Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 140gr | Impala RNFP KO bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP 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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 53,505 psi | 88% | 3028 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 54,868 psi | 90% | 3071 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,868 psi | 90% | 3169 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 92% | 54,563 psi | 90% | 3107 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 94% | 52,620 psi | 86% | 3107 fps | 97.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,239 psi | 78% | 2986 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,453 psi | 70% | 2953 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,013 psi | 90% | 3107 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,708 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 52,214 psi | 86% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,404 psi | 89% | 3097 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 52,562 psi | 86% | 3110 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 53,592 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,591 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,461 psi | 88% | 3182 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,940 psi | 90% | 3150 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,878 psi | 80% | 3071 fps | 97.3% |
| Bofors RP5 | <<locked>> | 94% | 52,562 psi | 86% | 3110 fps | 98.6% |
| Bofors RP7 | <<locked>> | 84% | 53,882 psi | 88% | 3009 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,837 psi | 85% | 3081 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 52,373 psi | 86% | 3054 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 84% | 54,955 psi | 90% | 3064 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 92% | 52,504 psi | 86% | 3041 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,100 psi | 90% | 3087 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,040 psi | 85% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,634 psi | 85% | 3202 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 84% | 52,228 psi | 86% | 3087 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,766 psi | 90% | 3041 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,955 psi | 90% | 3028 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 54,839 psi | 90% | 3058 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,809 psi | 88% | 3028 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 96% | 53,940 psi | 89% | 3143 fps | 97.7% |
| Lovex S065 | <<locked>> | 84% | 52,721 psi | 87% | 2982 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 53,954 psi | 89% | 3025 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,447 psi | 89% | 3045 fps | 99.9% |
| Norma 204 | <<locked>> | 86% | 52,025 psi | 85% | 3035 fps | 98.1% |
| Norma 217ᴾ | <<locked>> | 100% | 38,319 psi | 63% | 2884 fps | 96.3% |
| Norma MRP | <<locked>> | 92% | 52,257 psi | 86% | 3136 fps | 99.4% |
| Norma URP | <<locked>> | 86% | 52,881 psi | 87% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,462 psi | 89% | 3159 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 88% | 55,071 psi | 90% | 3100 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 52,736 psi | 87% | 3094 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 63% | 1985 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,534 psi | 90% | 3091 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 52,170 psi | 86% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,330 psi | 86% | 3202 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 90% | 52,910 psi | 87% | 3022 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 92% | 53,940 psi | 89% | 3087 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 84% | 53,882 psi | 88% | 3009 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,721 psi | 87% | 2982 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 53,954 psi | 89% | 3025 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,926 psi | 90% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,071 psi | 90% | 2979 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 53,490 psi | 88% | 3084 fps | 98.7% |
| Somchem S355 | <<locked>> | 82% | 54,926 psi | 90% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,491 psi | 89% | 3009 fps | 97% |
| Somchem S365 | <<locked>> | 88% | 52,997 psi | 87% | 3054 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,766 psi | 90% | 3061 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 82% | 52,504 psi | 86% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,607 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,012 psi | 89% | 3038 fps | 99% |
| Vihtavuori N550 | <<locked>> | 86% | 53,925 psi | 89% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 52,982 psi | 87% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,127 psi | 86% | 3120 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 98% | 52,199 psi | 86% | 3104 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,853 psi | 88% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 52,649 psi | 86% | 3061 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,795 psi | 88% | 3232 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,404 psi | 89% | 3051 fps | 98.6% |
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>> | 80% | 34,490 psi | 57% | 2644 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 45,252 psi | 74% | 2900 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 47,805 psi | 78% | 3038 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 82% | 39,943 psi | 66% | 2812 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 46,267 psi | 76% | 2979 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 44,396 psi | 73% | 2927 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 35,520 psi | 58% | 2769 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,234 psi | 66% | 2812 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,627 psi | 70% | 2897 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,791 psi | 80% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,885 psi | 65% | 2808 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,756 psi | 67% | 2871 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,663 psi | 54% | 2667 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,545 psi | 50% | 2621 fps | 95.2% |
| Alliant Reloder-26 | 61.5 gr | 80% | 35,288 psi | 58% | 2802 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 40,451 psi | 66% | 2861 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 43,207 psi | 71% | 2956 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 40,756 psi | 67% | 2871 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 47,834 psi | 79% | 2897 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 42,801 psi | 70% | 2894 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,238 psi | 76% | 2936 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 48,573 psi | 80% | 2949 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 46,180 psi | 76% | 2920 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,428 psi | 80% | 2966 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,683 psi | 67% | 2785 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 37,927 psi | 62% | 2877 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,266 psi | 74% | 2956 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 46% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,076 psi | 71% | 2818 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,617 psi | 80% | 2917 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 42,902 psi | 70% | 2841 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,136 psi | 74% | 2864 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 44,585 psi | 73% | 2956 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 46,920 psi | 77% | 2874 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 45,266 psi | 74% | 2864 fps | 98.5% |
| Lovex S071 | <<locked>> | 82% | 32,010 psi | 53% | 2575 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 42,931 psi | 70% | 2854 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 36,114 psi | 59% | 2825 fps | 95.4% |
| Norma MRP | 59.7 gr | 80% | 35,128 psi | 58% | 2759 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 44,063 psi | 72% | 2884 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 44,367 psi | 73% | 2963 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 42,772 psi | 70% | 2871 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 37,376 psi | 61% | 2776 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 47% | 1778 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,846 psi | 74% | 2917 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,598 psi | 70% | 2923 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,056 psi | 58% | 2792 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 84% | 43,961 psi | 72% | 2844 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 39,407 psi | 65% | 2795 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 47,834 psi | 79% | 2897 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,920 psi | 77% | 2874 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 45,266 psi | 74% | 2864 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,677 psi | 85% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,832 psi | 75% | 2815 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,044 psi | 64% | 2789 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 51,764 psi | 85% | 2963 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,892 psi | 79% | 2890 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 40,944 psi | 67% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,782 psi | 62% | 2723 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 49,458 psi | 81% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,310 psi | 74% | 2874 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 84% | 37,159 psi | 61% | 2703 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 44,991 psi | 74% | 2881 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 36,637 psi | 60% | 2749 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 45,716 psi | 75% | 2995 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 45,977 psi | 75% | 2982 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,222 psi | 73% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,427 psi | 76% | 2943 fps | 98.6% |
| Winchester StaBALL HD | 59.1 gr | 80% | 29,356 psi | 48% | 2680 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,247 psi | 64% | 2759 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 70 powders for 7 mm Blaser Mag. loaded with the .284 | 140gr | Impala RNFP KO. Winchester StaBALL HD delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,232 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Winchester StaBALL HD, Norma MRP, Alliant Reloder-26 rank at the top here: for 7 mm Blaser Mag. with the .284 | 140gr | Impala RNFP KO 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.