Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 165gr | Merlin Virtus bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, IMR 7828 SSC and Norma MRP.
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.
A valid access license is required to use the Personalized Load Calculator.
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 3100 | <<locked>> | 96% | 55,027 psi | 90% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,098 psi | 87% | 2831 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,867 psi | 88% | 2949 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 82% | 54,781 psi | 90% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,172 psi | 89% | 2890 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 51,909 psi | 85% | 2894 fps | 98.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,224 psi | 76% | 2785 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,930 psi | 67% | 2746 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,288 psi | 89% | 2887 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,360 psi | 89% | 2890 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 51,576 psi | 85% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,577 psi | 88% | 2881 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,085 psi | 90% | 2943 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 52,562 psi | 86% | 2861 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,677 psi | 85% | 2917 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,591 psi | 86% | 2946 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,969 psi | 89% | 2854 fps | 96.2% |
| Bofors RP15 | <<locked>> | 98% | 53,983 psi | 89% | 2927 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,645 psi | 78% | 2854 fps | 98.4% |
| Bofors RP5 | <<locked>> | 96% | 55,085 psi | 90% | 2943 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 52,649 psi | 86% | 2782 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2874 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 86% | 55,100 psi | 90% | 2887 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 54,302 psi | 89% | 2844 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 51,851 psi | 85% | 2831 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,476 psi | 89% | 2874 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,491 psi | 89% | 2808 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,792 psi | 83% | 2986 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 51,532 psi | 85% | 2867 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 60% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,070 psi | 89% | 2822 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,070 psi | 89% | 2805 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 53,490 psi | 88% | 2825 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,243 psi | 87% | 2822 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 53,156 psi | 87% | 2927 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 54,476 psi | 89% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,504 psi | 86% | 2799 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,286 psi | 86% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,708 psi | 90% | 2874 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 36,289 psi | 60% | 2664 fps | 97.4% |
| Norma MRP | <<locked>> | 94% | 54,853 psi | 90% | 2966 fps | 100% |
| Norma URP | <<locked>> | 86% | 51,793 psi | 85% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,766 psi | 88% | 2946 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 88% | 54,099 psi | 89% | 2874 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 51,634 psi | 85% | 2877 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 62% | 1811 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,882 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,968 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 51,314 psi | 84% | 2881 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,242 psi | 84% | 2982 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,818 psi | 75% | 2858 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 82% | 53,606 psi | 88% | 2782 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 51,982 psi | 85% | 2805 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 52,866 psi | 87% | 2864 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 52,649 psi | 86% | 2782 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,476 psi | 89% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,504 psi | 86% | 2799 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,041 psi | 89% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,809 psi | 88% | 2759 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 52,446 psi | 86% | 2861 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 53,490 psi | 88% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,287 psi | 87% | 2795 fps | 98.1% |
| Somchem S365 | <<locked>> | 88% | 51,880 psi | 85% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,461 psi | 88% | 2838 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,578 psi | 90% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,751 psi | 88% | 2812 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 52,924 psi | 87% | 2818 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 52,707 psi | 87% | 2815 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,679 psi | 90% | 2884 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,868 psi | 90% | 2963 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,143 psi | 89% | 2933 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,282 psi | 78% | 2867 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,171 psi | 87% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,100 psi | 90% | 2887 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,200 psi | 87% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,345 psi | 88% | 2835 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% | 31,647 psi | 52% | 2408 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 42,975 psi | 71% | 2664 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 43,424 psi | 71% | 2759 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,488 psi | 85% | 2743 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,100 psi | 59% | 2543 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 39,421 psi | 65% | 2648 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 37,782 psi | 62% | 2605 fps | 95% |
| ADI AR 2225 | <<locked>> | 92% | 31,531 psi | 52% | 2503 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,390 psi | 60% | 2546 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,568 psi | 68% | 2677 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,008 psi | 79% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,071 psi | 59% | 2539 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,171 psi | 56% | 2536 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,516 psi | 50% | 2441 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,643 psi | 44% | 2346 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,243 psi | 55% | 2575 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,763 psi | 83% | 2799 fps | 95.4% |
| Bofors RP15 | <<locked>> | 86% | 36,216 psi | 59% | 2582 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 36,114 psi | 59% | 2615 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 34,171 psi | 56% | 2536 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 46,253 psi | 76% | 2674 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 36,187 psi | 59% | 2569 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 44,933 psi | 74% | 2717 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 47,732 psi | 78% | 2736 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 42,206 psi | 69% | 2654 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,350 psi | 68% | 2638 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,972 psi | 64% | 2559 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 33,866 psi | 56% | 2602 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 44,295 psi | 73% | 2740 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 45% | 1581 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,814 psi | 69% | 2605 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,848 psi | 79% | 2700 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 41,191 psi | 68% | 2618 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,234 psi | 68% | 2598 fps | 95.5% |
| IMR 7828 SSC | 59.7 gr | 88% | 40,495 psi | 66% | 2684 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 45,063 psi | 74% | 2648 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 43,366 psi | 71% | 2638 fps | 99.1% |
| Lovex S071 | <<locked>> | 82% | 29,080 psi | 48% | 2343 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 41,698 psi | 68% | 2644 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 31,662 psi | 52% | 2539 fps | 95.3% |
| Norma MRP | 56.4 gr | 80% | 33,272 psi | 55% | 2539 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 42,467 psi | 70% | 2657 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 37,318 psi | 61% | 2628 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 41,408 psi | 68% | 2654 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 33,069 psi | 54% | 2507 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 46% | 1621 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,039 psi | 84% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,004 psi | 71% | 2687 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,336 psi | 68% | 2703 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 30,763 psi | 51% | 2510 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 42,612 psi | 70% | 2792 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 50,024 psi | 82% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,147 psi | 66% | 2582 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 35,273 psi | 58% | 2523 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 46,253 psi | 76% | 2674 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,063 psi | 74% | 2648 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 43,366 psi | 71% | 2638 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,720 psi | 83% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,092 psi | 72% | 2598 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,954 psi | 57% | 2516 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,024 psi | 82% | 2723 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 40,814 psi | 67% | 2572 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,276 psi | 64% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,795 psi | 59% | 2507 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,892 psi | 79% | 2651 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,932 psi | 72% | 2651 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,141 psi | 54% | 2438 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 43,294 psi | 71% | 2657 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,330 psi | 56% | 2520 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 41,495 psi | 68% | 2717 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 38,290 psi | 63% | 2638 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 44,077 psi | 72% | 2805 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,960 psi | 71% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,136 psi | 74% | 2720 fps | 99.3% |
| Winchester StaBALL HD | 55.8 gr | 80% | 26,992 psi | 44% | 2451 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 34,925 psi | 57% | 2487 fps | 95.4% |
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 76 powders for 7 mm Blaser Mag. loaded with the .284 | 165gr | Merlin Virtus. Winchester StaBALL HD delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,768 fps to 2,992 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 165.0 gr projectile in 0.284" calls for a 1:8.5 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, IMR 7828 SSC, Norma MRP rank at the top here: for 7 mm Blaser Mag. with the .284 | 165gr | Merlin Virtus 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.