Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 158gr | Sellier & Bellot XRG 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 Vihtavuori N560.
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% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,013 psi | 90% | 2920 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,011 psi | 85% | 2976 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 90% | 52,243 psi | 86% | 2920 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 94% | 53,316 psi | 88% | 2976 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,906 psi | 79% | 2874 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,540 psi | 70% | 2831 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,272 psi | 86% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,171 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 51,837 psi | 85% | 2910 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 53,287 psi | 87% | 2976 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,563 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,824 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,810 psi | 90% | 3041 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 52,475 psi | 86% | 2959 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,647 psi | 82% | 2943 fps | 98.5% |
| Bofors RP5 | <<locked>> | 94% | 53,287 psi | 87% | 2976 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 54,056 psi | 89% | 2867 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,663 psi | 86% | 2963 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 53,011 psi | 87% | 2917 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 52,330 psi | 86% | 2874 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 92% | 53,345 psi | 88% | 2917 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 52,344 psi | 86% | 2897 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,692 psi | 87% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,576 psi | 86% | 3077 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 53,200 psi | 87% | 2953 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 61% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,228 psi | 86% | 2854 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,170 psi | 86% | 2838 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 51,909 psi | 85% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,781 psi | 90% | 2904 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 54,868 psi | 90% | 3015 fps | 98.9% |
| Lovex S065 | <<locked>> | 84% | 52,750 psi | 87% | 2835 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,114 psi | 89% | 2884 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,881 psi | 87% | 2907 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 38,203 psi | 63% | 2759 fps | 97.7% |
| Norma MRP | <<locked>> | 92% | 53,011 psi | 87% | 2995 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 53,403 psi | 88% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 51,663 psi | 85% | 2972 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 86% | 52,402 psi | 86% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 53,925 psi | 89% | 2969 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 62% | 1870 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,969 psi | 90% | 2943 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,055 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,243 psi | 87% | 3077 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,066 psi | 79% | 2953 fps | 96.9% |
| Rottweil R 904 | <<locked>> | 90% | 53,461 psi | 88% | 2890 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 92% | 54,679 psi | 90% | 2953 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 54,056 psi | 89% | 2867 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,750 psi | 87% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,114 psi | 89% | 2884 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 51,851 psi | 85% | 2789 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,244 psi | 89% | 2949 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 54,897 psi | 90% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,882 psi | 90% | 2881 fps | 98.2% |
| Somchem S365 | <<locked>> | 88% | 53,809 psi | 88% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 51,808 psi | 85% | 2871 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 52,794 psi | 87% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 51,851 psi | 85% | 2841 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,650 psi | 90% | 2904 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 54,433 psi | 89% | 2900 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 53,200 psi | 87% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,924 psi | 87% | 2992 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 52,707 psi | 87% | 2969 fps | 98.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 49,385 psi | 81% | 2963 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,723 psi | 90% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,287 psi | 87% | 2923 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 51,503 psi | 85% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,071 psi | 90% | 2920 fps | 99.4% |
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 3100 | <<locked>> | 80% | 33,431 psi | 55% | 2500 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 44,904 psi | 74% | 2756 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 45,136 psi | 74% | 2848 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 37,492 psi | 62% | 2628 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 40,930 psi | 67% | 2736 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 94% | 39,218 psi | 64% | 2690 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 30,980 psi | 51% | 2530 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,946 psi | 71% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,487 psi | 81% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,507 psi | 62% | 2625 fps | 96% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,592 psi | 58% | 2618 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,111 psi | 53% | 2530 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,036 psi | 46% | 2431 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,896 psi | 57% | 2664 fps | 99% |
| Bofors RP15 | <<locked>> | 84% | 35,360 psi | 58% | 2612 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 37,840 psi | 62% | 2707 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 35,592 psi | 58% | 2618 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 47,616 psi | 78% | 2756 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 37,492 psi | 62% | 2654 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 46,398 psi | 76% | 2802 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 49,124 psi | 81% | 2818 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 43,526 psi | 71% | 2736 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 42,917 psi | 70% | 2723 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,480 psi | 66% | 2641 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,360 psi | 58% | 2690 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 45,934 psi | 75% | 2828 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 46% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,236 psi | 71% | 2690 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,023 psi | 80% | 2782 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 42,670 psi | 70% | 2700 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,598 psi | 70% | 2680 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 39,291 psi | 65% | 2710 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,717 psi | 77% | 2736 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 45,005 psi | 74% | 2723 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 28,761 psi | 47% | 2375 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 43,033 psi | 71% | 2726 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 33,446 psi | 55% | 2635 fps | 95.8% |
| Norma MRP | 58.7 gr | 80% | 34,722 psi | 57% | 2628 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 44,121 psi | 72% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 38,856 psi | 64% | 2713 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,844 psi | 70% | 2736 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 34,534 psi | 57% | 2589 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,802 psi | 74% | 2776 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,830 psi | 70% | 2789 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,271 psi | 53% | 2602 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,628 psi | 73% | 2884 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 38,899 psi | 64% | 2608 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 36,651 psi | 60% | 2605 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 47,616 psi | 78% | 2756 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,717 psi | 77% | 2736 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 45,005 psi | 74% | 2723 fps | 99.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,600 psi | 75% | 2680 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,332 psi | 60% | 2598 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 51,793 psi | 85% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,119 psi | 69% | 2651 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,002 psi | 67% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,362 psi | 61% | 2592 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 49,530 psi | 81% | 2736 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,513 psi | 75% | 2736 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 34,548 psi | 57% | 2520 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 44,846 psi | 74% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,027 psi | 59% | 2605 fps | 99.5% |
| Vihtavuori N560 | 61.7 gr | 84% | 40,306 psi | 66% | 2743 fps | 95% |
| Vihtavuori N565 | <<locked>> | 90% | 40,118 psi | 66% | 2726 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 98% | 45,977 psi | 75% | 2894 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,585 psi | 73% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,601 psi | 77% | 2805 fps | 99.3% |
| Winchester StaBALL HD | 58.1 gr | 80% | 28,442 psi | 47% | 2539 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,463 psi | 60% | 2569 fps | 95.6% |
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 | 158gr | Sellier & Bellot XRG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,077 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 158.0 gr projectile in 0.284" calls for a 1:10.5 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, Vihtavuori N560 rank at the top here: for 7 mm Blaser Mag. with the .284 | 158gr | Sellier & Bellot XRG 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.