Load Specifications
Load data in caliber .300 Weath. Mag. with .311 | 180gr | Sierra Pro-Hunter bullet and 76 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,492 psi | 87% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,072 psi | 89% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,711 psi | 90% | 3045 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 54,955 psi | 86% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,143 psi | 85% | 2930 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 55,361 psi | 87% | 2986 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,209 psi | 72% | 2808 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,133 psi | 64% | 2766 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,970 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,128 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,259 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,145 psi | 90% | 2976 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,085 psi | 86% | 2982 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,057 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,808 psi | 81% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,652 psi | 89% | 3051 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,667 psi | 90% | 3022 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 57,188 psi | 90% | 2887 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2884 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 55,085 psi | 86% | 2982 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 56,014 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2904 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 57,188 psi | 90% | 2907 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,114 psi | 86% | 2933 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,259 psi | 85% | 2887 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 55,521 psi | 87% | 2927 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,244 psi | 85% | 2907 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,418 psi | 85% | 2861 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,792 psi | 80% | 3015 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 55,332 psi | 87% | 2966 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 58% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,493 psi | 90% | 2917 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,595 psi | 90% | 2904 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 57,159 psi | 90% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,666 psi | 89% | 2910 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 56,710 psi | 89% | 3018 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 54,650 psi | 86% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,202 psi | 88% | 2897 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2858 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,723 psi | 86% | 2917 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 54,984 psi | 86% | 3005 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,419 psi | 87% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,638 psi | 90% | 3045 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 54,143 psi | 85% | 2917 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,796 psi | 87% | 2976 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,739 psi | 89% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,578 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,884 psi | 89% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,201 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 3012 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,261 psi | 90% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,477 psi | 87% | 2900 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,594 psi | 89% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,014 psi | 88% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,650 psi | 86% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,202 psi | 88% | 2897 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,085 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,305 psi | 90% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,450 psi | 90% | 2854 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,130 psi | 88% | 2956 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 57,014 psi | 89% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,116 psi | 90% | 2894 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 55,477 psi | 87% | 2920 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,072 psi | 89% | 2933 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 54,636 psi | 86% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,348 psi | 90% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,594 psi | 89% | 2913 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 56,362 psi | 88% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,926 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,911 psi | 86% | 2995 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2969 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,898 psi | 89% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,114 psi | 86% | 2933 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,348 psi | 90% | 2933 fps | 99.1% |
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% | 32,242 psi | 51% | 2444 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 43,410 psi | 68% | 2707 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 46,775 psi | 73% | 2851 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 51,634 psi | 81% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,870 psi | 61% | 2631 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 45,223 psi | 71% | 2795 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 43,308 psi | 68% | 2749 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,172 psi | 57% | 2641 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,620 psi | 82% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,684 psi | 65% | 2717 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,892 psi | 75% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,696 psi | 61% | 2625 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,378 psi | 62% | 2680 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,995 psi | 49% | 2474 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,792 psi | 48% | 2487 fps | 95.5% |
| Alliant Reloder-26 | 70.7 gr | 80% | 33,489 psi | 52% | 2598 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 39,030 psi | 61% | 2671 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 53,432 psi | 84% | 2831 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,800 psi | 66% | 2762 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 39,378 psi | 62% | 2680 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 46,514 psi | 73% | 2713 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 41,640 psi | 65% | 2717 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 53,490 psi | 84% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,063 psi | 71% | 2753 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 47,747 psi | 75% | 2772 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 45,194 psi | 71% | 2743 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,413 psi | 74% | 2785 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,189 psi | 61% | 2598 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,044 psi | 61% | 2753 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,266 psi | 69% | 2772 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,901 psi | 66% | 2641 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,819 psi | 75% | 2740 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 41,452 psi | 65% | 2657 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,007 psi | 74% | 2743 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 43,323 psi | 68% | 2769 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 45,484 psi | 71% | 2690 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,758 psi | 69% | 2677 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 31,575 psi | 49% | 2425 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,727 psi | 65% | 2674 fps | 95.9% |
| Norma MRP | 70.4 gr | 82% | 35,969 psi | 56% | 2628 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 42,728 psi | 67% | 2697 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,221 psi | 68% | 2782 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 41,437 psi | 65% | 2687 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 90% | 38,479 psi | 60% | 2654 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,185 psi | 83% | 2835 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,792 psi | 80% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,178 psi | 68% | 2726 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,553 psi | 65% | 2740 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,737 psi | 56% | 2661 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 50,430 psi | 79% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,917 psi | 67% | 2671 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 37,971 psi | 60% | 2608 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 46,514 psi | 73% | 2713 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,484 psi | 71% | 2690 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,758 psi | 69% | 2677 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,590 psi | 81% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,720 psi | 79% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,353 psi | 70% | 2638 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,364 psi | 63% | 2664 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,386 psi | 79% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,746 psi | 73% | 2717 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 39,436 psi | 62% | 2651 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,129 psi | 57% | 2539 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,182 psi | 76% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,121 psi | 69% | 2694 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,087 psi | 60% | 2575 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 43,482 psi | 68% | 2694 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 34,664 psi | 54% | 2549 fps | 98.6% |
| Vihtavuori N560 | 75.5 gr | 88% | 44,556 psi | 70% | 2805 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 44,353 psi | 70% | 2785 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,120 psi | 68% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,266 psi | 71% | 2756 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,412 psi | 43% | 2467 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,422 psi | 63% | 2635 fps | 95.7% |
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 82 powders for .300 Weath. Mag. loaded with the .311 | 180gr | Sierra Pro-Hunter. Winchester StaBALL HD delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,094 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 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 180.0 gr projectile in 0.311" calls for a 1:14.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .311 | 180gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 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.