2933 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,480 psi | 63% | 2697 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,482 psi | 67% | 2792 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,585 psi | 40% | 2464 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,468 psi | 68% | 2782 fps | 95.7% |
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 87 powders for .300 Weath. Mag. loaded with the .308 | 167gr | Lapua Scenar. Alliant Reloder-26 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,150 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 167.0 gr projectile in 0.308" calls for a 1:13.0 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 Weath. Mag. with the .308 | 167gr | Lapua Scenar 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.