Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 139gr | Sellier & Bellot SPRN bullet and 62 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 80 and Vihtavuori N568.
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>> | 90% | 57,595 psi | 90% | 3192 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,594 psi | 89% | 3304 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 55,187 psi | 86% | 3228 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 57,261 psi | 90% | 3304 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 55,753 psi | 87% | 3268 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 3297 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3291 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,361 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,737 psi | 86% | 3215 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,638 psi | 90% | 3297 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,564 psi | 87% | 3199 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,637 psi | 87% | 3274 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,304 psi | 88% | 3294 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,505 psi | 84% | 3287 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,360 psi | 85% | 3192 fps | 97.1% |
| Bofors RP15 | <<locked>> | 92% | 56,811 psi | 89% | 3284 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,390 psi | 87% | 3281 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 57,638 psi | 90% | 3297 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,363 psi | 90% | 3294 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,594 psi | 89% | 3232 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,376 psi | 87% | 3209 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,564 psi | 87% | 3136 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,650 psi | 86% | 3363 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 2080 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,696 psi | 90% | 3205 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,491 psi | 85% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,956 psi | 89% | 3205 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,608 psi | 87% | 3284 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,632 psi | 78% | 3192 fps | 98.9% |
| Lovex S070 | <<locked>> | 82% | 56,188 psi | 88% | 3179 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,550 psi | 87% | 3163 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,129 psi | 86% | 3205 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 50,444 psi | 79% | 3222 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 53,925 psi | 85% | 3251 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,072 psi | 88% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,739 psi | 89% | 3307 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 55,100 psi | 86% | 3202 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,114 psi | 86% | 3225 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 60% | 2126 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,913 psi | 89% | 3274 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,535 psi | 87% | 3350 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,897 psi | 86% | 3301 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 86% | 55,854 psi | 88% | 3196 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,447 psi | 85% | 3205 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 56,188 psi | 88% | 3179 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,739 psi | 89% | 3130 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,725 psi | 90% | 3264 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 57,450 psi | 90% | 3182 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 57,551 psi | 90% | 3202 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,955 psi | 86% | 3176 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,566 psi | 90% | 3186 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,766 psi | 86% | 3156 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 96% | 57,740 psi | 90% | 3232 fps | 96% |
| Vihtavuori N550 | <<locked>> | 82% | 56,956 psi | 89% | 3192 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,566 psi | 90% | 3232 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,290 psi | 90% | 3317 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 92% | 54,143 psi | 85% | 3235 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 55,405 psi | 87% | 3304 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 98% | 56,637 psi | 89% | 3369 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,290 psi | 90% | 3130 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,114 psi | 86% | 3291 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,679 psi | 86% | 3166 fps | 99.7% |
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% | 41,060 psi | 64% | 2890 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 42,395 psi | 66% | 3015 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 45,049 psi | 71% | 3031 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 40,379 psi | 63% | 2959 fps | 96.1% |
| ADI AR 2217 | <<locked>> | 86% | 36,912 psi | 58% | 2864 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 48,428 psi | 76% | 3215 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 31,444 psi | 49% | 2756 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,793 psi | 81% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,991 psi | 71% | 3025 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,031 psi | 64% | 2969 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,755 psi | 62% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,330 psi | 54% | 2831 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,788 psi | 70% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,545 psi | 78% | 3209 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,863 psi | 75% | 3058 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 38,174 psi | 60% | 2897 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 36,695 psi | 57% | 2881 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 41,031 psi | 64% | 2969 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 82% | 35,041 psi | 55% | 2818 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 43,004 psi | 67% | 2966 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,192 psi | 66% | 2946 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,675 psi | 76% | 3028 fps | 100% |
| Hodgdon Retumbo | 74 gr | 80% | 33,504 psi | 53% | 2858 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,720 psi | 79% | 3087 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 51,097 psi | 80% | 3094 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,150 psi | 69% | 2959 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 39,030 psi | 61% | 2936 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,637 psi | 59% | 2923 fps | 95.5% |
| Lovex S070 | <<locked>> | 80% | 52,765 psi | 83% | 3120 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,346 psi | 55% | 2756 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 51,503 psi | 81% | 3136 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 32,967 psi | 52% | 2818 fps | 96% |
| Norma MRP | <<locked>> | 80% | 43,453 psi | 68% | 3048 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 52,562 psi | 82% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,001 psi | 61% | 2946 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 51,532 psi | 81% | 3140 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,012 psi | 55% | 2808 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 45% | 1909 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,852 psi | 83% | 3205 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,735 psi | 51% | 2825 fps | 96.5% |
| ReloadSwiss RS 80 | 87.8 gr | 88% | 40,277 psi | 63% | 2999 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 46,050 psi | 72% | 3005 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 44,469 psi | 70% | 3012 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 80% | 52,765 psi | 83% | 3120 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,272 psi | 83% | 3071 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,135 psi | 69% | 3005 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 46,949 psi | 74% | 2992 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 50,183 psi | 79% | 3087 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,020 psi | 71% | 2989 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 53,969 psi | 85% | 3130 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,262 psi | 62% | 2851 fps | 97.7% |
| Vihtavuori N170 | <<locked>> | 94% | 53,795 psi | 84% | 3163 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 53,330 psi | 84% | 3133 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,280 psi | 69% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,250 psi | 68% | 3035 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 38,421 psi | 60% | 2900 fps | 95.1% |
| Vihtavuori N568 | 86.9 gr | 90% | 44,744 psi | 70% | 3091 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 48,820 psi | 77% | 3215 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,417 psi | 84% | 3074 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,333 psi | 59% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,423 psi | 65% | 2910 fps | 97.7% |
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 68 powders for 7-.300 Norma Mag. loaded with the .284 | 139gr | Sellier & Bellot SPRN. Vihtavuori N570 delivers the highest muzzle velocity at 3,369 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,369 fps. Accurate 8700 gives the best case fill at 100 %, and 68 of the 68 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 139.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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 80, Vihtavuori N568 rank at the top here: for 7-.300 Norma Mag. with the .284 | 139gr | Sellier & Bellot SPRN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, 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.