Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 175gr | Prvi Partizan FMJ BT bullet and 85 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% | 56,594 psi | 89% | 2881 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 56,057 psi | 88% | 2936 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,449 psi | 88% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,143 psi | 85% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,549 psi | 85% | 3025 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 56,072 psi | 88% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,940 psi | 86% | 2972 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 56,391 psi | 88% | 3031 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2733 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,143 psi | 86% | 2969 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,276 psi | 90% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,348 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,839 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,231 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,433 psi | 85% | 2959 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,883 psi | 88% | 3025 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2940 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,174 psi | 90% | 3094 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3002 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 54,621 psi | 86% | 2884 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,883 psi | 88% | 3025 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 57,319 psi | 90% | 2927 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,370 psi | 76% | 2881 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 82% | 54,781 psi | 86% | 2900 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,985 psi | 88% | 2976 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,361 psi | 87% | 2936 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 56,333 psi | 88% | 2966 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,158 psi | 86% | 2949 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,245 psi | 87% | 2907 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,819 psi | 75% | 2982 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,536 psi | 89% | 3018 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1831 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,419 psi | 87% | 2874 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,042 psi | 86% | 2907 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,448 psi | 87% | 2900 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,491 psi | 85% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,711 psi | 90% | 2956 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3064 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 55,912 psi | 88% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,840 psi | 88% | 2900 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,203 psi | 90% | 2943 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 2844 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,695 psi | 89% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,767 psi | 87% | 2959 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 55,651 psi | 87% | 3051 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 56,289 psi | 88% | 2963 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,711 psi | 90% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,259 psi | 85% | 3018 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 54,984 psi | 86% | 2963 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,533 psi | 82% | 2956 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,534 psi | 85% | 2884 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,622 psi | 87% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,099 psi | 85% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,086 psi | 88% | 3031 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2982 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,696 psi | 90% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,694 psi | 86% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,391 psi | 88% | 2943 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 57,363 psi | 90% | 3002 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 57,319 psi | 90% | 2927 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,840 psi | 88% | 2900 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,912 psi | 88% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,203 psi | 90% | 2943 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,362 psi | 88% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,172 psi | 86% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,071 psi | 86% | 2848 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,913 psi | 89% | 3002 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 54,621 psi | 86% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,520 psi | 85% | 2877 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 56,217 psi | 88% | 2966 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,346 psi | 85% | 2923 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 55,811 psi | 87% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,723 psi | 86% | 2904 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2956 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 56,536 psi | 89% | 2848 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,551 psi | 90% | 2963 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,419 psi | 87% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,651 psi | 87% | 3041 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 2949 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,259 psi | 85% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,217 psi | 88% | 2979 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,418 psi | 85% | 2917 fps | 98.4% |
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% | 53,171 psi | 83% | 2825 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 32,619 psi | 51% | 2480 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 53,156 psi | 83% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,205 psi | 65% | 2694 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 50,850 psi | 80% | 2959 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,632 psi | 78% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,192 psi | 66% | 2733 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 46,021 psi | 72% | 2838 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 36,463 psi | 57% | 2671 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,482 psi | 67% | 2736 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,430 psi | 79% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,838 psi | 84% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,653 psi | 62% | 2703 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,353 psi | 71% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,061 psi | 66% | 2726 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,900 psi | 63% | 2723 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,327 psi | 46% | 2457 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,154 psi | 49% | 2523 fps | 95% |
| Alliant Reloder-26 | 69 gr | 80% | 31,546 psi | 49% | 2572 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 42,061 psi | 66% | 2769 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,184 psi | 80% | 2831 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 39,900 psi | 63% | 2723 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,614 psi | 70% | 2703 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 96% | 42,293 psi | 66% | 2753 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,358 psi | 80% | 2844 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,873 psi | 67% | 2740 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,759 psi | 72% | 2762 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,269 psi | 77% | 2848 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,254 psi | 76% | 2828 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,318 psi | 58% | 2592 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,363 psi | 62% | 2782 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,872 psi | 66% | 2753 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 43% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,185 psi | 82% | 2825 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,118 psi | 63% | 2631 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,977 psi | 72% | 2733 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,450 psi | 62% | 2644 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,805 psi | 75% | 2785 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 47,007 psi | 74% | 2871 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 52,475 psi | 82% | 2818 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,584 psi | 68% | 2684 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,843 psi | 66% | 2667 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 33,881 psi | 53% | 2516 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 53,200 psi | 83% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,583 psi | 67% | 2717 fps | 95.6% |
| Norma MRP | 70.3 gr | 84% | 36,390 psi | 57% | 2667 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,683 psi | 64% | 2687 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 53,925 psi | 85% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,918 psi | 69% | 2822 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,508 psi | 62% | 2674 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 39,102 psi | 61% | 2694 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 44% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,995 psi | 80% | 2825 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,124 psi | 75% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,901 psi | 64% | 2710 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,523 psi | 62% | 2723 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,230 psi | 57% | 2697 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 54,360 psi | 85% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,211 psi | 76% | 2776 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,644 psi | 73% | 2772 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 41,278 psi | 65% | 2713 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,614 psi | 70% | 2703 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,584 psi | 68% | 2684 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,475 psi | 82% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,843 psi | 66% | 2667 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,429 psi | 77% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,878 psi | 77% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,598 psi | 67% | 2628 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,901 psi | 64% | 2707 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,254 psi | 76% | 2772 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,776 psi | 75% | 2762 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,246 psi | 58% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,695 psi | 57% | 2579 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 46,151 psi | 72% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,119 psi | 66% | 2684 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,653 psi | 61% | 2618 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,156 psi | 83% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,539 psi | 65% | 2687 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,663 psi | 51% | 2533 fps | 97.6% |
| Vihtavuori N560 | 77 gr | 92% | 48,399 psi | 76% | 2910 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 47,718 psi | 75% | 2884 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,162 psi | 65% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,062 psi | 67% | 2743 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,991 psi | 41% | 2434 fps | 96.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,176 psi | 65% | 2677 fps | 95.4% |
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 85 powders for .300 Weath. Mag. loaded with the .308 | 175gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,094 fps. ADI AR 2225 gives the best case fill at 100 %, and 85 of the 85 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 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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 | 175gr | Prvi Partizan FMJ BT 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.