Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 175gr | Lapua ScenarL bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Alliant Reloder-26 and Accurate MAGPRO.
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% | 56,985 psi | 89% | 2890 fps | 99.3% |
| Accurate 3100 | <<locked>> | 98% | 56,376 psi | 88% | 2943 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,898 psi | 89% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,505 psi | 85% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,897 psi | 86% | 3031 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 56,217 psi | 88% | 2897 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,288 psi | 87% | 2982 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 56,666 psi | 89% | 3038 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 2746 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,421 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,537 psi | 90% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,259 psi | 87% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,420 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,752 psi | 86% | 2969 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,188 psi | 88% | 3035 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2949 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,566 psi | 90% | 3100 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3012 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 54,795 psi | 86% | 2887 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,092 psi | 71% | 2864 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 56,188 psi | 88% | 3035 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 57,450 psi | 90% | 2933 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,631 psi | 76% | 2887 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 55,129 psi | 86% | 2910 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,362 psi | 88% | 2986 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,738 psi | 87% | 2943 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 56,855 psi | 89% | 2976 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,463 psi | 87% | 2956 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,637 psi | 87% | 2913 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,269 psi | 76% | 2992 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,855 psi | 89% | 3025 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1837 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,811 psi | 87% | 2884 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,376 psi | 87% | 2917 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,564 psi | 87% | 2904 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,839 psi | 86% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,491 psi | 85% | 2904 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 54,244 psi | 85% | 3009 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 56,101 psi | 88% | 2874 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,941 psi | 88% | 2904 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,522 psi | 90% | 2949 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 2844 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,855 psi | 89% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,115 psi | 88% | 2966 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 55,970 psi | 88% | 3058 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 56,623 psi | 89% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,824 psi | 86% | 3031 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 55,332 psi | 87% | 2969 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2963 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,868 psi | 86% | 2894 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,825 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,244 psi | 85% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,434 psi | 88% | 3038 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2989 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 55,114 psi | 86% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,681 psi | 89% | 2949 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 57,696 psi | 90% | 3012 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 88% | 57,450 psi | 90% | 2933 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,941 psi | 88% | 2904 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,101 psi | 88% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,522 psi | 90% | 2949 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,478 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,361 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,448 psi | 87% | 2854 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,261 psi | 90% | 3009 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 54,969 psi | 86% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,766 psi | 86% | 2884 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 56,565 psi | 89% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,665 psi | 86% | 2930 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 56,159 psi | 88% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,056 psi | 86% | 2913 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 2959 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 56,913 psi | 89% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,667 psi | 90% | 2966 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,796 psi | 87% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,014 psi | 88% | 3048 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 2953 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,578 psi | 86% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,594 psi | 89% | 2989 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,563 psi | 84% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,737 psi | 86% | 2923 fps | 98.5% |
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% | 53,287 psi | 84% | 2831 fps | 98.9% |
| Accurate 3100 | <<locked>> | 82% | 32,779 psi | 51% | 2490 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 53,374 psi | 84% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,379 psi | 65% | 2700 fps | 99.3% |
| Accurate MAGPRO | 80.6 gr | 94% | 51,126 psi | 80% | 2963 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 49,777 psi | 78% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,496 psi | 67% | 2740 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 46,267 psi | 73% | 2848 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 36,666 psi | 57% | 2680 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,807 psi | 80% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,027 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,813 psi | 62% | 2710 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,730 psi | 72% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,192 psi | 66% | 2733 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,045 psi | 63% | 2726 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,486 psi | 46% | 2461 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,386 psi | 49% | 2530 fps | 95.2% |
| Alliant Reloder-26 | 69.3 gr | 80% | 31,691 psi | 50% | 2575 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 42,380 psi | 66% | 2776 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,343 psi | 80% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,163 psi | 66% | 2805 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 40,045 psi | 63% | 2726 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,773 psi | 70% | 2710 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 42,525 psi | 67% | 2762 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 51,532 psi | 81% | 2851 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,207 psi | 68% | 2749 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,919 psi | 72% | 2769 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,588 psi | 78% | 2854 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,559 psi | 76% | 2838 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,507 psi | 59% | 2598 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,610 psi | 62% | 2792 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 42,206 psi | 66% | 2762 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 43% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,388 psi | 82% | 2828 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,422 psi | 63% | 2638 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,122 psi | 72% | 2740 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 39,610 psi | 62% | 2651 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,109 psi | 75% | 2792 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 47,297 psi | 74% | 2881 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 52,866 psi | 83% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,758 psi | 69% | 2690 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 42,003 psi | 66% | 2671 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 32,068 psi | 50% | 2470 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 53,359 psi | 84% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,888 psi | 67% | 2730 fps | 95.8% |
| Norma MRP | <<locked>> | 84% | 36,666 psi | 57% | 2677 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 40,872 psi | 64% | 2694 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 44,193 psi | 69% | 2831 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 39,682 psi | 62% | 2680 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 39,349 psi | 62% | 2703 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,358 psi | 80% | 2835 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,530 psi | 76% | 2887 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,234 psi | 65% | 2720 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,653 psi | 62% | 2730 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,434 psi | 57% | 2707 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 48,385 psi | 76% | 2782 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,005 psi | 69% | 2723 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 41,437 psi | 65% | 2717 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,773 psi | 70% | 2710 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,758 psi | 69% | 2690 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,866 psi | 83% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,003 psi | 66% | 2671 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,574 psi | 78% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,037 psi | 77% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,743 psi | 67% | 2631 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,075 psi | 64% | 2713 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,428 psi | 76% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,051 psi | 75% | 2769 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,594 psi | 59% | 2651 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,840 psi | 58% | 2585 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,282 psi | 73% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,293 psi | 66% | 2690 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,928 psi | 61% | 2625 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,316 psi | 84% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,698 psi | 65% | 2690 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,851 psi | 51% | 2539 fps | 97.7% |
| Vihtavuori N560 | 77.4 gr | 92% | 48,704 psi | 76% | 2920 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 44,962 psi | 70% | 2831 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,263 psi | 65% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,381 psi | 68% | 2753 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,107 psi | 41% | 2441 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,481 psi | 65% | 2684 fps | 95.5% |
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 88 powders for .300 Weath. Mag. loaded with the .308 | 175gr | Lapua ScenarL. Alliant Reloder-26 delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,100 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Vihtavuori N560, Alliant Reloder-26, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 175gr | Lapua ScenarL they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, Norma 217, ReloadSwiss RS 80 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.