Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Nosler AccuBond bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 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.
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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% | 57,217 psi | 90% | 2851 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 56,840 psi | 89% | 2910 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,232 psi | 90% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,650 psi | 86% | 2894 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,216 psi | 87% | 2999 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 56,594 psi | 89% | 2861 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,550 psi | 87% | 2946 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 56,869 psi | 89% | 3002 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,378 psi | 62% | 2717 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,259 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,579 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,884 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,042 psi | 86% | 2933 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,420 psi | 88% | 2995 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 2969 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,458 psi | 78% | 2913 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,751 psi | 84% | 3005 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2979 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 55,230 psi | 87% | 2851 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,513 psi | 71% | 2835 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 56,420 psi | 88% | 2995 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 57,725 psi | 90% | 2894 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 2854 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 55,332 psi | 87% | 2871 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,768 psi | 89% | 2949 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 56,014 psi | 88% | 2907 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 96% | 57,000 psi | 89% | 2940 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,811 psi | 87% | 2923 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,796 psi | 87% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2963 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 88% | 57,058 psi | 89% | 2986 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1801 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,130 psi | 88% | 2848 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,535 psi | 87% | 2877 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,767 psi | 87% | 2867 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 55,216 psi | 87% | 2890 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,752 psi | 86% | 2871 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,462 psi | 85% | 2976 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 56,391 psi | 88% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,202 psi | 88% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,653 psi | 90% | 2910 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2812 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 57,261 psi | 90% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,391 psi | 88% | 2933 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 56,217 psi | 88% | 3018 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 56,797 psi | 89% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,114 psi | 86% | 2995 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 55,579 psi | 87% | 2933 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,229 psi | 83% | 2930 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 59% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,100 psi | 86% | 2858 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,188 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,708 psi | 86% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,826 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,805 psi | 76% | 2959 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 55,303 psi | 87% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,942 psi | 89% | 2913 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 54,331 psi | 85% | 2920 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,725 psi | 90% | 2894 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,202 psi | 88% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,391 psi | 88% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,653 psi | 90% | 2910 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,782 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,666 psi | 87% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,767 psi | 87% | 2822 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,595 psi | 90% | 2972 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 55,172 psi | 86% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,143 psi | 86% | 2851 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 56,855 psi | 89% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,984 psi | 86% | 2894 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 56,391 psi | 88% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,187 psi | 86% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,433 psi | 85% | 2874 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 57,101 psi | 89% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,331 psi | 85% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,130 psi | 88% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,260 psi | 88% | 3015 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2923 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,636 psi | 86% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,768 psi | 89% | 2949 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,766 psi | 84% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,926 psi | 86% | 2887 fps | 98.7% |
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% | 53,490 psi | 84% | 2795 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 33,069 psi | 52% | 2461 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 53,664 psi | 84% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,713 psi | 65% | 2671 fps | 99.4% |
| Accurate MAGPRO | 77.6 gr | 92% | 47,834 psi | 75% | 2864 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,995 psi | 78% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,972 psi | 63% | 2651 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 46,528 psi | 73% | 2815 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 34,679 psi | 54% | 2592 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,850 psi | 80% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,045 psi | 63% | 2677 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,992 psi | 72% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,871 psi | 62% | 2644 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,364 psi | 63% | 2697 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,675 psi | 47% | 2434 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,560 psi | 49% | 2503 fps | 95.7% |
| Alliant Reloder-26 | 68.2 gr | 80% | 31,908 psi | 50% | 2552 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 39,827 psi | 62% | 2684 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 51,706 psi | 81% | 2799 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,540 psi | 67% | 2776 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 40,364 psi | 63% | 2697 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,005 psi | 71% | 2677 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 42,670 psi | 67% | 2730 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,880 psi | 81% | 2815 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,366 psi | 68% | 2713 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 46,209 psi | 72% | 2736 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 46,615 psi | 73% | 2762 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,791 psi | 76% | 2802 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,724 psi | 59% | 2566 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,871 psi | 62% | 2766 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 42,540 psi | 67% | 2733 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 1611 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,620 psi | 82% | 2792 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,495 psi | 63% | 2605 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,340 psi | 73% | 2703 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 39,885 psi | 63% | 2618 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,440 psi | 71% | 2703 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 44,483 psi | 70% | 2789 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 53,142 psi | 83% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,976 psi | 69% | 2654 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 42,264 psi | 66% | 2641 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 32,227 psi | 51% | 2441 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,708 psi | 84% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,335 psi | 63% | 2638 fps | 95.2% |
| Norma MRP | 69.6 gr | 84% | 36,941 psi | 58% | 2651 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 41,147 psi | 64% | 2661 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 44,295 psi | 69% | 2795 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 40,001 psi | 63% | 2651 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 36,854 psi | 58% | 2608 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1650 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,517 psi | 81% | 2795 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,776 psi | 76% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,423 psi | 65% | 2687 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,856 psi | 62% | 2697 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,782 psi | 58% | 2680 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 48,689 psi | 76% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,251 psi | 69% | 2690 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 38,928 psi | 61% | 2625 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 45,005 psi | 71% | 2677 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,976 psi | 69% | 2654 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 53,142 psi | 83% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,264 psi | 66% | 2641 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,980 psi | 78% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,226 psi | 77% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,960 psi | 67% | 2602 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,595 psi | 60% | 2621 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 48,675 psi | 76% | 2743 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,283 psi | 76% | 2736 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,710 psi | 59% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,173 psi | 58% | 2559 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,557 psi | 73% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,554 psi | 67% | 2657 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 88% | 39,030 psi | 61% | 2592 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 53,650 psi | 84% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,003 psi | 66% | 2657 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 33,098 psi | 52% | 2510 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 45,672 psi | 72% | 2822 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 45,136 psi | 71% | 2799 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,481 psi | 65% | 2621 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,526 psi | 68% | 2717 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,339 psi | 41% | 2425 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,611 psi | 65% | 2651 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 88 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Nosler AccuBond. Winchester StaBALL HD delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,048 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 55–90 %, 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. 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. Accurate MAGPRO, Alliant Reloder-26, Norma MRP rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Nosler AccuBond they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Norma 217 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.