Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Nosler CT FailSafe bullet and 77 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% | 55,622 psi | 87% | 3038 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 57,087 psi | 89% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,913 psi | 89% | 3189 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 54,056 psi | 85% | 3123 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 54,795 psi | 86% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,143 psi | 85% | 3071 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,434 psi | 87% | 3130 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,350 psi | 65% | 2897 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,028 psi | 88% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,696 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,317 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,334 psi | 90% | 3123 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,201 psi | 87% | 3123 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,405 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3104 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,840 psi | 89% | 3199 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,389 psi | 85% | 3110 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 57,188 psi | 90% | 3035 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 3022 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 55,201 psi | 87% | 3123 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 56,086 psi | 88% | 3025 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,256 psi | 80% | 3048 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 57,087 psi | 89% | 3051 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,187 psi | 86% | 3077 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 54,375 psi | 85% | 3035 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,608 psi | 87% | 3068 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,346 psi | 85% | 3048 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,520 psi | 85% | 3005 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3156 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 55,564 psi | 87% | 3114 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1932 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,725 psi | 90% | 3025 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,551 psi | 90% | 3064 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,508 psi | 90% | 3051 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 57,261 psi | 90% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,782 psi | 89% | 3054 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 57,101 psi | 89% | 3169 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,650 psi | 86% | 2995 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 56,246 psi | 88% | 3045 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2995 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 54,853 psi | 86% | 3061 fps | 98.4% |
| Norma MRP | <<locked>> | 94% | 55,056 psi | 86% | 3150 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 55,521 psi | 87% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,882 psi | 84% | 3123 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 88% | 54,230 psi | 85% | 3061 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3120 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,942 psi | 89% | 3038 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,665 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,000 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,376 psi | 87% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3150 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 57,290 psi | 90% | 3031 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,521 psi | 87% | 3045 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,637 psi | 89% | 3107 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,086 psi | 88% | 3025 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,650 psi | 86% | 2995 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 56,246 psi | 88% | 3045 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,201 psi | 87% | 3038 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,363 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,508 psi | 90% | 2999 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,188 psi | 88% | 3100 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,898 psi | 89% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,363 psi | 90% | 3035 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,550 psi | 87% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,246 psi | 90% | 3077 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,679 psi | 86% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,392 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,913 psi | 89% | 3058 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 56,478 psi | 89% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,027 psi | 86% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,998 psi | 86% | 3140 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3114 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,014 psi | 89% | 3012 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,187 psi | 86% | 3077 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,406 psi | 90% | 3074 fps | 98.9% |
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% | 32,198 psi | 50% | 2562 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 43,337 psi | 68% | 2841 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 46,064 psi | 72% | 2986 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 92% | 50,270 psi | 79% | 3051 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,634 psi | 81% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,553 psi | 65% | 2825 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 45,266 psi | 71% | 2930 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 36,332 psi | 57% | 2766 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,533 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,510 psi | 65% | 2848 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,848 psi | 75% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,394 psi | 65% | 2815 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,192 psi | 66% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,893 psi | 48% | 2592 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,808 psi | 51% | 2661 fps | 95.9% |
| Alliant Reloder-26 | 64.3 gr | 80% | 33,576 psi | 53% | 2720 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 41,843 psi | 66% | 2864 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 53,577 psi | 84% | 2979 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,889 psi | 70% | 2956 fps | 95.9% |
| Bofors RP5 | <<locked>> | 88% | 42,192 psi | 66% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,427 psi | 73% | 2848 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,701 psi | 70% | 2913 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 53,534 psi | 84% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,150 psi | 71% | 2890 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 47,819 psi | 75% | 2910 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 48,602 psi | 76% | 2943 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,514 psi | 74% | 2923 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,276 psi | 62% | 2733 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,146 psi | 61% | 2881 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,382 psi | 70% | 2907 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 1732 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,317 psi | 85% | 2976 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,989 psi | 66% | 2776 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,819 psi | 75% | 2881 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 41,350 psi | 65% | 2785 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,934 psi | 74% | 2877 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 46,543 psi | 73% | 2969 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 45,368 psi | 71% | 2828 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 43,758 psi | 69% | 2812 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 33,692 psi | 53% | 2598 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 41,872 psi | 66% | 2805 fps | 95.4% |
| Norma MRP | 64 gr | 82% | 36,013 psi | 56% | 2753 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 42,757 psi | 67% | 2831 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 43,265 psi | 68% | 2913 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,582 psi | 65% | 2822 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 38,609 psi | 61% | 2779 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,094 psi | 44% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,243 psi | 83% | 2979 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,778 psi | 80% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,323 psi | 68% | 2861 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,553 psi | 65% | 2871 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,926 psi | 56% | 2785 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,415 psi | 79% | 2923 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,847 psi | 72% | 2861 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 40,625 psi | 64% | 2799 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,427 psi | 73% | 2848 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,368 psi | 71% | 2828 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 43,758 psi | 69% | 2812 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,764 psi | 81% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,792 psi | 80% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,338 psi | 69% | 2769 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,263 psi | 63% | 2792 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,241 psi | 79% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,905 psi | 74% | 2851 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,523 psi | 62% | 2785 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,667 psi | 61% | 2723 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 48,196 psi | 76% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,092 psi | 69% | 2828 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 38,174 psi | 60% | 2703 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 43,497 psi | 68% | 2828 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,563 psi | 54% | 2671 fps | 98.1% |
| Vihtavuori N560 | 70.2 gr | 90% | 47,877 psi | 75% | 3005 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 47,616 psi | 75% | 2982 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,250 psi | 68% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,150 psi | 71% | 2890 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,485 psi | 43% | 2579 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,625 psi | 64% | 2766 fps | 95.2% |
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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Nosler CT FailSafe. Winchester StaBALL HD delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,248 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Nosler CT FailSafe 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.