Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 171gr | Peregrine VLR-5 bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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 2495 | <<locked>> | 82% | 56,405 psi | 88% | 2848 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,418 psi | 85% | 2877 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2976 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 57,087 psi | 89% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,723 psi | 86% | 2969 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,317 psi | 87% | 3068 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 57,319 psi | 90% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,840 psi | 88% | 3022 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3077 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,261 psi | 90% | 3077 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,592 psi | 86% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,737 psi | 86% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,811 psi | 87% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,159 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,390 psi | 87% | 3009 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3071 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,374 psi | 84% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,180 psi | 72% | 2920 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,548 psi | 84% | 3077 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,735 psi | 81% | 2989 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 55,332 psi | 87% | 2930 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3071 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 54,839 psi | 86% | 2923 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,912 psi | 88% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,174 psi | 90% | 3031 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 56,724 psi | 89% | 2989 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 98% | 57,551 psi | 90% | 3018 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,304 psi | 88% | 2999 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,956 psi | 88% | 2949 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,246 psi | 90% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2956 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,534 psi | 84% | 3005 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 57% | 1847 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,682 psi | 90% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,840 psi | 89% | 2930 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,811 psi | 87% | 2913 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,130 psi | 88% | 2959 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,681 psi | 89% | 2953 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 55,230 psi | 87% | 2963 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,202 psi | 88% | 2966 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,129 psi | 86% | 2943 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3048 fps | 97.3% |
| Lovex S062 | <<locked>> | 84% | 56,855 psi | 89% | 2920 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,550 psi | 89% | 2943 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,520 psi | 85% | 2933 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,717 psi | 73% | 2818 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 57,653 psi | 90% | 2976 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,174 psi | 90% | 3015 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 56,173 psi | 88% | 3094 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 57,217 psi | 90% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,056 psi | 86% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3068 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 56,130 psi | 88% | 3015 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,487 psi | 78% | 2933 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,724 psi | 87% | 2936 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,753 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,752 psi | 86% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,377 psi | 90% | 3087 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,281 psi | 71% | 2949 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,245 psi | 87% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,651 psi | 87% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,580 psi | 90% | 2992 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,578 psi | 86% | 2995 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,839 psi | 86% | 2923 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,550 psi | 89% | 2943 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,855 psi | 89% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,520 psi | 85% | 2933 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,334 psi | 90% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,492 psi | 89% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,188 psi | 88% | 2897 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,114 psi | 85% | 2989 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 55,448 psi | 87% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,550 psi | 87% | 2923 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 56,971 psi | 89% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,085 psi | 86% | 2969 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 55,811 psi | 87% | 2838 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,970 psi | 88% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,811 psi | 89% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,637 psi | 87% | 2953 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2940 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,099 psi | 85% | 2848 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,578 psi | 86% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,695 psi | 87% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,318 psi | 88% | 3084 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,274 psi | 87% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,174 psi | 90% | 3031 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,052 psi | 77% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,274 psi | 87% | 2963 fps | 98.3% |
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% | 52,939 psi | 83% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,821 psi | 80% | 2818 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 34,650 psi | 54% | 2566 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,198 psi | 79% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,406 psi | 60% | 2671 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 96% | 51,430 psi | 81% | 2999 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,558 psi | 75% | 2789 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,757 psi | 67% | 2776 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 46,760 psi | 73% | 2884 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,243 psi | 83% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,080 psi | 75% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,285 psi | 80% | 2884 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,579 psi | 59% | 2687 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,757 psi | 67% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,511 psi | 67% | 2769 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,960 psi | 67% | 2822 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,369 psi | 43% | 2428 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,243 psi | 52% | 2612 fps | 95.7% |
| Alliant Reloder-26 | 70.1 gr | 82% | 31,459 psi | 49% | 2598 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 42,366 psi | 66% | 2805 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,370 psi | 76% | 2822 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,960 psi | 67% | 2822 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,525 psi | 67% | 2694 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,776 psi | 76% | 2835 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,611 psi | 64% | 2726 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,497 psi | 68% | 2749 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 50,183 psi | 79% | 2894 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,124 psi | 77% | 2874 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,085 psi | 55% | 2575 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,621 psi | 84% | 2933 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,610 psi | 62% | 2818 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 39,697 psi | 62% | 2736 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,085 psi | 85% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,038 psi | 78% | 2825 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,330 psi | 82% | 2858 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,159 psi | 60% | 2618 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,048 psi | 69% | 2726 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,956 psi | 58% | 2621 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 52,620 psi | 82% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,689 psi | 76% | 2831 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 47,732 psi | 75% | 2917 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,111 psi | 79% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,423 psi | 65% | 2674 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,479 psi | 62% | 2648 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 33,591 psi | 53% | 2539 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 50,633 psi | 79% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,308 psi | 68% | 2766 fps | 95.5% |
| Norma MRP | 71.4 gr | 86% | 36,608 psi | 57% | 2703 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,261 psi | 60% | 2667 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 51,358 psi | 80% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,688 psi | 75% | 2927 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,188 psi | 58% | 2654 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 39,363 psi | 62% | 2730 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,834 psi | 77% | 2822 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,455 psi | 71% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,435 psi | 60% | 2694 fps | 98.2% |
| ReloadSwiss RS 70 | 67.8 gr | 80% | 37,260 psi | 58% | 2700 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,175 psi | 61% | 2805 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,982 psi | 81% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,426 psi | 71% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,413 psi | 74% | 2818 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,626 psi | 65% | 2753 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,525 psi | 67% | 2694 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,423 psi | 65% | 2674 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 50,111 psi | 79% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,479 psi | 62% | 2648 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,934 psi | 74% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 73% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,495 psi | 63% | 2615 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,249 psi | 65% | 2746 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 45,890 psi | 72% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,660 psi | 76% | 2808 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 34,824 psi | 55% | 2625 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,305 psi | 62% | 2671 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,388 psi | 82% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,446 psi | 82% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,714 psi | 69% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,726 psi | 62% | 2667 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 38,914 psi | 61% | 2654 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,734 psi | 80% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,146 psi | 61% | 2667 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,255 psi | 47% | 2503 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 94% | 48,994 psi | 77% | 2956 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,957 psi | 61% | 2641 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,799 psi | 64% | 2726 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,788 psi | 40% | 2454 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,597 psi | 65% | 2717 fps | 95.2% |
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 96 powders for .300 Weath. Mag. loaded with the .308 | 171gr | Peregrine VLR-5. Norma MRP delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,094 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 171.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2217 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .308 | 171gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.