Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 175gr | Speer TBBC bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 55,042 psi | 86% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,391 psi | 88% | 2759 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,710 psi | 89% | 2884 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 57,508 psi | 90% | 2887 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 57,087 psi | 89% | 2822 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 54,694 psi | 86% | 2828 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2792 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,276 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,449 psi | 88% | 2808 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,940 psi | 86% | 2825 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,434 psi | 88% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,840 psi | 88% | 2858 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,956 psi | 89% | 2881 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,956 psi | 88% | 2789 fps | 97.2% |
| Bofors RP15 | <<locked>> | 96% | 57,725 psi | 90% | 2864 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2864 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 54,940 psi | 86% | 2825 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,650 psi | 86% | 2707 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,128 psi | 85% | 2818 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 54,201 psi | 85% | 2759 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,594 psi | 89% | 2769 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 54,505 psi | 85% | 2766 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,130 psi | 90% | 2805 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,522 psi | 90% | 2736 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,621 psi | 86% | 2930 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,215 psi | 85% | 2792 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 58% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,202 psi | 88% | 2746 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,811 psi | 87% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,565 psi | 89% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,593 psi | 87% | 2749 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 56,507 psi | 89% | 2864 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,656 psi | 67% | 2664 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 56,826 psi | 89% | 2726 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,998 psi | 86% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,376 psi | 88% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,479 psi | 90% | 2805 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 2694 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 54,926 psi | 86% | 2844 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,563 psi | 86% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,377 psi | 90% | 2887 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,145 psi | 90% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,753 psi | 87% | 2822 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 1765 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,260 psi | 88% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,462 psi | 85% | 2805 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,216 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2887 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 88% | 54,404 psi | 85% | 2736 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 56,043 psi | 88% | 2799 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,650 psi | 86% | 2707 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,826 psi | 89% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,998 psi | 86% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,869 psi | 88% | 2684 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,622 psi | 87% | 2795 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 55,637 psi | 87% | 2730 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 55,216 psi | 87% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,550 psi | 89% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,768 psi | 89% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,376 psi | 88% | 2733 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,043 psi | 88% | 2753 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 55,303 psi | 87% | 2736 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,143 psi | 86% | 2769 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,679 psi | 86% | 2841 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 54,708 psi | 86% | 2825 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2884 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2877 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,637 psi | 87% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,201 psi | 85% | 2759 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,708 psi | 86% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,333 psi | 88% | 2769 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,869 psi | 58% | 2421 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 49,124 psi | 77% | 2654 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,103 psi | 63% | 2582 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 82% | 40,553 psi | 64% | 2582 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 40,843 psi | 64% | 2539 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 82% | 39,131 psi | 61% | 2536 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 90% | 37,739 psi | 59% | 2503 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 29,965 psi | 47% | 2356 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,963 psi | 74% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,886 psi | 64% | 2536 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,709 psi | 58% | 2480 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,563 psi | 56% | 2444 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,777 psi | 48% | 2365 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,262 psi | 62% | 2589 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,676 psi | 78% | 2680 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 34,272 psi | 54% | 2425 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 37,028 psi | 58% | 2520 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 36,709 psi | 58% | 2480 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 51,343 psi | 80% | 2654 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 36,114 psi | 57% | 2467 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 50,633 psi | 79% | 2703 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,924 psi | 83% | 2713 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,943 psi | 61% | 2480 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,988 psi | 64% | 2526 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,440 psi | 70% | 2546 fps | 100% |
| Hodgdon Retumbo | 58.4 gr | 82% | 32,184 psi | 50% | 2444 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,589 psi | 79% | 2736 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 44% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,644 psi | 73% | 2592 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,475 psi | 82% | 2674 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,746 psi | 73% | 2602 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,553 psi | 64% | 2480 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 82% | 37,695 psi | 59% | 2513 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,507 psi | 59% | 2552 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 50,212 psi | 79% | 2628 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,559 psi | 76% | 2621 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,792 psi | 50% | 2303 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 46,992 psi | 74% | 2635 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 30,748 psi | 48% | 2402 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,638 psi | 61% | 2552 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 47,979 psi | 75% | 2638 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,391 psi | 59% | 2523 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 46,905 psi | 74% | 2644 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 31,053 psi | 49% | 2346 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,066 psi | 77% | 2677 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,239 psi | 74% | 2697 fps | 100% |
| ReloadSwiss RS 76 | 62.5 gr | 82% | 31,183 psi | 49% | 2418 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,103 psi | 63% | 2621 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 42,119 psi | 66% | 2520 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 80% | 40,364 psi | 63% | 2523 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,343 psi | 80% | 2654 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,212 psi | 79% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,559 psi | 76% | 2621 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,008 psi | 77% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,030 psi | 63% | 2520 fps | 97.6% |
| Somchem S361 | <<locked>> | 80% | 42,830 psi | 67% | 2510 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 45,223 psi | 71% | 2595 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,785 psi | 64% | 2503 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 53,316 psi | 84% | 2621 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,371 psi | 77% | 2631 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,462 psi | 56% | 2385 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 80% | 48,834 psi | 77% | 2638 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,769 psi | 62% | 2516 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,696 psi | 61% | 2539 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 86% | 38,986 psi | 61% | 2536 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 92% | 41,669 psi | 65% | 2638 fps | 95% |
| Vihtavuori N570 | <<locked>> | 98% | 48,718 psi | 76% | 2812 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,443 psi | 76% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,865 psi | 80% | 2707 fps | 99.9% |
| Winchester StaBALL HD | 58.5 gr | 80% | 31,952 psi | 50% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,333 psi | 59% | 2434 fps | 96.7% |
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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 175gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,930 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 175.0 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 2218, ADI AR 2225 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 7 mm Weath. Mag. with the .284 | 175gr | Speer TBBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.