Load Specifications
Load data in caliber 7-.300 Norma Mag. with .284 | 100gr | Sierra VarmintKing bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 and ADI AR 2213.
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 2700 | <<locked>> | 84% | 56,072 psi | 88% | 3530 fps | 98.5% |
| Accurate 3100 | <<locked>> | 96% | 55,187 psi | 86% | 3579 fps | 99.5% |
| Accurate 4350 | <<locked>> | 88% | 56,376 psi | 88% | 3645 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 57,406 psi | 90% | 3619 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,334 psi | 90% | 3691 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 96% | 55,259 psi | 87% | 3678 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,056 psi | 86% | 3583 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,826 psi | 89% | 3714 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,534 psi | 85% | 3668 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,913 psi | 89% | 3678 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,056 psi | 86% | 3675 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,941 psi | 88% | 3665 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 3645 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,913 psi | 89% | 3763 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,012 psi | 85% | 3652 fps | 97.6% |
| Bofors RP3 | <<locked>> | 82% | 56,275 psi | 88% | 3606 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 55,056 psi | 86% | 3675 fps | 97.9% |
| Bofors RP7 | <<locked>> | 86% | 55,419 psi | 87% | 3583 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 82% | 56,376 psi | 88% | 3619 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 55,405 psi | 87% | 3652 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 55,593 psi | 87% | 3622 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,392 psi | 90% | 3622 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3698 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 86% | 55,056 psi | 86% | 3661 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 57% | 2395 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,869 psi | 89% | 3609 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,275 psi | 88% | 3589 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,897 psi | 86% | 3560 fps | 98.8% |
| IMR 4350 | <<locked>> | 90% | 57,029 psi | 89% | 3622 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,898 psi | 89% | 3615 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 54,317 psi | 85% | 3589 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,318 psi | 88% | 3599 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 96% | 57,087 psi | 89% | 3727 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 57,159 psi | 90% | 3593 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,392 psi | 90% | 3612 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 55,564 psi | 87% | 3596 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 3527 fps | 99.2% |
| Norma 204 | <<locked>> | 88% | 54,346 psi | 85% | 3606 fps | 97.4% |
| Norma MRP | <<locked>> | 94% | 54,766 psi | 86% | 3701 fps | 98.9% |
| Norma URP | <<locked>> | 88% | 54,723 psi | 86% | 3622 fps | 99.9% |
| Ramshot Grand | <<locked>> | 94% | 57,232 psi | 90% | 3737 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 57,508 psi | 90% | 3684 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 96% | 54,259 psi | 85% | 3625 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 58% | 2448 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,173 psi | 88% | 3596 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,693 psi | 84% | 3658 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,405 psi | 88% | 3665 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,708 psi | 86% | 3688 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 3694 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 56,318 psi | 88% | 3599 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,868 psi | 86% | 3586 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 94% | 56,188 psi | 88% | 3658 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 86% | 55,419 psi | 87% | 3583 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,392 psi | 90% | 3612 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 57,159 psi | 90% | 3593 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,564 psi | 87% | 3596 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,375 psi | 85% | 3596 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,478 psi | 89% | 3465 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,898 psi | 89% | 3550 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,724 psi | 87% | 3655 fps | 98% |
| Somchem S355 | <<locked>> | 84% | 56,086 psi | 88% | 3596 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,130 psi | 90% | 3570 fps | 96.4% |
| Somchem S365 | <<locked>> | 90% | 54,984 psi | 86% | 3632 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,898 psi | 89% | 3629 fps | 98.8% |
| Unknown powder | <<locked>> | 86% | 54,882 psi | 86% | 3625 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 57,653 psi | 90% | 3560 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,666 psi | 89% | 3615 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,623 psi | 89% | 3599 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 88% | 55,898 psi | 88% | 3619 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 94% | 54,462 psi | 85% | 3632 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,694 psi | 86% | 3684 fps | 96% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,694 psi | 86% | 3652 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,637 psi | 89% | 3563 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,405 psi | 87% | 3652 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3816 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,810 psi | 86% | 3576 fps | 97.7% |
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 2700 | <<locked>> | 80% | 49,081 psi | 77% | 3396 fps | 97.2% |
