Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Fox Classic Hunter bullet and 89 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 2495 | <<locked>> | 82% | 57,421 psi | 90% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,274 psi | 87% | 2818 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2923 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 54,418 psi | 85% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,738 psi | 87% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,492 psi | 89% | 3018 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 54,650 psi | 86% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,043 psi | 89% | 2966 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 54,650 psi | 86% | 2963 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,260 psi | 58% | 2661 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,651 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,767 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,840 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,404 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,333 psi | 88% | 2953 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,896 psi | 84% | 2956 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,195 psi | 74% | 2871 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,868 psi | 86% | 3025 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 2936 fps | 98.4% |
| Bofors RP3 | <<locked>> | 84% | 56,521 psi | 89% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,896 psi | 84% | 2956 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 55,738 psi | 87% | 2864 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2812 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 84% | 56,855 psi | 89% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,462 psi | 85% | 2913 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 57,551 psi | 90% | 2930 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 54,737 psi | 86% | 2904 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,392 psi | 90% | 2946 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,246 psi | 90% | 2894 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,079 psi | 72% | 2910 fps | 98% |
| Hodgdon Superformance | <<locked>> | 88% | 54,592 psi | 86% | 2949 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1798 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,580 psi | 90% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,507 psi | 89% | 2854 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 57,087 psi | 89% | 2904 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,551 psi | 90% | 2894 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 56,289 psi | 88% | 2907 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,232 psi | 90% | 2904 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,188 psi | 88% | 2894 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,941 psi | 88% | 2999 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,375 psi | 85% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,580 psi | 90% | 2887 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,579 psi | 87% | 2881 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2772 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 55,056 psi | 86% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,244 psi | 85% | 2897 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 57,566 psi | 90% | 3041 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 54,650 psi | 86% | 2900 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,115 psi | 88% | 2890 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3015 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 92% | 57,043 psi | 89% | 2956 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,386 psi | 79% | 2884 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1837 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,695 psi | 89% | 2877 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,940 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,941 psi | 88% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,331 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2910 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 56,101 psi | 88% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,652 psi | 89% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,868 psi | 86% | 2877 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 55,521 psi | 87% | 2940 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 55,738 psi | 87% | 2864 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,580 psi | 90% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,375 psi | 85% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,579 psi | 87% | 2881 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,752 psi | 86% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,377 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,246 psi | 90% | 2841 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,056 psi | 86% | 2933 fps | 98.8% |
| Somchem S355 | <<locked>> | 86% | 56,521 psi | 89% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,550 psi | 89% | 2871 fps | 97.3% |
| Somchem S365 | <<locked>> | 92% | 54,259 psi | 85% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,115 psi | 88% | 2913 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 56,681 psi | 89% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,927 psi | 89% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,317 psi | 85% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,594 psi | 89% | 2890 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2890 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 55,085 psi | 86% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,782 psi | 87% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,058 psi | 89% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,653 psi | 90% | 3035 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 2874 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,463 psi | 88% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,462 psi | 85% | 2913 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,720 psi | 79% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,434 psi | 88% | 2910 fps | 98.8% |
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% | 53,824 psi | 84% | 2740 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,576 psi | 81% | 2762 fps | 98.7% |
| Accurate 3100 | <<locked>> | 84% | 33,141 psi | 52% | 2467 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,111 psi | 80% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,291 psi | 62% | 2621 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 48,936 psi | 77% | 2887 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 48,269 psi | 76% | 2730 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,712 psi | 64% | 2667 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 44,556 psi | 70% | 2776 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 34,998 psi | 55% | 2602 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,921 psi | 77% | 2753 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,170 psi | 82% | 2822 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,276 psi | 60% | 2638 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,787 psi | 69% | 2762 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,538 psi | 64% | 2661 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,988 psi | 64% | 2713 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,934 psi | 44% | 2385 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,792 psi | 50% | 2513 fps | 95.6% |
| Alliant Reloder-26 | 67 gr | 80% | 29,950 psi | 47% | 2497 fps | 95.6% |
| Bofors RP15 | <<locked>> | 92% | 40,393 psi | 63% | 2700 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 49,298 psi | 77% | 2766 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,988 psi | 64% | 2713 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 43,207 psi | 68% | 2641 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 43,555 psi | 68% | 2746 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,676 psi | 78% | 2779 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,510 psi | 65% | 2677 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 44,324 psi | 69% | 2697 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 47,616 psi | 75% | 2782 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,775 psi | 73% | 2766 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,795 psi | 56% | 2526 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,379 psi | 63% | 2779 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 40,408 psi | 63% | 2687 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1604 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,778 psi | 80% | 2762 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,953 psi | 83% | 2799 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 38,841 psi | 61% | 2569 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,730 psi | 70% | 2674 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 37,710 psi | 59% | 2575 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 53,577 psi | 84% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,340 psi | 73% | 2720 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 45,556 psi | 71% | 2808 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 50,894 psi | 80% | 2756 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,090 psi | 66% | 2621 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 40,379 psi | 63% | 2602 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 32,111 psi | 50% | 2444 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,517 psi | 81% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,191 psi | 65% | 2654 fps | 95.4% |
| Norma MRP | 69.9 gr | 86% | 37,347 psi | 59% | 2661 fps | 96% |
| Norma URP | <<locked>> | 80% | 39,204 psi | 61% | 2621 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 52,315 psi | 82% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,339 psi | 71% | 2818 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 38,043 psi | 60% | 2608 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 37,463 psi | 59% | 2625 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 44% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,545 psi | 78% | 2762 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,586 psi | 73% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,247 psi | 62% | 2644 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,985 psi | 60% | 2654 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,173 psi | 58% | 2694 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 52,707 psi | 83% | 2769 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,485 psi | 73% | 2710 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,194 psi | 71% | 2707 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 39,653 psi | 62% | 2641 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 43,207 psi | 68% | 2641 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,090 psi | 66% | 2621 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 50,894 psi | 80% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,379 psi | 63% | 2602 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,892 psi | 75% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,659 psi | 75% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,205 psi | 65% | 2566 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,291 psi | 62% | 2638 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 46,673 psi | 73% | 2710 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,443 psi | 77% | 2756 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,650 psi | 56% | 2575 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,666 psi | 59% | 2572 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 53,388 psi | 84% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,490 psi | 84% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,672 psi | 70% | 2641 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,524 psi | 64% | 2618 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 39,668 psi | 62% | 2608 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 51,634 psi | 81% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,987 psi | 63% | 2618 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 30,980 psi | 49% | 2461 fps | 97.2% |
| Vihtavuori N560 | 74.8 gr | 92% | 46,659 psi | 73% | 2841 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 98% | 45,745 psi | 72% | 2812 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,711 psi | 62% | 2589 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,510 psi | 65% | 2677 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,598 psi | 39% | 2356 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,537 psi | 62% | 2608 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 95 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Fox Classic Hunter. Norma MRP delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,798 fps to 3,041 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2217, ADI AR 2225 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 | 180gr | Fox Classic Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, 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.