Load Specifications
Load data in caliber .300 Weath. Mag. with .310 | 200gr | Rhino Solid Shank bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,172 psi | 86% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,405 psi | 88% | 2779 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,435 psi | 90% | 2900 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,377 psi | 90% | 2736 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,319 psi | 90% | 2838 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 54,969 psi | 86% | 2841 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 2743 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,859 psi | 69% | 2703 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,508 psi | 90% | 2838 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,363 psi | 90% | 2831 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,810 psi | 86% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,782 psi | 89% | 2828 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,955 psi | 86% | 2838 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,144 psi | 88% | 2812 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,230 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,608 psi | 89% | 2900 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,521 psi | 89% | 2802 fps | 96.6% |
| Bofors RP15 | <<locked>> | 98% | 57,522 psi | 90% | 2877 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2812 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 54,955 psi | 86% | 2838 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 55,288 psi | 87% | 2730 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2831 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 54,505 psi | 85% | 2779 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 57,188 psi | 90% | 2792 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 54,781 psi | 86% | 2782 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,537 psi | 90% | 2822 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,624 psi | 90% | 2756 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,810 psi | 86% | 2818 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 58% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,884 psi | 89% | 2769 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,579 psi | 89% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,811 psi | 89% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,057 psi | 88% | 2769 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 56,507 psi | 89% | 2877 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 57,450 psi | 90% | 2749 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,521 psi | 87% | 2746 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 86% | 54,157 psi | 85% | 2766 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 39,581 psi | 62% | 2638 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 54,795 psi | 86% | 2858 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,911 psi | 86% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,246 psi | 90% | 2900 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 57,450 psi | 90% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,506 psi | 87% | 2835 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,391 psi | 88% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,621 psi | 86% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,806 psi | 78% | 2825 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 56,579 psi | 89% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,766 psi | 86% | 2753 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 56,217 psi | 88% | 2818 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,288 psi | 87% | 2730 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,450 psi | 90% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,521 psi | 87% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,478 psi | 89% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,608 psi | 89% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,782 psi | 87% | 2812 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 56,246 psi | 88% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,347 psi | 88% | 2749 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 55,376 psi | 87% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,797 psi | 89% | 2789 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,435 psi | 90% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,579 psi | 89% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,318 psi | 88% | 2772 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,709 psi | 87% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,824 psi | 86% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,650 psi | 86% | 2854 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 54,331 psi | 85% | 2835 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 2828 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,115 psi | 88% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,679 psi | 86% | 2782 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,780 psi | 84% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,666 psi | 89% | 2785 fps | 99.6% |
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% | 34,432 psi | 54% | 2379 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 46,093 psi | 72% | 2621 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 43,439 psi | 68% | 2654 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 54,085 psi | 85% | 2690 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,508 psi | 60% | 2503 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 39,262 psi | 62% | 2546 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 40,234 psi | 63% | 2566 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 31,763 psi | 50% | 2411 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,798 psi | 61% | 2503 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,237 psi | 69% | 2628 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,053 psi | 80% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,435 psi | 60% | 2497 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,811 psi | 58% | 2500 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,040 psi | 52% | 2405 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,848 psi | 45% | 2320 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,056 psi | 56% | 2539 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 50,125 psi | 79% | 2694 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 36,492 psi | 57% | 2490 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 39,247 psi | 62% | 2582 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,811 psi | 58% | 2500 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 48,892 psi | 77% | 2625 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,667 psi | 61% | 2533 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 47,703 psi | 75% | 2667 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,212 psi | 79% | 2680 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,887 psi | 66% | 2552 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 41,176 psi | 65% | 2539 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,655 psi | 65% | 2513 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,142 psi | 54% | 2507 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 47,239 psi | 74% | 2694 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 44% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,251 psi | 69% | 2559 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,154 psi | 79% | 2648 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,888 psi | 69% | 2569 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,944 psi | 64% | 2500 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 40,263 psi | 63% | 2579 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,645 psi | 75% | 2598 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,963 psi | 72% | 2589 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,805 psi | 47% | 2264 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 44,193 psi | 69% | 2595 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 32,401 psi | 51% | 2457 fps | 95.2% |
| Norma MRP | 66.9 gr | 80% | 35,839 psi | 56% | 2503 fps | 97% |
| Norma URP | <<locked>> | 80% | 45,165 psi | 71% | 2608 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,958 psi | 63% | 2589 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 43,990 psi | 69% | 2605 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,286 psi | 52% | 2415 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 1575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,035 psi | 72% | 2641 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,150 psi | 69% | 2657 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,272 psi | 52% | 2484 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,830 psi | 67% | 2690 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 53,055 psi | 83% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,798 psi | 62% | 2480 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,927 psi | 59% | 2484 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,892 psi | 77% | 2625 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,645 psi | 75% | 2598 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,963 psi | 72% | 2589 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,171 psi | 83% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,731 psi | 73% | 2552 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,608 psi | 59% | 2480 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 52,794 psi | 83% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,178 psi | 68% | 2526 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 42,293 psi | 66% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,348 psi | 60% | 2467 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,531 psi | 79% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,586 psi | 73% | 2602 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,199 psi | 52% | 2346 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,948 psi | 72% | 2605 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,173 psi | 58% | 2480 fps | 99.7% |
| Vihtavuori N560 | 70.3 gr | 84% | 41,481 psi | 65% | 2615 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 41,466 psi | 65% | 2602 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 44,237 psi | 69% | 2703 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,614 psi | 71% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,921 psi | 75% | 2674 fps | 99.5% |
| Winchester StaBALL HD | 66.2 gr | 80% | 29,327 psi | 46% | 2421 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,027 psi | 55% | 2392 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 75 powders for .300 Weath. Mag. loaded with the .310 | 200gr | Rhino Solid Shank. ReloadSwiss RS 76 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,940 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 0.31" calls for a 1:13.0 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 Weath. Mag. with the .310 | 200gr | Rhino Solid Shank 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.