Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 160gr | Winchester Silvertip bullet and 52 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 ADI AR 2218.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 55,956 psi | 88% | 2982 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,898 psi | 88% | 3104 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 57,058 psi | 89% | 3074 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,666 psi | 87% | 3091 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 54,505 psi | 85% | 3068 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 54,824 psi | 86% | 3189 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 53,809 psi | 84% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,623 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,173 psi | 88% | 3084 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,433 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,955 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,926 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,855 psi | 89% | 3169 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3159 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,043 psi | 88% | 3051 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 55,593 psi | 87% | 3074 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,592 psi | 86% | 3081 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,173 psi | 88% | 3084 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,115 psi | 88% | 3091 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,665 psi | 86% | 3022 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,261 psi | 90% | 3061 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,319 psi | 90% | 2969 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,172 psi | 85% | 3156 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 1955 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,462 psi | 85% | 2959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,926 psi | 86% | 2995 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 54,041 psi | 85% | 3071 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 92% | 56,956 psi | 89% | 2999 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3133 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,360 psi | 85% | 2959 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,186 psi | 85% | 3097 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,188 psi | 88% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 53,940 psi | 85% | 3071 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 55,361 psi | 87% | 3045 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 1998 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,752 psi | 86% | 3140 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,969 psi | 85% | 3104 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 57,392 psi | 90% | 3038 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,434 psi | 88% | 3051 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,023 psi | 77% | 2949 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,057 psi | 88% | 3051 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,129 psi | 86% | 2972 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 56,681 psi | 89% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,826 psi | 89% | 3009 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,869 psi | 88% | 3035 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 56,260 psi | 88% | 3015 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,564 psi | 87% | 3104 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 56,884 psi | 89% | 3100 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 54,636 psi | 86% | 3110 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 55,825 psi | 87% | 3173 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,694 psi | 86% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,696 psi | 90% | 3035 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 45,818 psi | 72% | 2815 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,194 psi | 71% | 2900 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 80% | 49,879 psi | 78% | 2949 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,136 psi | 71% | 2897 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 80% | 33,663 psi | 53% | 2628 fps | 95.7% |
| ADI AR 2218 | 90.2 gr | 92% | 44,121 psi | 69% | 2966 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 30,995 psi | 49% | 2595 fps | 97.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,690 psi | 78% | 2943 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,905 psi | 72% | 2900 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,672 psi | 70% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,856 psi | 61% | 2776 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,952 psi | 80% | 3009 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,119 psi | 66% | 2884 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,281 psi | 71% | 2943 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,149 psi | 68% | 2802 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,743 psi | 67% | 2835 fps | 99% |
| Bofors RP30 | <<locked>> | 80% | 36,289 psi | 57% | 2707 fps | 96.9% |
| Bofors RP5 | <<locked>> | 80% | 45,905 psi | 72% | 2900 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 34,563 psi | 54% | 2654 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 80% | 42,061 psi | 66% | 2779 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,760 psi | 73% | 2877 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,708 psi | 84% | 2917 fps | 100% |
| Hodgdon Retumbo | 74 gr | 80% | 37,956 psi | 59% | 2828 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,456 psi | 45% | 1749 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,271 psi | 80% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,327 psi | 76% | 2877 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 80% | 46,818 psi | 73% | 2940 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,461 psi | 84% | 2940 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,793 psi | 51% | 2635 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 39,537 psi | 62% | 2690 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 28,819 psi | 45% | 2536 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 48,907 psi | 77% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,908 psi | 78% | 3002 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 43,990 psi | 69% | 2848 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1791 fps | 100% |
| ReloadSwiss RS 76 | 79.2 gr | 80% | 37,333 psi | 59% | 2802 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 36,970 psi | 58% | 2753 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 50,517 psi | 79% | 2923 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 49,356 psi | 77% | 2933 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 45,745 psi | 72% | 2887 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,008 psi | 77% | 2930 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 51,488 psi | 81% | 2910 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 49,777 psi | 78% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,627 psi | 68% | 2779 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 48,921 psi | 77% | 2910 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 49,443 psi | 77% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,443 psi | 76% | 2972 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 40,451 psi | 63% | 2785 fps | 97.4% |
| Vihtavuori N568 | <<locked>> | 82% | 38,116 psi | 60% | 2769 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 88% | 45,121 psi | 71% | 2966 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,627 psi | 68% | 2900 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,067 psi | 78% | 2910 fps | 99.9% |
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 59 powders for 7-.300 Norma Mag. loaded with the .284 | 160gr | Winchester Silvertip. ADI AR 2218 delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,189 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, 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. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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, ADI AR 2218 rank at the top here: for 7-.300 Norma 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, Hodgdon US 869, Lovex D100, Ramshot LRT 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.