Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 139gr | Hasler ARIETE bullet and 85 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 ReloadSwiss RS 70.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 53,867 psi | 88% | 2986 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 52,156 psi | 86% | 3031 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 52,910 psi | 87% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,867 psi | 88% | 3084 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,389 psi | 89% | 3179 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 53,374 psi | 88% | 3009 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 51,576 psi | 85% | 3071 fps | 98% |
| ADI AR 2213 | <<locked>> | 98% | 52,939 psi | 87% | 3127 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,837 psi | 85% | 3071 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,837 psi | 85% | 3071 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,983 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,172 psi | 89% | 3051 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,897 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,562 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,694 psi | 90% | 3123 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,054 psi | 85% | 3123 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,562 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,658 psi | 75% | 3031 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,562 psi | 86% | 3192 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,010 psi | 84% | 3100 fps | 98% |
| Bofors RP3 | <<locked>> | 84% | 54,737 psi | 90% | 3045 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,054 psi | 85% | 3123 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 54,186 psi | 89% | 3035 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,056 psi | 90% | 3061 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,591 psi | 86% | 3081 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 52,402 psi | 86% | 3038 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 52,953 psi | 87% | 3064 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,938 psi | 85% | 3048 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,677 psi | 85% | 3009 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,570 psi | 73% | 3068 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 52,939 psi | 87% | 3120 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 60% | 1926 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,591 psi | 86% | 2986 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,042 psi | 90% | 3022 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 52,083 psi | 86% | 3015 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,475 psi | 86% | 3005 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 54,563 psi | 90% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,607 psi | 90% | 3058 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,954 psi | 89% | 3156 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 52,910 psi | 87% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,547 psi | 86% | 3002 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,780 psi | 88% | 3045 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,151 psi | 76% | 2930 fps | 99% |
| Norma 203B | <<locked>> | 82% | 53,505 psi | 88% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,765 psi | 87% | 3064 fps | 98% |
| Norma MRP | <<locked>> | 96% | 51,692 psi | 85% | 3150 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 52,750 psi | 87% | 3068 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,360 psi | 89% | 3064 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,447 psi | 89% | 3176 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 51,866 psi | 85% | 3071 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,762 psi | 80% | 3041 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 61% | 1969 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,085 psi | 90% | 3048 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,880 psi | 85% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,041 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,605 psi | 86% | 3136 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,657 psi | 73% | 3061 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 54,737 psi | 90% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,853 psi | 90% | 3041 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,388 psi | 88% | 3045 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 53,925 psi | 89% | 3107 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,186 psi | 89% | 3035 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,547 psi | 86% | 3002 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 52,910 psi | 87% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,780 psi | 88% | 3045 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,156 psi | 87% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,431 psi | 86% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,170 psi | 86% | 2949 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,461 psi | 88% | 3100 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 54,911 psi | 90% | 3038 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,940 psi | 90% | 3035 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 52,402 psi | 86% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,404 psi | 89% | 3077 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 55,042 psi | 90% | 2946 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,678 psi | 86% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,882 psi | 90% | 3061 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,722 psi | 88% | 3051 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 53,505 psi | 88% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,056 psi | 89% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,882 psi | 90% | 3133 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,982 psi | 85% | 3136 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,781 psi | 90% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,866 psi | 87% | 3084 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,225 psi | 79% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,665 psi | 90% | 3074 fps | 98.4% |
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 2700 | <<locked>> | 80% | 50,212 psi | 82% | 2923 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 31,807 psi | 52% | 2608 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 49,443 psi | 81% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,855 psi | 62% | 2776 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 50,720 psi | 83% | 3117 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,007 psi | 77% | 2897 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,235 psi | 69% | 2884 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,151 psi | 76% | 2995 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,337 psi | 70% | 2884 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,337 psi | 70% | 2884 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,456 psi | 78% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,749 psi | 83% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,086 psi | 61% | 2795 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,192 psi | 69% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,872 psi | 69% | 2877 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,523 psi | 65% | 2867 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,890 psi | 44% | 2523 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,822 psi | 54% | 2717 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 30,922 psi | 51% | 2703 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 41,698 psi | 68% | 2917 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 47,761 psi | 78% | 2933 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,523 psi | 65% | 2867 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,974 psi | 69% | 2799 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 48,196 psi | 79% | 2946 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,147 psi | 66% | 2835 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 42,989 psi | 71% | 2854 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 49,429 psi | 81% | 3002 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,472 psi | 80% | 2986 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,476 psi | 57% | 2677 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,986 psi | 64% | 2927 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,030 psi | 64% | 2841 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 44% | 1719 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,429 psi | 81% | 2933 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,576 psi | 85% | 2963 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 37,623 psi | 62% | 2720 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,410 psi | 71% | 2831 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 36,361 psi | 60% | 2726 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,167 psi | 79% | 2940 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 47,181 psi | 77% | 3031 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 49,516 psi | 81% | 2927 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,828 psi | 67% | 2776 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,015 psi | 64% | 2756 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 32,996 psi | 54% | 2641 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 50,067 psi | 82% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,772 psi | 70% | 2874 fps | 95.7% |
| Norma MRP | 62 gr | 86% | 35,969 psi | 59% | 2808 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 37,768 psi | 62% | 2776 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 50,676 psi | 83% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,671 psi | 72% | 2966 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 36,680 psi | 60% | 2759 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 38,870 psi | 64% | 2835 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 45% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,167 psi | 79% | 2930 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,889 psi | 74% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,913 psi | 62% | 2799 fps | 98.4% |
| ReloadSwiss RS 70 | 58.9 gr | 80% | 36,680 psi | 60% | 2805 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,853 psi | 59% | 2835 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,227 psi | 84% | 2940 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,918 psi | 74% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,688 psi | 77% | 2923 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,002 psi | 67% | 2858 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,974 psi | 69% | 2799 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,828 psi | 67% | 2776 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 49,516 psi | 81% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,015 psi | 64% | 2756 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,311 psi | 76% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,267 psi | 76% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,900 psi | 66% | 2717 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,640 psi | 67% | 2851 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 45,237 psi | 74% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,080 psi | 79% | 2913 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,185 psi | 56% | 2726 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,827 psi | 64% | 2779 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 51,692 psi | 85% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,236 psi | 71% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,189 psi | 64% | 2776 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,290 psi | 63% | 2756 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,183 psi | 82% | 2907 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,624 psi | 63% | 2772 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 29,675 psi | 49% | 2602 fps | 96.5% |
| Vihtavuori N560 | 67.8 gr | 94% | 48,327 psi | 79% | 3068 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,377 psi | 63% | 2740 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,147 psi | 66% | 2835 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,280 psi | 42% | 2549 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,959 psi | 67% | 2818 fps | 95.3% |
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 85 powders for 7 mm Blaser Mag. loaded with the .284 | 139gr | Hasler ARIETE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,192 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 85 of the 85 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 139.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, ReloadSwiss RS 70 rank at the top here: for 7 mm Blaser Mag. with the .284 | 139gr | Hasler ARIETE 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.