Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 140gr | NorthFork Bonded Core bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and ReloadSwiss RS 76.
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>> | 88% | 54,085 psi | 85% | 3130 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,739 psi | 89% | 3297 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 86% | 55,521 psi | 87% | 3225 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 57,638 psi | 90% | 3301 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 55,927 psi | 88% | 3264 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3301 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3287 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,477 psi | 87% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,071 psi | 86% | 3212 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,157 psi | 85% | 3228 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,956 psi | 88% | 3196 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,014 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,521 psi | 89% | 3287 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,954 psi | 85% | 3287 fps | 97% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,665 psi | 86% | 3189 fps | 97.2% |
| Bofors RP15 | <<locked>> | 92% | 57,174 psi | 90% | 3281 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,811 psi | 87% | 3278 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 54,157 psi | 85% | 3228 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 57,551 psi | 90% | 3291 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,739 psi | 89% | 3225 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,709 psi | 87% | 3205 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,695 psi | 87% | 3130 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,853 psi | 86% | 3356 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 2073 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,288 psi | 85% | 3140 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,810 psi | 86% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,276 psi | 90% | 3202 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,767 psi | 87% | 3274 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3189 fps | 99% |
| Lovex S070 | <<locked>> | 82% | 56,478 psi | 89% | 3176 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,680 psi | 87% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,463 psi | 87% | 3202 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 50,865 psi | 80% | 3219 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,099 psi | 85% | 3245 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,362 psi | 88% | 3192 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,913 psi | 89% | 3301 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 55,434 psi | 87% | 3199 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,535 psi | 87% | 3222 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 60% | 2123 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,087 psi | 89% | 3268 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,738 psi | 87% | 3343 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,317 psi | 87% | 3301 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 56,144 psi | 88% | 3189 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 54,766 psi | 86% | 3202 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 56,478 psi | 89% | 3176 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,029 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,375 psi | 85% | 3199 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 57,595 psi | 90% | 3176 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 57,682 psi | 90% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,071 psi | 86% | 3166 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,085 psi | 86% | 3153 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,087 psi | 89% | 3186 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,725 psi | 90% | 3225 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,464 psi | 90% | 3310 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 92% | 54,476 psi | 85% | 3232 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 55,796 psi | 87% | 3301 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 98% | 56,884 psi | 89% | 3366 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,377 psi | 90% | 3123 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,564 psi | 87% | 3287 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,042 psi | 86% | 3163 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% | 41,307 psi | 65% | 2890 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 42,699 psi | 67% | 3012 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 45,295 psi | 71% | 3028 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 40,611 psi | 64% | 2956 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 37,014 psi | 58% | 2861 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 48,820 psi | 77% | 3215 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 31,662 psi | 50% | 2756 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,880 psi | 81% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,281 psi | 71% | 3022 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,278 psi | 65% | 2966 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,001 psi | 63% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,548 psi | 54% | 2828 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,136 psi | 71% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,937 psi | 78% | 3209 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,080 psi | 75% | 3058 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 38,421 psi | 60% | 2894 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 36,825 psi | 58% | 2877 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 41,278 psi | 65% | 2966 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 35,143 psi | 55% | 2812 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 43,105 psi | 68% | 2959 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,482 psi | 67% | 2946 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,979 psi | 77% | 3022 fps | 100% |
| Hodgdon Retumbo | 74 gr | 80% | 33,721 psi | 53% | 2854 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 44% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,995 psi | 80% | 3081 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 51,372 psi | 81% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,411 psi | 70% | 2956 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,276 psi | 62% | 2933 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,927 psi | 59% | 2923 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 53,026 psi | 83% | 3114 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,578 psi | 56% | 2753 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 51,793 psi | 81% | 3136 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 31,009 psi | 49% | 2749 fps | 95% |
| Norma MRP | <<locked>> | 80% | 43,758 psi | 69% | 3041 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 52,837 psi | 83% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,131 psi | 61% | 2943 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 80% | 51,851 psi | 81% | 3140 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,143 psi | 55% | 2808 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1903 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,171 psi | 83% | 3205 fps | 100% |
| ReloadSwiss RS 76 | 79.2 gr | 80% | 32,953 psi | 52% | 2825 fps | 96.7% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 40,582 psi | 64% | 2995 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,137 psi | 72% | 3002 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 44,730 psi | 70% | 3009 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 53,026 psi | 83% | 3114 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,301 psi | 84% | 3064 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,382 psi | 70% | 3002 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 47,210 psi | 74% | 2989 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 50,488 psi | 79% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,295 psi | 71% | 2986 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 39,494 psi | 62% | 2848 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 80% | 53,606 psi | 84% | 3130 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,440 psi | 70% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,540 psi | 68% | 3035 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 38,682 psi | 61% | 2897 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 41,814 psi | 66% | 3015 fps | 95% |
| Vihtavuori N570 | 90.2 gr | 94% | 49,211 psi | 77% | 3215 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,708 psi | 84% | 3068 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,666 psi | 59% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,524 psi | 65% | 2904 fps | 97.8% |
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 67 powders for 7-.300 Norma Mag. loaded with the .284 | 140gr | NorthFork Bonded Core. Vihtavuori N570 delivers the highest muzzle velocity at 3,366 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,366 fps. Accurate 8700 gives the best case fill at 100 %, and 67 of the 67 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 140.0 gr projectile in 0.284" calls for a 1:11.0 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, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7-.300 Norma Mag. with the .284 | 140gr | NorthFork Bonded Core they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.