Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 139gr | Hornady CX 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 Accurate MAGPRO.
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>> | 92% | 55,985 psi | 88% | 3169 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,623 psi | 89% | 3202 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,824 psi | 86% | 3274 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 88% | 54,259 psi | 85% | 3212 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 55,956 psi | 88% | 3281 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 3238 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3192 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,433 psi | 85% | 3205 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,230 psi | 85% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,392 psi | 90% | 3258 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,086 psi | 88% | 3271 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,566 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,493 psi | 90% | 3310 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,186 psi | 85% | 3268 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,246 psi | 90% | 3235 fps | 97.3% |
| Bofors RP15 | <<locked>> | 94% | 55,274 psi | 87% | 3258 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 3314 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 56,086 psi | 88% | 3271 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,955 psi | 86% | 3143 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 55,782 psi | 87% | 3271 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 54,781 psi | 86% | 3202 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,174 psi | 90% | 3219 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 55,622 psi | 87% | 3212 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,534 psi | 85% | 3192 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,375 psi | 85% | 3120 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,289 psi | 88% | 3396 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,376 psi | 87% | 3238 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 58% | 2054 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,101 psi | 89% | 3192 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,536 psi | 89% | 3173 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,188 psi | 90% | 3192 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,347 psi | 88% | 3192 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 53,998 psi | 85% | 3255 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,859 psi | 69% | 3081 fps | 97.4% |
| Lovex S065 | <<locked>> | 84% | 57,261 psi | 90% | 3169 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,332 psi | 87% | 3163 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,130 psi | 90% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,418 psi | 85% | 3189 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,324 psi | 69% | 3114 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 56,115 psi | 88% | 3294 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,071 psi | 86% | 3182 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,795 psi | 86% | 3278 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 54,157 psi | 85% | 3189 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,551 psi | 90% | 3268 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,956 psi | 59% | 2100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,058 psi | 89% | 3228 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,709 psi | 87% | 3261 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,450 psi | 90% | 3389 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3337 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 55,085 psi | 86% | 3176 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 56,927 psi | 89% | 3248 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 54,955 psi | 86% | 3143 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,261 psi | 90% | 3169 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,332 psi | 87% | 3163 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,347 psi | 88% | 3117 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,507 psi | 89% | 3241 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 56,782 psi | 89% | 3166 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 56,144 psi | 88% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,464 psi | 90% | 3215 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,145 psi | 90% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,811 psi | 89% | 3173 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,246 psi | 90% | 3196 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 56,028 psi | 88% | 3179 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,782 psi | 87% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,782 psi | 87% | 3291 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 56,028 psi | 88% | 3271 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3337 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3327 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,652 psi | 89% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,781 psi | 86% | 3202 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,478 psi | 89% | 3327 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,609 psi | 90% | 3212 fps | 99.8% |
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% | 36,825 psi | 58% | 2799 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 49,400 psi | 77% | 3081 fps | 100% |
| Accurate MAGPRO | 77.3 gr | 84% | 44,092 psi | 69% | 3058 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 41,162 psi | 65% | 2946 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 39,378 psi | 62% | 2933 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 38,203 psi | 60% | 2900 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 88% | 32,126 psi | 50% | 2782 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,611 psi | 65% | 2949 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,514 psi | 74% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,191 psi | 65% | 2940 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,927 psi | 58% | 2871 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,679 psi | 56% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,734 psi | 48% | 2730 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,755 psi | 62% | 2989 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,502 psi | 79% | 3107 fps | 95.7% |
| Bofors RP15 | <<locked>> | 82% | 36,738 psi | 58% | 2864 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 37,449 psi | 59% | 2910 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,927 psi | 58% | 2871 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 51,517 psi | 81% | 3084 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 36,347 psi | 57% | 2854 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 51,140 psi | 80% | 3140 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,432 psi | 84% | 3156 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 41,974 psi | 66% | 2940 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,307 psi | 65% | 2927 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,527 psi | 70% | 2953 fps | 100% |
| Hodgdon Retumbo | 73.1 gr | 84% | 34,432 psi | 54% | 2890 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,387 psi | 81% | 3169 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1837 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,963 psi | 74% | 3012 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,866 psi | 83% | 3110 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,760 psi | 73% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,770 psi | 64% | 2881 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 40,582 psi | 64% | 2976 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,072 psi | 60% | 2946 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,415 psi | 79% | 3054 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,675 psi | 76% | 3045 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,488 psi | 49% | 2657 fps | 96.6% |
| Norma 204 | <<locked>> | 80% | 47,297 psi | 74% | 3054 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 33,156 psi | 52% | 2831 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 38,972 psi | 61% | 2949 fps | 98% |
| Norma URP | <<locked>> | 80% | 48,240 psi | 76% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,623 psi | 59% | 2913 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 47,195 psi | 74% | 3064 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 33,446 psi | 52% | 2772 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 45% | 1883 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,588 psi | 78% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,022 psi | 75% | 3127 fps | 100% |
| ReloadSwiss RS 76 | 76.4 gr | 82% | 31,256 psi | 49% | 2782 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,220 psi | 65% | 3028 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 42,366 psi | 66% | 2927 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,422 psi | 63% | 2923 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,517 psi | 81% | 3084 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,415 psi | 79% | 3054 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,675 psi | 76% | 3045 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,269 psi | 77% | 2995 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,089 psi | 63% | 2917 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 43,178 psi | 68% | 2910 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 45,542 psi | 71% | 3015 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,930 psi | 64% | 2904 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,577 psi | 84% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,806 psi | 78% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,578 psi | 56% | 2762 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 49,095 psi | 77% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,755 psi | 62% | 2913 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 41,959 psi | 66% | 3009 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 39,436 psi | 62% | 2930 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 45,934 psi | 72% | 3123 fps | 96% |
| Vihtavuori N570 | <<locked>> | 98% | 50,169 psi | 79% | 3248 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,037 psi | 77% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,343 psi | 80% | 3143 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,184 psi | 50% | 2854 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,492 psi | 59% | 2818 fps | 96.2% |
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 72 powders for 7-.300 Norma Mag. loaded with the .284 | 139gr | Hornady CX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,396 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,396 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 139.0 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, Bofors RP30 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, Accurate MAGPRO rank at the top here: for 7-.300 Norma Mag. with the .284 | 139gr | Hornady CX 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.