Load Specifications
Load data in caliber .300 Weath. Mag. with .307 | 200gr | Frontier PH HPBT bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 56,594 psi | 89% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,650 psi | 86% | 2749 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,984 psi | 86% | 2858 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,898 psi | 88% | 2710 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,187 psi | 86% | 2802 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 56,550 psi | 89% | 2861 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,384 psi | 74% | 2703 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,018 psi | 66% | 2664 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,130 psi | 90% | 2730 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,303 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,550 psi | 89% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,723 psi | 86% | 2792 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,333 psi | 88% | 2854 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,464 psi | 90% | 2825 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,824 psi | 84% | 2861 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 54,839 psi | 86% | 2766 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 55,259 psi | 87% | 2838 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 2769 fps | 98.3% |
| Bofors RP5 | <<locked>> | 96% | 56,333 psi | 88% | 2854 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 57,072 psi | 89% | 2749 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 2789 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 56,260 psi | 88% | 2802 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,419 psi | 87% | 2759 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 56,550 psi | 89% | 2799 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,361 psi | 87% | 2782 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,738 psi | 87% | 2726 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2894 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 56,623 psi | 89% | 2838 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,999 psi | 58% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,013 psi | 86% | 2733 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,085 psi | 86% | 2720 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 54,955 psi | 86% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,186 psi | 85% | 2733 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 54,259 psi | 85% | 2835 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 55,651 psi | 87% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,334 psi | 90% | 2766 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2733 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,869 psi | 88% | 2785 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2589 fps | 97.3% |
| Norma MRP | <<locked>> | 94% | 56,188 psi | 88% | 2877 fps | 100% |
| Norma URP | <<locked>> | 88% | 56,666 psi | 89% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,955 psi | 86% | 2858 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 55,317 psi | 87% | 2789 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,145 psi | 90% | 2851 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1749 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,130 psi | 88% | 2802 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,346 psi | 85% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,362 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2894 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,340 psi | 74% | 2776 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 54,969 psi | 86% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,565 psi | 89% | 2772 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 54,288 psi | 85% | 2779 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 57,072 psi | 89% | 2749 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,651 psi | 87% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,334 psi | 90% | 2766 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,231 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,940 psi | 86% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,955 psi | 86% | 2674 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,377 psi | 90% | 2828 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 54,723 psi | 86% | 2694 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,462 psi | 85% | 2713 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 56,927 psi | 89% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,781 psi | 86% | 2756 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 55,811 psi | 87% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,969 psi | 86% | 2726 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,172 psi | 85% | 2733 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 57,609 psi | 90% | 2779 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,173 psi | 88% | 2802 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,101 psi | 88% | 2874 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 2851 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,617 psi | 76% | 2782 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,114 psi | 85% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,478 psi | 89% | 2805 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,708 psi | 86% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,534 psi | 85% | 2749 fps | 99.3% |
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 3100 | <<locked>> | 80% | 33,112 psi | 52% | 2346 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 44,483 psi | 70% | 2589 fps | 100% |
| Accurate MAGPRO | 72.5 gr | 88% | 44,628 psi | 70% | 2677 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 52,562 psi | 82% | 2657 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,231 psi | 58% | 2467 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 40,509 psi | 63% | 2569 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 41,466 psi | 65% | 2585 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 92% | 32,590 psi | 51% | 2431 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,722 psi | 84% | 2684 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,699 psi | 67% | 2595 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,052 psi | 77% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,144 psi | 58% | 2464 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,215 psi | 55% | 2461 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,865 psi | 50% | 2379 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,818 psi | 44% | 2283 fps | 95.1% |
| Alliant Reloder-26 | 66.7 gr | 80% | 34,563 psi | 54% | 2503 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,663 psi | 81% | 2710 fps | 95.1% |
| Bofors RP15 | <<locked>> | 86% | 37,420 psi | 59% | 2507 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 37,434 psi | 59% | 2543 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 35,215 psi | 55% | 2461 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,500 psi | 74% | 2595 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 39,755 psi | 62% | 2552 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 46,122 psi | 72% | 2635 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 48,791 psi | 76% | 2651 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 43,207 psi | 68% | 2575 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,467 psi | 67% | 2559 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,292 psi | 63% | 2487 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,128 psi | 55% | 2530 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 45,353 psi | 71% | 2657 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,946 psi | 67% | 2530 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,820 psi | 77% | 2618 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 42,395 psi | 66% | 2539 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,148 psi | 66% | 2516 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 41,568 psi | 65% | 2605 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 46,412 psi | 73% | 2572 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 44,585 psi | 70% | 2559 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 28,543 psi | 45% | 2231 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 42,670 psi | 67% | 2559 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 33,069 psi | 52% | 2477 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 34,418 psi | 54% | 2467 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 43,671 psi | 68% | 2575 fps | 99.9% |
| Ramshot Grand | 69 gr | 86% | 38,508 psi | 60% | 2549 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 42,467 psi | 67% | 2572 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 34,171 psi | 54% | 2431 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1565 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,083 psi | 82% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,411 psi | 70% | 2612 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,467 psi | 67% | 2621 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,908 psi | 50% | 2441 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 43,932 psi | 69% | 2710 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 51,445 psi | 81% | 2648 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,220 psi | 65% | 2507 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 36,405 psi | 57% | 2448 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 47,500 psi | 74% | 2595 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,412 psi | 73% | 2572 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 44,585 psi | 70% | 2559 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,678 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,619 psi | 81% | 2533 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,281 psi | 71% | 2520 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,085 psi | 57% | 2441 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,459 psi | 81% | 2644 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,858 psi | 66% | 2493 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 40,669 psi | 64% | 2536 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,072 psi | 58% | 2434 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 49,066 psi | 77% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,107 psi | 71% | 2572 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,301 psi | 54% | 2369 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 44,425 psi | 70% | 2575 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,679 psi | 56% | 2448 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 42,569 psi | 67% | 2635 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 42,424 psi | 66% | 2621 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 45,397 psi | 71% | 2720 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,034 psi | 69% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,296 psi | 73% | 2638 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,152 psi | 44% | 2382 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,129 psi | 57% | 2415 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 77 powders for .300 Weath. Mag. loaded with the .307 | 200gr | Frontier PH HPBT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,904 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.307" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .307 | 200gr | Frontier PH HPBT 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.