Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 140gr | Nosler Partition 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, Alliant Reloder-26 and Accurate MAGPRO.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 52,910 psi | 87% | 3038 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 54,433 psi | 89% | 3084 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,157 psi | 89% | 3189 fps | 98% |
| Accurate MAGPRO | <<locked>> | 96% | 54,969 psi | 90% | 3186 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 52,982 psi | 87% | 2999 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 51,924 psi | 85% | 3074 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 96% | 52,982 psi | 87% | 3127 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,378 psi | 65% | 2894 fps | 97.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,025 psi | 85% | 3068 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,099 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,793 psi | 85% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,707 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,984 psi | 90% | 3123 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,562 psi | 86% | 3127 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,519 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,501 psi | 81% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,606 psi | 88% | 3199 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 51,793 psi | 85% | 3107 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 55,027 psi | 90% | 3038 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,455 psi | 75% | 3022 fps | 96.5% |
| Bofors RP5 | <<locked>> | 96% | 52,562 psi | 86% | 3127 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 54,244 psi | 89% | 3028 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,950 psi | 80% | 3041 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 55,071 psi | 90% | 3058 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,779 psi | 87% | 3077 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 84% | 52,272 psi | 86% | 3035 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 94% | 53,084 psi | 87% | 3064 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,098 psi | 86% | 3051 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,257 psi | 86% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,501 psi | 80% | 3153 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 52,852 psi | 87% | 3110 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 60% | 1936 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,083 psi | 86% | 3009 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,199 psi | 86% | 2995 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 55,027 psi | 90% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,636 psi | 90% | 3058 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,259 psi | 89% | 3163 fps | 97.8% |
| Lovex S065 | <<locked>> | 86% | 52,794 psi | 87% | 3002 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,201 psi | 89% | 3045 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,473 psi | 83% | 2995 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 52,634 psi | 86% | 3061 fps | 98.3% |
| Norma MRP | <<locked>> | 94% | 52,272 psi | 86% | 3150 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 53,272 psi | 87% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,013 psi | 90% | 3186 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 88% | 52,011 psi | 85% | 3068 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,243 psi | 87% | 3117 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 62% | 1985 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,853 psi | 90% | 3041 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,069 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,563 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,837 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 3146 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 55,100 psi | 90% | 3035 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,374 psi | 88% | 3045 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 54,114 psi | 89% | 3104 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 54,244 psi | 89% | 3028 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,794 psi | 87% | 3002 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,201 psi | 89% | 3045 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,171 psi | 87% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,112 psi | 86% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,953 psi | 85% | 2943 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,650 psi | 88% | 3100 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 55,042 psi | 90% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,882 psi | 90% | 3031 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 52,881 psi | 87% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,853 psi | 90% | 3081 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 52,692 psi | 87% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,940 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,186 psi | 89% | 3054 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 54,201 psi | 89% | 3064 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,330 psi | 86% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,373 psi | 86% | 3140 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,793 psi | 85% | 3110 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,752 psi | 90% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,040 psi | 87% | 3084 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,824 psi | 88% | 3245 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,926 psi | 90% | 3074 fps | 98.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 32,764 psi | 54% | 2621 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 41,437 psi | 68% | 2844 fps | 99.4% |
| Accurate High Country | <<locked>> | 88% | 43,830 psi | 72% | 2986 fps | 95.5% |
| Accurate MAGPRO | 70.3 gr | 92% | 47,790 psi | 78% | 3051 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,806 psi | 82% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,697 psi | 65% | 2822 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 46,311 psi | 76% | 2995 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 34,621 psi | 57% | 2762 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,089 psi | 66% | 2825 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,821 psi | 83% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,871 psi | 65% | 2854 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,701 psi | 75% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,711 psi | 65% | 2818 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,103 psi | 66% | 2874 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,443 psi | 48% | 2595 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,430 psi | 52% | 2671 fps | 95.7% |
| Alliant Reloder-26 | 61.8 gr | 80% | 31,807 psi | 52% | 2723 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 39,769 psi | 65% | 2864 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 51,387 psi | 84% | 2982 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,337 psi | 70% | 2953 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 40,103 psi | 66% | 2874 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 44,759 psi | 73% | 2854 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 42,685 psi | 70% | 2907 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 51,474 psi | 85% | 2999 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,221 psi | 71% | 2894 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 45,934 psi | 75% | 2913 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 46,369 psi | 76% | 2940 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,588 psi | 80% | 2982 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,463 psi | 62% | 2736 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,697 psi | 65% | 2943 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 42,206 psi | 69% | 2907 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 45% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,422 psi | 66% | 2779 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,180 psi | 76% | 2884 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 39,581 psi | 65% | 2792 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,208 psi | 74% | 2881 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 44,382 psi | 73% | 2966 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 43,671 psi | 72% | 2831 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 42,076 psi | 69% | 2815 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 31,981 psi | 53% | 2602 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 40,118 psi | 66% | 2808 fps | 95.2% |
| Norma MRP | 63 gr | 84% | 36,738 psi | 60% | 2822 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 40,944 psi | 67% | 2835 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 44,208 psi | 73% | 2979 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,813 psi | 65% | 2825 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 36,782 psi | 60% | 2779 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 46% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,372 psi | 84% | 2982 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,486 psi | 80% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,176 psi | 68% | 2861 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,639 psi | 65% | 2871 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,709 psi | 60% | 2858 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 48,501 psi | 80% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,932 psi | 72% | 2864 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 38,783 psi | 64% | 2802 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 44,759 psi | 73% | 2854 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,671 psi | 72% | 2831 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 80% | 42,076 psi | 69% | 2815 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,719 psi | 82% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,139 psi | 81% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,801 psi | 70% | 2772 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,479 psi | 63% | 2795 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 48,356 psi | 79% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,196 psi | 79% | 2913 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,594 psi | 62% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,970 psi | 61% | 2726 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,412 psi | 76% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,293 psi | 69% | 2831 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 38,870 psi | 64% | 2762 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 41,684 psi | 68% | 2831 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 32,982 psi | 54% | 2680 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 45,629 psi | 75% | 3009 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 45,223 psi | 74% | 2982 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,423 psi | 68% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,424 psi | 71% | 2900 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,165 psi | 43% | 2582 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,553 psi | 68% | 2828 fps | 95.9% |
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 Blaser Mag. loaded with the .284 | 140gr | Nosler Partition. Winchester StaBALL HD delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,245 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 (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.0 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, Alliant Reloder-26, Accurate MAGPRO rank at the top here: for 7 mm Blaser Mag. with the .284 | 140gr | Nosler Partition 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.