Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 190gr | Winchester Silvertip bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Ramshot Grand, Accurate MAGPRO 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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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 3100 | <<locked>> | 94% | 56,768 psi | 89% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,404 psi | 85% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,477 psi | 87% | 2946 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 55,114 psi | 86% | 2887 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 94% | 56,579 psi | 89% | 2946 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 2844 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,353 psi | 71% | 2805 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,376 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,333 psi | 88% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,621 psi | 86% | 2874 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,695 psi | 89% | 2943 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,360 psi | 85% | 2861 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,636 psi | 86% | 2946 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,578 psi | 86% | 2848 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 55,651 psi | 87% | 2923 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 2920 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 56,695 psi | 89% | 2943 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 56,405 psi | 88% | 2828 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2936 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 55,825 psi | 87% | 2881 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,810 psi | 86% | 2838 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,478 psi | 89% | 2887 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,390 psi | 87% | 2871 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,434 psi | 87% | 2808 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,173 psi | 88% | 3048 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,434 psi | 88% | 2920 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1791 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,708 psi | 86% | 2815 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,404 psi | 85% | 2799 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 54,694 psi | 86% | 2822 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,363 psi | 90% | 2867 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 54,534 psi | 85% | 2927 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 55,158 psi | 86% | 2799 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,884 psi | 89% | 2848 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,389 psi | 85% | 2818 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,622 psi | 87% | 2871 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 41,162 psi | 65% | 2733 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 56,521 psi | 89% | 2963 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,405 psi | 88% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,172 psi | 86% | 2946 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 55,259 psi | 87% | 2871 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 57,740 psi | 90% | 2940 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 60% | 1837 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,346 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,478 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 2930 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 90% | 56,159 psi | 88% | 2854 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 90% | 54,143 psi | 85% | 2864 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 56,405 psi | 88% | 2828 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,158 psi | 86% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,884 psi | 89% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,377 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,230 psi | 85% | 2753 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,406 psi | 90% | 2917 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 57,435 psi | 90% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,740 psi | 90% | 2848 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 57,014 psi | 89% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,621 psi | 86% | 2835 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 55,187 psi | 86% | 2743 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,578 psi | 86% | 2805 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,215 psi | 85% | 2818 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,334 psi | 90% | 2864 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,623 psi | 89% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,260 psi | 88% | 2956 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 56,231 psi | 88% | 2940 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,939 psi | 83% | 2936 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,667 psi | 90% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,043 psi | 88% | 2884 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,115 psi | 88% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,476 psi | 85% | 2831 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% | 35,578 psi | 56% | 2470 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 47,572 psi | 75% | 2720 fps | 100% |
| Accurate MAGPRO | 78.2 gr | 86% | 44,831 psi | 70% | 2753 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 39,508 psi | 62% | 2592 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 40,408 psi | 63% | 2641 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 41,626 psi | 65% | 2667 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 90% | 32,764 psi | 51% | 2500 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,469 psi | 71% | 2726 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,518 psi | 82% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,624 psi | 62% | 2589 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,840 psi | 59% | 2585 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,142 psi | 54% | 2493 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,660 psi | 46% | 2402 fps | 96% |
| Alliant Reloder-26 | 73.6 gr | 80% | 37,463 psi | 59% | 2635 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,343 psi | 80% | 2792 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 37,681 psi | 59% | 2582 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 37,913 psi | 59% | 2618 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 37,840 psi | 59% | 2585 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 49,864 psi | 78% | 2720 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 39,827 psi | 62% | 2628 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 48,936 psi | 77% | 2766 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 51,474 psi | 81% | 2782 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 43,047 psi | 67% | 2648 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,366 psi | 66% | 2631 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,815 psi | 67% | 2608 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,259 psi | 55% | 2602 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 48,733 psi | 76% | 2792 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 44% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,310 psi | 71% | 2654 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,111 psi | 80% | 2743 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 45,034 psi | 71% | 2664 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,930 psi | 66% | 2589 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 41,539 psi | 65% | 2680 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 48,849 psi | 77% | 2697 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,108 psi | 74% | 2687 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,574 psi | 48% | 2346 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 45,411 psi | 71% | 2690 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 33,591 psi | 53% | 2549 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 37,014 psi | 58% | 2595 fps | 97% |
| Norma URP | <<locked>> | 80% | 46,412 psi | 73% | 2703 fps | 100% |
| Ramshot Grand | 76.1 gr | 86% | 41,263 psi | 65% | 2687 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 45,281 psi | 71% | 2703 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,432 psi | 54% | 2507 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 45% | 1640 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,311 psi | 74% | 2740 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,498 psi | 71% | 2756 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,432 psi | 54% | 2579 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,585 psi | 70% | 2795 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 40,872 psi | 64% | 2575 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,856 psi | 61% | 2572 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 49,864 psi | 78% | 2720 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,849 psi | 77% | 2697 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,108 psi | 74% | 2687 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,056 psi | 85% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,732 psi | 75% | 2644 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,522 psi | 60% | 2569 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 54,143 psi | 85% | 2769 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,324 psi | 69% | 2621 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,584 psi | 68% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,465 psi | 62% | 2559 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 51,793 psi | 81% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,935 psi | 75% | 2703 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,272 psi | 54% | 2434 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,108 psi | 74% | 2700 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,247 psi | 60% | 2569 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 42,757 psi | 67% | 2710 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 42,946 psi | 67% | 2700 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 46,064 psi | 72% | 2808 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,992 psi | 74% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,139 psi | 77% | 2769 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,371 psi | 48% | 2513 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,013 psi | 56% | 2480 fps | 95.1% |
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 72 powders for .300 Weath. Mag. loaded with the .311 | 190gr | Winchester Silvertip. Hodgdon Retumbo delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,048 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 190.0 gr projectile in 0.311" calls for a 1:6.0 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. Ramshot Grand, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .311 | 190gr | Winchester Silvertip 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.