Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Barnes BND SPIT-FIRE bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Alliant Reloder-26 and Accurate High Country.
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 2700 | <<locked>> | 82% | 56,695 psi | 89% | 2986 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 56,260 psi | 88% | 3041 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,594 psi | 89% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,056 psi | 85% | 3028 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,479 psi | 90% | 3192 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 54,665 psi | 86% | 3127 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 55,999 psi | 88% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,100 psi | 86% | 3081 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,333 psi | 88% | 3133 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 2828 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,174 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,406 psi | 90% | 3051 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,911 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,144 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,418 psi | 85% | 3064 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,767 psi | 87% | 3127 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 3041 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,406 psi | 90% | 3205 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3107 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 54,607 psi | 86% | 2989 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,767 psi | 87% | 3127 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 57,363 psi | 90% | 3035 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,457 psi | 76% | 2979 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 54,694 psi | 86% | 3005 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,130 psi | 88% | 3084 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 55,506 psi | 87% | 3041 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 56,405 psi | 88% | 3071 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,347 psi | 87% | 3054 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,376 psi | 87% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,051 psi | 75% | 3084 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 56,637 psi | 89% | 3123 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 58% | 1913 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,390 psi | 87% | 2982 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,056 psi | 86% | 3012 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,405 psi | 87% | 3005 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 54,476 psi | 85% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,360 psi | 85% | 3002 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3169 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 55,941 psi | 88% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,796 psi | 87% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,319 psi | 90% | 3048 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 2940 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 56,710 psi | 89% | 3035 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,086 psi | 88% | 3068 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 55,535 psi | 87% | 3153 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 56,391 psi | 88% | 3071 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,711 psi | 90% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,491 psi | 85% | 3123 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,288 psi | 87% | 3071 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3058 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,505 psi | 85% | 2989 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,535 psi | 87% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,969 psi | 85% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,304 psi | 88% | 3143 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,254 psi | 76% | 3081 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 54,723 psi | 86% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,550 psi | 89% | 3048 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 57,450 psi | 90% | 3110 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 57,363 psi | 90% | 3035 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,796 psi | 87% | 3005 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,941 psi | 88% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,319 psi | 90% | 3048 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,246 psi | 88% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,172 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,245 psi | 87% | 2953 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,971 psi | 89% | 3107 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 54,665 psi | 86% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,665 psi | 86% | 2979 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 56,144 psi | 88% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,563 psi | 86% | 3028 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 55,767 psi | 87% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,592 psi | 86% | 3005 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3058 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,507 psi | 89% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,609 psi | 90% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,477 psi | 87% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,608 psi | 87% | 3143 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 3048 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,201 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,130 psi | 88% | 3084 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,098 psi | 83% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,433 psi | 85% | 3018 fps | 98.3% |
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 2700 | <<locked>> | 80% | 53,026 psi | 83% | 2927 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 34,896 psi | 55% | 2628 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 53,084 psi | 83% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,075 psi | 64% | 2789 fps | 99% |
| Accurate High Country | 67.1 gr | 90% | 46,717 psi | 73% | 2992 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 50,952 psi | 80% | 3061 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,414 psi | 77% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,250 psi | 66% | 2828 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 46,035 psi | 72% | 2940 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 36,608 psi | 57% | 2762 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,430 psi | 79% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,693 psi | 84% | 2992 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,508 psi | 62% | 2795 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,339 psi | 71% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,989 psi | 66% | 2822 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,728 psi | 67% | 2881 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,312 psi | 46% | 2539 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,214 psi | 52% | 2671 fps | 95.8% |
| Alliant Reloder-26 | 61.4 gr | 80% | 31,531 psi | 49% | 2661 fps | 95.8% |
| Bofors RP15 | <<locked>> | 92% | 42,148 psi | 66% | 2864 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,981 psi | 80% | 2930 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,728 psi | 67% | 2881 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,628 psi | 70% | 2802 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 45,353 psi | 71% | 2917 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 51,343 psi | 80% | 2949 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,902 psi | 67% | 2838 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,571 psi | 71% | 2858 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 49,226 psi | 77% | 2946 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,327 psi | 76% | 2927 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,289 psi | 58% | 2687 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,465 psi | 62% | 2881 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 41,901 psi | 66% | 2851 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1706 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,011 psi | 82% | 2927 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,103 psi | 63% | 2723 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,847 psi | 72% | 2831 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 39,436 psi | 62% | 2740 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,819 psi | 75% | 2884 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 47,094 psi | 74% | 2972 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 52,547 psi | 82% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,526 psi | 68% | 2782 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 41,756 psi | 65% | 2759 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 33,910 psi | 53% | 2605 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,055 psi | 83% | 2979 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,670 psi | 67% | 2818 fps | 95.4% |
| Norma MRP | <<locked>> | 84% | 36,448 psi | 57% | 2762 fps | 95% |
| Norma URP | <<locked>> | 80% | 40,596 psi | 64% | 2782 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 53,954 psi | 85% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,239 psi | 74% | 2989 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,479 psi | 62% | 2766 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 39,059 psi | 61% | 2782 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 44% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,053 psi | 80% | 2930 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,124 psi | 75% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,017 psi | 64% | 2808 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,523 psi | 62% | 2818 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,943 psi | 61% | 2861 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 48,080 psi | 75% | 2877 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,746 psi | 73% | 2871 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 41,147 psi | 64% | 2805 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 44,628 psi | 70% | 2802 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,526 psi | 68% | 2782 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 52,547 psi | 82% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,756 psi | 65% | 2759 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,371 psi | 77% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,762 psi | 76% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,685 psi | 67% | 2726 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,785 psi | 64% | 2799 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 48,211 psi | 76% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,184 psi | 80% | 2920 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 37,217 psi | 58% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,117 psi | 61% | 2730 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 46,064 psi | 72% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,974 psi | 66% | 2779 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 38,595 psi | 60% | 2707 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 53,142 psi | 83% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,524 psi | 65% | 2782 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,634 psi | 51% | 2621 fps | 97.3% |
| Vihtavuori N560 | 68.6 gr | 92% | 48,559 psi | 76% | 3012 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 48,022 psi | 75% | 2986 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,133 psi | 64% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,091 psi | 68% | 2841 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,962 psi | 41% | 2513 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,234 psi | 65% | 2772 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 84 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Barnes BND SPIT-FIRE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,205 fps. ADI AR 2225 gives the best case fill at 100 %, and 84 of the 84 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 140.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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. Vihtavuori N560, Alliant Reloder-26, Accurate High Country rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Barnes BND SPIT-FIRE 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.