Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 133gr | MRR Green Hunting bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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% | 54,143 psi | 89% | 3048 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 52,634 psi | 86% | 3094 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 53,592 psi | 88% | 3038 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,534 psi | 90% | 3150 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,925 psi | 89% | 3248 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 98% | 54,853 psi | 90% | 3245 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 53,664 psi | 88% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,054 psi | 85% | 3136 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 98% | 53,258 psi | 87% | 3189 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,083 psi | 86% | 3130 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,375 psi | 89% | 3094 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,592 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 51,880 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,910 psi | 87% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,839 psi | 90% | 3182 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,446 psi | 86% | 3186 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,953 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,122 psi | 76% | 3097 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,156 psi | 87% | 3261 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,401 psi | 84% | 3163 fps | 97.7% |
| Bofors RP3 | <<locked>> | 82% | 51,779 psi | 85% | 3058 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,446 psi | 86% | 3186 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 54,737 psi | 90% | 3100 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 51,967 psi | 85% | 3071 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,997 psi | 87% | 3146 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 86% | 52,794 psi | 87% | 3104 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 96% | 53,316 psi | 88% | 3127 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,141 psi | 86% | 3077 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,005 psi | 74% | 3127 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 53,055 psi | 87% | 3179 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 60% | 1972 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,997 psi | 87% | 3051 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,431 psi | 86% | 3077 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,939 psi | 87% | 3071 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 55,027 psi | 90% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,027 psi | 90% | 3120 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,230 psi | 89% | 3219 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 53,272 psi | 87% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,156 psi | 87% | 3068 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,360 psi | 89% | 3110 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,804 psi | 77% | 2992 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 53,954 psi | 89% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,026 psi | 87% | 3127 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 52,054 psi | 85% | 3212 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 53,185 psi | 87% | 3133 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,592 psi | 90% | 3127 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,926 psi | 90% | 3241 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 52,170 psi | 86% | 3133 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,008 psi | 80% | 3100 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 61% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 51,967 psi | 85% | 3054 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,272 psi | 86% | 3169 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,404 psi | 89% | 3173 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,779 psi | 87% | 3199 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,223 psi | 74% | 3123 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 55,114 psi | 90% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 51,837 psi | 85% | 3051 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,664 psi | 88% | 3104 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 54,099 psi | 89% | 3169 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,737 psi | 90% | 3100 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,156 psi | 87% | 3068 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,272 psi | 87% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,360 psi | 89% | 3110 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,374 psi | 88% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,895 psi | 87% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,489 psi | 86% | 3012 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,635 psi | 88% | 3163 fps | 98.2% |
| Somchem S355 | <<locked>> | 84% | 51,982 psi | 85% | 3051 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 52,808 psi | 87% | 3140 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,969 psi | 90% | 3143 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 53,069 psi | 87% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 51,764 psi | 85% | 3071 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,085 psi | 89% | 3110 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 53,911 psi | 89% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,491 psi | 89% | 3133 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 51,967 psi | 85% | 3143 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,272 psi | 86% | 3196 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,868 psi | 90% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,272 psi | 87% | 3150 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,385 psi | 79% | 3238 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,984 psi | 90% | 3133 fps | 98.2% |
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% | 50,633 psi | 83% | 2989 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,925 psi | 57% | 2733 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,270 psi | 83% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,667 psi | 63% | 2848 fps | 98.5% |
| Accurate High Country | <<locked>> | 92% | 46,659 psi | 77% | 3110 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 96% | 51,082 psi | 84% | 3176 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 47,253 psi | 78% | 2959 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,699 psi | 70% | 2946 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 49,835 psi | 82% | 3123 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,801 psi | 70% | 2946 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,066 psi | 79% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,227 psi | 84% | 3061 fps | 100% |
| Alliant Reloder-16 | 54.8 gr | 80% | 37,405 psi | 61% | 2854 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,583 psi | 70% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,322 psi | 69% | 2936 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,757 psi | 70% | 2992 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,470 psi | 45% | 2585 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,417 psi | 55% | 2779 fps | 95.7% |
| Alliant Reloder-26 | 62 gr | 82% | 31,662 psi | 52% | 2772 fps | 95.8% |
| Bofors RP15 | <<locked>> | 94% | 42,163 psi | 69% | 2976 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,472 psi | 80% | 3002 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,757 psi | 70% | 2992 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,395 psi | 70% | 2858 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,704 psi | 80% | 3012 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,437 psi | 66% | 2890 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,424 psi | 71% | 2917 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 49,908 psi | 82% | 3064 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,940 psi | 57% | 2740 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,163 psi | 69% | 3058 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,566 psi | 65% | 2904 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 45% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,705 psi | 82% | 2995 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,130 psi | 63% | 2779 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,859 psi | 72% | 2894 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 37,014 psi | 61% | 2792 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,515 psi | 80% | 2999 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 47,427 psi | 78% | 3087 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 49,951 psi | 82% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 68% | 2838 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,711 psi | 65% | 2822 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 33,910 psi | 56% | 2710 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 50,589 psi | 83% | 3048 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,076 psi | 71% | 2933 fps | 95.3% |
| Norma MRP | 63.1 gr | 86% | 36,550 psi | 60% | 2871 fps | 95% |
| Norma URP | <<locked>> | 80% | 38,377 psi | 63% | 2841 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,966 psi | 84% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,514 psi | 78% | 3100 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,159 psi | 61% | 2822 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 39,407 psi | 65% | 2894 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 45% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,588 psi | 80% | 2992 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,237 psi | 74% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,479 psi | 63% | 2864 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,101 psi | 61% | 2867 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,247 psi | 64% | 2976 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,953 psi | 85% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,687 psi | 75% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,094 psi | 77% | 2982 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,379 psi | 68% | 2917 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,395 psi | 70% | 2858 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 68% | 2838 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,951 psi | 82% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,711 psi | 65% | 2822 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,717 psi | 77% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,615 psi | 77% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,538 psi | 67% | 2779 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,988 psi | 67% | 2910 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 45,701 psi | 75% | 2940 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 34,824 psi | 57% | 2792 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,508 psi | 65% | 2841 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 43,830 psi | 72% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,755 psi | 65% | 2838 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 41,495 psi | 68% | 2874 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 50,662 psi | 83% | 2972 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,204 psi | 64% | 2838 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 30,501 psi | 50% | 2671 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 94% | 48,733 psi | 80% | 3130 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,957 psi | 64% | 2805 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,611 psi | 67% | 2897 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,063 psi | 43% | 2621 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,626 psi | 68% | 2884 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 81 powders for 7 mm Blaser Mag. loaded with the .284 | 133gr | MRR Green Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,261 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 81 of the 81 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 133.0 gr projectile in 0.284" calls for a 1:12.0 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. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for 7 mm Blaser Mag. with the .284 | 133gr | MRR Green Hunting 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.