| Accurate 3100 | <<locked>> | 84% | 36,230 psi | 57% | 3153 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 42,366 psi | 66% | 3356 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,517 psi | 79% | 3488 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 46,688 psi | 73% | 3468 fps | 95.6% |
| ADI AR 2213 | 87.4 gr | 94% | 51,459 psi | 81% | 3599 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,590 psi | 81% | 3520 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,611 psi | 64% | 3366 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,007 psi | 74% | 3524 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 46,615 psi | 73% | 3461 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,614 psi | 70% | 3448 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,124 psi | 47% | 3045 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,519 psi | 54% | 3199 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 82% | 35,534 psi | 56% | 3268 fps | 96.2% |
| Bofors RP15 | <<locked>> | 94% | 47,079 psi | 74% | 3504 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 52,489 psi | 82% | 3537 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 44,614 psi | 70% | 3448 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,513 psi | 71% | 3373 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 52,663 psi | 83% | 3550 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 48,066 psi | 75% | 3501 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 82% | 45,818 psi | 72% | 3415 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,174 psi | 60% | 3228 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 44,193 psi | 69% | 3527 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 43,743 psi | 69% | 3419 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 43% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,301 psi | 84% | 3547 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,574 psi | 78% | 3465 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,501 psi | 76% | 3428 fps | 97.7% |
| IMR 4350 | <<locked>> | 80% | 41,104 psi | 64% | 3274 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,905 psi | 74% | 3409 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 36,622 psi | 57% | 3189 fps | 97% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,866 psi | 83% | 3533 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 49,371 psi | 77% | 3566 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 53,635 psi | 84% | 3530 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,512 psi | 70% | 3350 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 42,815 psi | 67% | 3320 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 37,666 psi | 59% | 3192 fps | 95.7% |
| Norma 204 | <<locked>> | 84% | 47,224 psi | 74% | 3455 fps | 95.6% |
| Norma MRP | 82.6 gr | 86% | 40,901 psi | 64% | 3389 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,727 psi | 65% | 3346 fps | 98.3% |
| Ramshot Grand | <<locked>> | 90% | 48,863 psi | 77% | 3563 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 40,712 psi | 64% | 3323 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 90% | 42,757 psi | 67% | 3376 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 44% | 2205 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,518 psi | 82% | 3527 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,850 psi | 78% | 3589 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,351 psi | 66% | 3369 fps | 98.3% |
| ReloadSwiss RS 70 | 78.4 gr | 80% | 40,857 psi | 64% | 3379 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 41,408 psi | 65% | 3428 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 49,342 psi | 77% | 3468 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 51,416 psi | 81% | 3514 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 45,672 psi | 72% | 3438 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,513 psi | 71% | 3373 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,512 psi | 70% | 3350 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 53,635 psi | 84% | 3530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,815 psi | 67% | 3320 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,778 psi | 80% | 3530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,719 psi | 78% | 3353 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,729 psi | 69% | 3278 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 45,295 psi | 71% | 3432 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,284 psi | 77% | 3465 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,272 psi | 83% | 3497 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 38,435 psi | 60% | 3291 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 43,482 psi | 68% | 3346 fps | 95.9% |
| Unknown powder | <<locked>> | 80% | 44,773 psi | 70% | 3415 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 47,195 psi | 74% | 3376 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,134 psi | 68% | 3343 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 43,018 psi | 67% | 3317 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 42,714 psi | 67% | 3340 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,692 psi | 53% | 3146 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 92% | 50,923 psi | 80% | 3606 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 50,908 psi | 80% | 3573 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,525 psi | 67% | 3301 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 48,066 psi | 75% | 3501 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 28,776 psi | 45% | 3087 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 47,442 psi | 74% | 3428 fps | 96% |
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 87 powders for 7-.300 Norma Mag. loaded with the .284 | 100gr | Sierra VarmintKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,816 fps; across all powders the maximum-charge window runs from 2,395 fps to 3,816 fps. ADI AR 2217 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Norma MRP, ReloadSwiss RS 70, ADI AR 2213 rank at the top here: for 7-.300 Norma Mag. with the .284 | 100gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, Baschieri & Pellagri 109 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.