Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC 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% | 54,230 psi | 85% | 3130 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,927 psi | 89% | 3301 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 86% | 55,477 psi | 87% | 3222 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 57,580 psi | 90% | 3297 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 56,086 psi | 88% | 3268 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 3297 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 3287 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,651 psi | 87% | 3219 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,013 psi | 86% | 3212 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,114 psi | 85% | 3228 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,883 psi | 88% | 3196 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,985 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,666 psi | 89% | 3287 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,882 psi | 84% | 3284 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,607 psi | 86% | 3186 fps | 97.2% |
| Bofors RP15 | <<locked>> | 92% | 57,130 psi | 90% | 3278 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,724 psi | 87% | 3278 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 54,114 psi | 85% | 3228 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 57,711 psi | 90% | 3294 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,884 psi | 89% | 3228 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,651 psi | 87% | 3205 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,840 psi | 88% | 3130 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,013 psi | 86% | 3356 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 59% | 2073 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,244 psi | 85% | 3140 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,766 psi | 86% | 3146 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,203 psi | 90% | 3202 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,927 psi | 88% | 3278 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,966 psi | 78% | 3192 fps | 99% |
| Lovex S070 | <<locked>> | 82% | 56,434 psi | 88% | 3173 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,854 psi | 88% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,390 psi | 87% | 3199 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 50,807 psi | 80% | 3219 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,244 psi | 85% | 3248 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,347 psi | 88% | 3192 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,101 psi | 89% | 3301 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 55,376 psi | 87% | 3199 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,463 psi | 87% | 3222 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,479 psi | 60% | 2119 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,232 psi | 90% | 3268 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,927 psi | 88% | 3346 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,274 psi | 87% | 3301 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 56,115 psi | 88% | 3189 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 54,723 psi | 86% | 3202 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 56,434 psi | 88% | 3173 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,985 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,331 psi | 85% | 3196 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 57,711 psi | 90% | 3179 fps | 99.2% |
| Somchem S365 | <<locked>> | 82% | 53,969 psi | 85% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,230 psi | 87% | 3169 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,042 psi | 86% | 3153 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,232 psi | 90% | 3189 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,273 psi | 85% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,609 psi | 90% | 3314 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 92% | 54,462 psi | 85% | 3232 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 55,767 psi | 87% | 3301 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 98% | 57,014 psi | 89% | 3369 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,551 psi | 90% | 3123 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,492 psi | 87% | 3284 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,969 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% | 41,292 psi | 65% | 2887 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 42,656 psi | 67% | 3012 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 45,281 psi | 71% | 3028 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 40,596 psi | 64% | 2956 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 37,130 psi | 58% | 2861 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 98% | 48,733 psi | 76% | 3212 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 29,646 psi | 46% | 2687 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,069 psi | 82% | 3159 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,223 psi | 71% | 3022 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,263 psi | 65% | 2963 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,987 psi | 63% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,534 psi | 54% | 2828 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,092 psi | 71% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,893 psi | 78% | 3209 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,066 psi | 75% | 3058 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 38,406 psi | 60% | 2894 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 36,941 psi | 58% | 2877 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 41,263 psi | 65% | 2963 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 82% | 35,244 psi | 55% | 2815 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 43,236 psi | 68% | 2959 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,424 psi | 66% | 2943 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,921 psi | 77% | 3022 fps | 100% |
| Hodgdon Retumbo | 74 gr | 80% | 33,707 psi | 53% | 2858 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1857 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,937 psi | 80% | 3081 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 51,358 psi | 80% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,367 psi | 70% | 2956 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,262 psi | 62% | 2933 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,913 psi | 59% | 2923 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 53,011 psi | 83% | 3117 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,549 psi | 56% | 2753 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 51,764 psi | 81% | 3133 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 30,980 psi | 49% | 2749 fps | 95% |
| Norma MRP | <<locked>> | 80% | 43,729 psi | 69% | 3041 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 52,823 psi | 83% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,247 psi | 62% | 2943 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 80% | 51,779 psi | 81% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,244 psi | 55% | 2808 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,906 psi | 45% | 1903 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,156 psi | 83% | 3202 fps | 100% |
| ReloadSwiss RS 76 | 79.2 gr | 80% | 32,938 psi | 52% | 2825 fps | 96.7% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 40,582 psi | 64% | 2995 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,267 psi | 73% | 3002 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 44,715 psi | 70% | 3009 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 53,011 psi | 83% | 3117 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,519 psi | 84% | 3068 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,367 psi | 70% | 3005 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 47,181 psi | 74% | 2986 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 50,473 psi | 79% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,252 psi | 71% | 2986 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 39,479 psi | 62% | 2848 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 80% | 53,577 psi | 84% | 3127 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,541 psi | 70% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,497 psi | 68% | 3035 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 38,667 psi | 61% | 2897 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 41,771 psi | 65% | 3015 fps | 95% |
| Vihtavuori N570 | 90.2 gr | 94% | 49,168 psi | 77% | 3212 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,664 psi | 84% | 3068 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,637 psi | 59% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,640 psi | 65% | 2907 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 | Alaska Bullet Works Kodiak SP SPBC. Vihtavuori N570 delivers the highest muzzle velocity at 3,369 fps; across all powders the maximum-charge window runs from 2,073 fps to 3,369 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 1:12.5 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 | Alaska Bullet Works Kodiak SP SPBC 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.