Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 177gr | Peregrine Glider GRM bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 52,388 psi | 86% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,012 psi | 89% | 2740 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,969 psi | 90% | 2867 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 90% | 51,561 psi | 85% | 2749 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 52,765 psi | 87% | 2808 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,021 psi | 77% | 2710 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,742 psi | 69% | 2674 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 51,735 psi | 85% | 2746 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 51,924 psi | 85% | 2749 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 52,504 psi | 86% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,549 psi | 90% | 2792 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 52,634 psi | 86% | 2805 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 53,751 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,968 psi | 87% | 2835 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,737 psi | 88% | 2861 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 55,013 psi | 90% | 2779 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 51,808 psi | 85% | 2792 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,965 psi | 80% | 2779 fps | 99% |
| Bofors RP5 | <<locked>> | 94% | 52,634 psi | 86% | 2805 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 53,432 psi | 88% | 2694 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,083 psi | 86% | 2795 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 52,620 psi | 86% | 2749 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 51,851 psi | 85% | 2707 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 52,852 psi | 87% | 2749 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,822 psi | 85% | 2733 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,141 psi | 86% | 2674 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,880 psi | 85% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 52,620 psi | 86% | 2782 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,940 psi | 90% | 2733 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,100 psi | 90% | 2720 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 54,708 psi | 90% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,070 psi | 89% | 2736 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 54,244 psi | 89% | 2844 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 37,202 psi | 61% | 2575 fps | 96% |
| Lovex S065 | <<locked>> | 84% | 51,996 psi | 85% | 2664 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 53,476 psi | 88% | 2710 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,476 psi | 88% | 2726 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,315 psi | 86% | 2736 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 37,246 psi | 61% | 2602 fps | 98.3% |
| Norma MRP | <<locked>> | 92% | 52,460 psi | 86% | 2825 fps | 100% |
| Norma URP | <<locked>> | 86% | 52,852 psi | 87% | 2726 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,853 psi | 90% | 2861 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 51,808 psi | 85% | 2736 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 52,953 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 62% | 1739 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,172 psi | 89% | 2769 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 52,576 psi | 86% | 2795 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,257 psi | 86% | 2900 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,108 psi | 77% | 2789 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 54,389 psi | 89% | 2687 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 52,953 psi | 87% | 2720 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 54,085 psi | 89% | 2782 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 53,432 psi | 88% | 2694 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 51,996 psi | 85% | 2664 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 53,476 psi | 88% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,723 psi | 90% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,781 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 53,650 psi | 88% | 2779 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 54,418 psi | 89% | 2684 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,375 psi | 89% | 2717 fps | 98.7% |
| Somchem S365 | <<locked>> | 88% | 52,939 psi | 87% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,491 psi | 89% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 51,967 psi | 85% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,607 psi | 90% | 2717 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,172 psi | 89% | 2736 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 53,896 psi | 88% | 2730 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 52,504 psi | 86% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,446 psi | 86% | 2825 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 98% | 51,793 psi | 85% | 2799 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,312 psi | 79% | 2792 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,114 psi | 89% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 52,620 psi | 86% | 2749 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,679 psi | 90% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,317 psi | 89% | 2749 fps | 99.7% |
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% | 32,387 psi | 53% | 2346 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 43,903 psi | 72% | 2585 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 41,365 psi | 68% | 2625 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 36,825 psi | 60% | 2470 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 37,536 psi | 62% | 2516 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 92% | 36,056 psi | 59% | 2480 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 30,182 psi | 50% | 2385 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,144 psi | 61% | 2474 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,540 psi | 70% | 2598 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,052 psi | 81% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,811 psi | 60% | 2467 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 32,619 psi | 54% | 2411 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,372 psi | 52% | 2379 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,209 psi | 45% | 2287 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,968 psi | 56% | 2507 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 48,501 psi | 80% | 2667 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 32,372 psi | 53% | 2402 fps | 95% |
| Bofors RP30 | <<locked>> | 90% | 34,519 psi | 57% | 2490 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 32,619 psi | 54% | 2411 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,181 psi | 77% | 2595 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 34,447 psi | 57% | 2444 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 45,934 psi | 75% | 2638 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 48,617 psi | 80% | 2651 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 40,205 psi | 66% | 2526 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 39,378 psi | 65% | 2507 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,885 psi | 65% | 2480 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 32,416 psi | 53% | 2477 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 45,310 psi | 74% | 2664 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 45% | 1516 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,540 psi | 70% | 2530 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,573 psi | 80% | 2618 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 42,032 psi | 69% | 2536 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 39,320 psi | 65% | 2470 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 36,100 psi | 59% | 2497 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 34,925 psi | 57% | 2520 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,006 psi | 76% | 2569 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 44,353 psi | 73% | 2562 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 27,833 psi | 46% | 2228 fps | 96% |
| Norma 204 | <<locked>> | 80% | 42,438 psi | 70% | 2566 fps | 98% |
| Norma 217 | <<locked>> | 94% | 30,414 psi | 50% | 2428 fps | 95.6% |
| Norma MRP | 54.4 gr | 80% | 34,011 psi | 56% | 2474 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 43,511 psi | 71% | 2579 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 35,418 psi | 58% | 2497 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 42,192 psi | 69% | 2575 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 31,473 psi | 52% | 2382 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 46% | 1552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,947 psi | 72% | 2608 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,279 psi | 69% | 2628 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 29,312 psi | 48% | 2388 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 40,538 psi | 67% | 2661 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 51,169 psi | 84% | 2644 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,319 psi | 63% | 2454 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 36,027 psi | 59% | 2451 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 47,181 psi | 77% | 2595 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,006 psi | 76% | 2569 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 44,353 psi | 73% | 2562 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,532 psi | 85% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,860 psi | 74% | 2516 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,708 psi | 59% | 2448 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 51,024 psi | 84% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 38,769 psi | 64% | 2441 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 40,190 psi | 66% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,579 psi | 60% | 2438 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 48,936 psi | 80% | 2566 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,817 psi | 74% | 2569 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 31,560 psi | 52% | 2316 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,251 psi | 73% | 2575 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 35,114 psi | 58% | 2448 fps | 99.8% |
| Vihtavuori N560 | 57.1 gr | 84% | 39,494 psi | 65% | 2582 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 88% | 36,637 psi | 60% | 2513 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 41,974 psi | 69% | 2671 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,903 psi | 72% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,934 psi | 75% | 2638 fps | 99.7% |
| Winchester StaBALL HD | 53.8 gr | 80% | 27,615 psi | 45% | 2392 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 33,301 psi | 55% | 2362 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 75 powders for 7 mm Blaser Mag. loaded with the .284 | 177gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,904 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 177.0 gr projectile in 0.284" calls for a 1:7.5 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, Vihtavuori N560, Norma MRP rank at the top here: for 7 mm Blaser Mag. with the .284 | 177gr | Peregrine Glider GRM 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.