Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Barnes XLC S bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, ReloadSwiss RS 76 and Hodgdon Retumbo.
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>> | 92% | 55,811 psi | 87% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,898 psi | 89% | 2871 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,391 psi | 88% | 2982 fps | 99% |
| Accurate MAGPRO | <<locked>> | 92% | 57,203 psi | 90% | 2986 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 90% | 56,492 psi | 89% | 2917 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 54,389 psi | 85% | 2923 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 2884 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,210 psi | 74% | 2851 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,710 psi | 89% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,086 psi | 88% | 2907 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,868 psi | 86% | 2923 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,043 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,143 psi | 86% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,449 psi | 88% | 2986 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,709 psi | 87% | 2877 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 57,464 psi | 90% | 2966 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 2959 fps | 99.1% |
| Bofors RP5 | <<locked>> | 92% | 54,868 psi | 86% | 2923 fps | 99.4% |
| Bofors RP7 | <<locked>> | 82% | 54,911 psi | 86% | 2812 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2966 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 57,522 psi | 90% | 2913 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,347 psi | 88% | 2871 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 90% | 54,143 psi | 85% | 2858 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,840 psi | 89% | 2900 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,305 psi | 90% | 2841 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3084 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,099 psi | 85% | 2894 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,217 psi | 88% | 2848 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,695 psi | 87% | 2825 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 56,739 psi | 89% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,303 psi | 87% | 2844 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 94% | 56,043 psi | 88% | 2963 fps | 98.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,105 psi | 68% | 2766 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 57,101 psi | 89% | 2831 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,303 psi | 87% | 2828 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 56,826 psi | 89% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,101 psi | 89% | 2904 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 43,439 psi | 68% | 2795 fps | 98.7% |
| Norma MRP | <<locked>> | 90% | 54,578 psi | 86% | 2943 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 54,621 psi | 86% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,768 psi | 89% | 2979 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 56,884 psi | 89% | 2907 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,259 psi | 87% | 2917 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 1841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,289 psi | 88% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,201 psi | 85% | 2913 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,665 psi | 86% | 3022 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 2979 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 90% | 57,566 psi | 90% | 2884 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 55,811 psi | 87% | 2897 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 54,911 psi | 86% | 2812 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,101 psi | 89% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,303 psi | 87% | 2828 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,115 psi | 88% | 2785 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,376 psi | 87% | 2894 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 55,695 psi | 87% | 2825 fps | 98.1% |
| Somchem S365 | <<locked>> | 86% | 55,347 psi | 87% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,594 psi | 89% | 2874 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 56,985 psi | 89% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,318 psi | 88% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,956 psi | 88% | 2854 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 55,695 psi | 87% | 2844 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,448 psi | 87% | 2881 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,201 psi | 85% | 2936 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 96% | 54,897 psi | 86% | 2930 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2979 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,245 psi | 87% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,157 psi | 85% | 2861 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,027 psi | 85% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,231 psi | 88% | 2867 fps | 99.4% |
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 3100 | <<locked>> | 80% | 38,348 psi | 60% | 2533 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 49,980 psi | 78% | 2766 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,654 psi | 64% | 2687 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 84% | 43,801 psi | 69% | 2740 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 41,220 psi | 65% | 2638 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 42,090 psi | 66% | 2687 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 40,698 psi | 64% | 2651 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 88% | 32,996 psi | 52% | 2513 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,934 psi | 74% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,307 psi | 65% | 2635 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,434 psi | 59% | 2585 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,318 psi | 57% | 2552 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,821 psi | 50% | 2470 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,784 psi | 62% | 2697 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,504 psi | 82% | 2822 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 37,289 psi | 58% | 2579 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 40,089 psi | 63% | 2677 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,434 psi | 59% | 2585 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 51,735 psi | 81% | 2756 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 39,044 psi | 61% | 2615 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 50,778 psi | 80% | 2805 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,852 psi | 83% | 2812 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 82% | 42,090 psi | 66% | 2635 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,990 psi | 69% | 2674 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,889 psi | 70% | 2651 fps | 100% |
| Hodgdon Retumbo | 60.1 gr | 84% | 35,114 psi | 55% | 2605 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 50,372 psi | 79% | 2831 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,282 psi | 44% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,876 psi | 73% | 2690 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,460 psi | 82% | 2772 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 47,152 psi | 74% | 2707 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,511 psi | 68% | 2628 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 40,654 psi | 64% | 2667 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,524 psi | 64% | 2707 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,792 psi | 80% | 2733 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,211 psi | 77% | 2726 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 33,504 psi | 53% | 2418 fps | 97% |
| Norma 204 | <<locked>> | 80% | 47,137 psi | 74% | 2733 fps | 98% |
| Norma 217 | <<locked>> | 92% | 34,040 psi | 53% | 2569 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,233 psi | 61% | 2654 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 48,370 psi | 76% | 2746 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,408 psi | 63% | 2674 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 47,123 psi | 74% | 2743 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,287 psi | 54% | 2507 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 46% | 1650 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,429 psi | 77% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,181 psi | 74% | 2795 fps | 100% |
| ReloadSwiss RS 76 | 62.8 gr | 82% | 32,256 psi | 51% | 2520 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,569 psi | 68% | 2782 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 42,525 psi | 67% | 2615 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 40,944 psi | 64% | 2625 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 51,735 psi | 81% | 2756 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,792 psi | 80% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,211 psi | 77% | 2726 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,588 psi | 78% | 2680 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,596 psi | 64% | 2618 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 43,337 psi | 68% | 2605 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 45,658 psi | 72% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,640 psi | 65% | 2608 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,664 psi | 84% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,632 psi | 78% | 2736 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,274 psi | 57% | 2487 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 49,269 psi | 77% | 2746 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,843 psi | 64% | 2631 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 41,843 psi | 66% | 2700 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 42,482 psi | 67% | 2700 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 96% | 47,863 psi | 75% | 2854 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,414 psi | 76% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,981 psi | 80% | 2808 fps | 99.7% |
| Winchester StaBALL HD | 58.8 gr | 80% | 32,764 psi | 51% | 2592 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,043 psi | 60% | 2533 fps | 95.8% |
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 71 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | Barnes XLC S. Hodgdon Retumbo delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,084 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, ReloadSwiss RS 76, Hodgdon Retumbo rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Barnes XLC S 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.