Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 127gr | Geco ZERO LG bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD 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>> | 92% | 54,331 psi | 85% | 3261 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,085 psi | 86% | 3301 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,334 psi | 90% | 3435 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 56,347 psi | 88% | 3369 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 92% | 54,462 psi | 85% | 3369 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3323 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,949 psi | 74% | 3271 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,681 psi | 89% | 3366 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,434 psi | 88% | 3373 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,551 psi | 90% | 3383 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,999 psi | 88% | 3353 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,578 psi | 86% | 3363 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,825 psi | 87% | 3337 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,724 psi | 87% | 3406 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,521 psi | 89% | 3428 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,985 psi | 88% | 3320 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 57,334 psi | 90% | 3412 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,230 psi | 87% | 3396 fps | 99% |
| Bofors RP5 | <<locked>> | 92% | 54,578 psi | 86% | 3363 fps | 99.3% |
| Bofors RP7 | <<locked>> | 84% | 57,174 psi | 90% | 3307 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 98% | 54,070 psi | 85% | 3356 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 57,043 psi | 89% | 3366 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,680 psi | 87% | 3317 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 90% | 54,128 psi | 85% | 3301 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,884 psi | 89% | 3350 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,550 psi | 89% | 3281 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,433 psi | 85% | 3481 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 82% | 53,795 psi | 84% | 3330 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,043 psi | 58% | 2149 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,666 psi | 87% | 3291 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,071 psi | 86% | 3274 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 55,622 psi | 87% | 3294 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,911 psi | 86% | 3284 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 94% | 56,173 psi | 88% | 3412 fps | 98.8% |
| Lovex S065 | <<locked>> | 84% | 55,869 psi | 88% | 3271 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,537 psi | 90% | 3323 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,637 psi | 87% | 3284 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,797 psi | 89% | 3353 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 42,627 psi | 67% | 3182 fps | 98.4% |
| Norma MRP | <<locked>> | 90% | 54,433 psi | 85% | 3386 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 57,246 psi | 90% | 3343 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,276 psi | 90% | 3438 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 56,376 psi | 88% | 3350 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,724 psi | 87% | 3356 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2198 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,419 psi | 87% | 3327 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,969 psi | 85% | 3356 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,477 psi | 87% | 3474 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3415 fps | 97.9% |
| Rottweil R 904 | <<locked>> | 90% | 57,305 psi | 90% | 3337 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 90% | 55,492 psi | 87% | 3343 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 57,174 psi | 90% | 3307 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,869 psi | 88% | 3271 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,537 psi | 90% | 3323 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,056 psi | 86% | 3219 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,071 psi | 86% | 3340 fps | 99.4% |
| Somchem S361 | <<locked>> | 88% | 55,274 psi | 87% | 3258 fps | 98.1% |
| Somchem S365 | <<locked>> | 86% | 54,447 psi | 85% | 3291 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,724 psi | 87% | 3307 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 55,825 psi | 87% | 3209 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,390 psi | 87% | 3278 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,753 psi | 87% | 3291 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 54,534 psi | 85% | 3278 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,711 psi | 90% | 3366 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,201 psi | 85% | 3379 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 96% | 54,360 psi | 85% | 3356 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3419 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,056 psi | 86% | 3225 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,043 psi | 89% | 3366 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,418 psi | 85% | 3422 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,854 psi | 88% | 3304 fps | 99.4% |
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% | 35,520 psi | 56% | 2867 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 47,805 psi | 75% | 3173 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 45,876 psi | 72% | 3205 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 39,871 psi | 62% | 3025 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 43,903 psi | 69% | 3153 fps | 96% |
| ADI AR 2217 | <<locked>> | 94% | 42,467 psi | 67% | 3107 fps | 96% |
| ADI AR 2225 | <<locked>> | 90% | 33,286 psi | 52% | 2907 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,306 psi | 63% | 3028 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,876 psi | 72% | 3182 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,505 psi | 84% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,914 psi | 63% | 3018 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,377 psi | 60% | 3015 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,258 psi | 54% | 2904 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,689 psi | 47% | 2789 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,174 psi | 60% | 3061 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,489 psi | 82% | 3255 fps | 95.4% |
| Bofors RP15 | <<locked>> | 84% | 38,174 psi | 60% | 3005 fps | 95.3% |
| Bofors RP30 | <<locked>> | 92% | 41,713 psi | 65% | 3120 fps | 96% |
| Bofors RP5 | <<locked>> | 82% | 38,377 psi | 60% | 3015 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 50,270 psi | 79% | 3182 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 40,654 psi | 64% | 3068 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 49,690 psi | 78% | 3232 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 52,112 psi | 82% | 3251 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 43,801 psi | 69% | 3091 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,960 psi | 67% | 3071 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,236 psi | 68% | 3048 fps | 100% |
| Hodgdon Retumbo | 77.5 gr | 86% | 35,694 psi | 56% | 3028 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,835 psi | 78% | 3258 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1929 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,701 psi | 72% | 3100 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,605 psi | 81% | 3209 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 45,339 psi | 71% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,380 psi | 66% | 3025 fps | 95% |
| IMR 7828 SSC | <<locked>> | 86% | 42,250 psi | 66% | 3123 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 49,008 psi | 77% | 3150 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 47,413 psi | 74% | 3136 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 30,371 psi | 48% | 2723 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 45,948 psi | 72% | 3143 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 34,345 psi | 54% | 2963 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 37,536 psi | 59% | 3022 fps | 96.8% |
| Norma URP | <<locked>> | 80% | 46,833 psi | 73% | 3156 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 42,264 psi | 66% | 3136 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 45,803 psi | 72% | 3150 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 34,954 psi | 55% | 2913 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,253 psi | 44% | 1972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,979 psi | 75% | 3192 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,485 psi | 73% | 3219 fps | 100% |
| ReloadSwiss RS 76 | 82.9 gr | 86% | 34,998 psi | 55% | 2995 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 46,499 psi | 73% | 3255 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 41,176 psi | 65% | 3005 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 39,276 psi | 62% | 3002 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 50,270 psi | 79% | 3182 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,008 psi | 77% | 3150 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 47,413 psi | 74% | 3136 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,153 psi | 75% | 3094 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,943 psi | 61% | 2995 fps | 95.9% |
| Somchem S361 | <<locked>> | 82% | 45,020 psi | 71% | 3054 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 43,976 psi | 69% | 3107 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,740 psi | 62% | 2982 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 52,199 psi | 82% | 3150 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,341 psi | 76% | 3153 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,883 psi | 58% | 2900 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 47,776 psi | 75% | 3153 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,421 psi | 60% | 2992 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 84% | 43,685 psi | 68% | 3159 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 90% | 43,990 psi | 69% | 3143 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 96% | 47,834 psi | 75% | 3271 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,863 psi | 75% | 3107 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,893 psi | 78% | 3235 fps | 99.5% |
| Winchester StaBALL HD | 74 gr | 80% | 30,618 psi | 48% | 2913 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,160 psi | 61% | 2963 fps | 95.9% |
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 71 powders for 7-.300 Norma Mag. loaded with the .284 | 127gr | Geco ZERO LG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,149 fps to 3,481 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 127.0 gr projectile in 0.284" calls for a 1:9.0 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for 7-.300 Norma Mag. with the .284 | 127gr | Geco ZERO LG 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.