Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Winchester Silvertip bullet and 70 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 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.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 55,869 psi | 88% | 2874 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,971 psi | 89% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,694 psi | 86% | 2972 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 57,638 psi | 90% | 2963 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 55,608 psi | 87% | 2969 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2933 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2894 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,215 psi | 85% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,174 psi | 90% | 2953 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,825 psi | 87% | 2966 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,319 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,753 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,824 psi | 84% | 2966 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,869 psi | 89% | 2930 fps | 97% |
| Bofors RP15 | <<locked>> | 94% | 55,013 psi | 86% | 2949 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3005 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 55,825 psi | 87% | 2966 fps | 99.7% |
| Bofors RP7 | <<locked>> | 82% | 55,085 psi | 86% | 2848 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 55,288 psi | 87% | 2963 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 82% | 54,708 psi | 86% | 2900 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,203 psi | 90% | 2913 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 55,288 psi | 87% | 2907 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,360 psi | 85% | 2890 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,534 psi | 85% | 2828 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,637 psi | 87% | 3074 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,143 psi | 86% | 2936 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1827 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,971 psi | 89% | 2887 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,420 psi | 88% | 2867 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,174 psi | 90% | 2890 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,086 psi | 88% | 2887 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 57,522 psi | 90% | 3012 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,642 psi | 68% | 2795 fps | 97.1% |
| Lovex S065 | <<locked>> | 84% | 57,305 psi | 90% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,593 psi | 87% | 2864 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,305 psi | 90% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,317 psi | 85% | 2887 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 43,961 psi | 69% | 2822 fps | 99% |
| Norma MRP | <<locked>> | 90% | 55,796 psi | 87% | 2986 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,216 psi | 87% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,476 psi | 85% | 2972 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 84% | 54,085 psi | 85% | 2887 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,000 psi | 89% | 2963 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,058 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,390 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,666 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 3028 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 88% | 54,998 psi | 86% | 2874 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 56,913 psi | 89% | 2943 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 55,085 psi | 86% | 2848 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,305 psi | 90% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,593 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,289 psi | 88% | 2822 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,478 psi | 89% | 2936 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 56,550 psi | 89% | 2871 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 56,101 psi | 88% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,421 psi | 90% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,377 psi | 90% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,855 psi | 89% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,000 psi | 89% | 2897 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 56,086 psi | 88% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,927 psi | 88% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,477 psi | 87% | 2982 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 96% | 55,666 psi | 87% | 2966 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3025 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,333 psi | 88% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,926 psi | 86% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,912 psi | 88% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,348 psi | 90% | 2913 fps | 99.7% |
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% | 37,347 psi | 59% | 2539 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 49,661 psi | 78% | 2789 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,280 psi | 69% | 2772 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 41,350 psi | 65% | 2667 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 39,595 psi | 62% | 2657 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 90% | 38,377 psi | 60% | 2628 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 32,372 psi | 51% | 2523 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,485 psi | 74% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,321 psi | 65% | 2661 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,275 psi | 58% | 2605 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,998 psi | 56% | 2566 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,169 psi | 49% | 2477 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,798 psi | 62% | 2713 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,314 psi | 79% | 2815 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 37,144 psi | 58% | 2598 fps | 95.8% |
| Bofors RP30 | <<locked>> | 88% | 37,695 psi | 59% | 2641 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,275 psi | 58% | 2605 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 51,735 psi | 81% | 2789 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 86% | 36,579 psi | 57% | 2589 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,140 psi | 80% | 2841 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 53,548 psi | 84% | 2854 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 42,264 psi | 66% | 2667 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,524 psi | 65% | 2651 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,788 psi | 70% | 2674 fps | 100% |
| Hodgdon Retumbo | 64.8 gr | 84% | 34,853 psi | 55% | 2625 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,227 psi | 80% | 2871 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,137 psi | 74% | 2726 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,055 psi | 83% | 2812 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,050 psi | 74% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,973 psi | 64% | 2605 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 84% | 40,872 psi | 64% | 2697 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,159 psi | 60% | 2674 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,676 psi | 79% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,095 psi | 77% | 2756 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 32,227 psi | 51% | 2418 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 47,384 psi | 74% | 2766 fps | 98.4% |
| Norma 217 | <<locked>> | 92% | 33,562 psi | 53% | 2579 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 39,175 psi | 61% | 2674 fps | 98% |
| Norma URP | <<locked>> | 80% | 48,573 psi | 76% | 2776 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,913 psi | 59% | 2644 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 47,326 psi | 74% | 2772 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 33,895 psi | 53% | 2520 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,821 psi | 78% | 2812 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,863 psi | 75% | 2831 fps | 100% |
| ReloadSwiss RS 76 | 67.7 gr | 82% | 31,662 psi | 50% | 2530 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,324 psi | 69% | 2818 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 42,627 psi | 67% | 2648 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,872 psi | 64% | 2651 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,735 psi | 81% | 2789 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,676 psi | 79% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,095 psi | 77% | 2756 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,647 psi | 78% | 2713 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,538 psi | 64% | 2644 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 43,265 psi | 68% | 2635 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 45,818 psi | 72% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,336 psi | 65% | 2631 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,896 psi | 84% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,864 psi | 78% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,853 psi | 56% | 2503 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,313 psi | 77% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,248 psi | 63% | 2641 fps | 99.9% |
| Vihtavuori N560 | 65.6 gr | 82% | 42,047 psi | 66% | 2726 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 86% | 39,624 psi | 62% | 2657 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 45,629 psi | 72% | 2831 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,081 psi | 77% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,329 psi | 80% | 2841 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,489 psi | 51% | 2592 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,768 psi | 59% | 2552 fps | 96.1% |
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 76 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | Winchester Silvertip. Hodgdon Retumbo delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,074 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 (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:16.0 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, Vihtavuori N560 rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | Winchester Silvertip 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.