Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 115gr | Sierra VarmintKing bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Reloder-16.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 55,230 psi | 87% | 3422 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,145 psi | 90% | 3468 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,039 psi | 80% | 3415 fps | 97.3% |
| Accurate 4064 | <<locked>> | 86% | 55,695 psi | 87% | 3481 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,768 psi | 89% | 3573 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,795 psi | 86% | 3504 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 88% | 56,115 psi | 88% | 3507 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,985 psi | 89% | 3510 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,129 psi | 86% | 3635 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,652 psi | 89% | 3533 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,000 psi | 89% | 3560 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,217 psi | 90% | 3638 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,143 psi | 86% | 3606 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3583 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,834 psi | 75% | 3445 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 3665 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,897 psi | 86% | 3510 fps | 99.3% |
| Bofors RP3 | <<locked>> | 86% | 54,041 psi | 85% | 3488 fps | 99.9% |
| Bofors RP7 | <<locked>> | 92% | 57,203 psi | 90% | 3514 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,290 psi | 90% | 3537 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,491 psi | 85% | 3494 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,390 psi | 87% | 3556 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 82% | 55,376 psi | 87% | 3517 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,609 psi | 90% | 3550 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,622 psi | 87% | 3550 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,072 psi | 88% | 3593 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 56% | 2293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,507 psi | 89% | 3520 fps | 99.9% |
| IMR 3031 | <<locked>> | 82% | 55,724 psi | 87% | 3507 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,317 psi | 87% | 3488 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,810 psi | 86% | 3455 fps | 97.1% |
| IMR 4350 | <<locked>> | 94% | 54,636 psi | 86% | 3478 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,332 psi | 87% | 3484 fps | 97.1% |
| IMR 4831 | <<locked>> | 96% | 57,174 psi | 90% | 3556 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 54,737 psi | 86% | 3527 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 82% | 56,985 psi | 89% | 3510 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,143 psi | 86% | 3478 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,072 psi | 89% | 3484 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 55,521 psi | 87% | 3484 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,288 psi | 87% | 3481 fps | 98.3% |
| Lovex S070 | <<locked>> | 94% | 56,695 psi | 89% | 3524 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 56,898 psi | 89% | 3504 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,566 psi | 90% | 3507 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,289 psi | 88% | 3543 fps | 99.8% |
| Norma MRPᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3606 fps | 97% |
| Norma URP | <<locked>> | 94% | 55,259 psi | 87% | 3550 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 86% | 57,305 psi | 90% | 3566 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 54,244 psi | 85% | 3533 fps | 97.9% |
| Ramshot TAC | <<locked>> | 82% | 57,464 psi | 90% | 3524 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,421 psi | 90% | 3543 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 57% | 2346 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,563 psi | 86% | 3471 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,157 psi | 85% | 3570 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,476 psi | 85% | 3609 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,811 psi | 89% | 3589 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,477 psi | 87% | 3615 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 82% | 57,479 psi | 90% | 3488 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,566 psi | 90% | 3504 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,696 psi | 90% | 3543 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3566 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 57,203 psi | 90% | 3514 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,288 psi | 87% | 3481 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,143 psi | 86% | 3478 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,521 psi | 87% | 3484 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,695 psi | 89% | 3524 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,927 psi | 88% | 3547 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,130 psi | 88% | 3494 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,956 psi | 89% | 3527 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,288 psi | 85% | 3379 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,288 psi | 87% | 3376 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,347 psi | 87% | 3422 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 57,450 psi | 90% | 3428 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,869 psi | 88% | 3484 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 57,595 psi | 90% | 3540 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,462 psi | 85% | 3560 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3540 fps | 97% |
| Vihtavuori N133 | <<locked>> | 82% | 54,723 psi | 86% | 3366 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,653 psi | 90% | 3468 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,781 psi | 86% | 3422 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,550 psi | 87% | 3451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,682 psi | 90% | 3550 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 57,508 psi | 90% | 3510 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,637 psi | 89% | 3468 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,869 psi | 89% | 3550 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3540 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,085 psi | 85% | 3451 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,390 psi | 87% | 3556 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,250 psi | 68% | 3468 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,188 psi | 90% | 3537 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,443 psi | 76% | 3307 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 49,951 psi | 78% | 3333 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 44,164 psi | 69% | 3271 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,788 psi | 72% | 3297 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 39,697 psi | 62% | 3205 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 51,285 psi | 80% | 3435 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 43,511 psi | 68% | 3245 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,388 psi | 84% | 3445 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,834 psi | 75% | 3478 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,787 psi | 69% | 3274 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,862 psi | 73% | 3356 fps | 98.4% |
| Alliant Reloder-16 | 76.5 gr | 84% | 38,711 psi | 61% | 3219 fps | 95.7% |
| Alliant Reloder-17 | 78.4 gr | 80% | 38,348 psi | 60% | 3228 fps | 97.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,519 psi | 84% | 3514 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 34,287 psi | 54% | 3094 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 92% | 40,915 psi | 64% | 3337 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,242 psi | 80% | 3438 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 43,947 psi | 69% | 3281 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 50,270 psi | 79% | 3379 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,432 psi | 84% | 3468 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,483 psi | 70% | 3284 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 88% | 48,211 psi | 76% | 3409 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,851 psi | 81% | 3451 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 33,605 psi | 53% | 3025 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,414 psi | 76% | 3412 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 88% | 48,167 psi | 75% | 3428 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 42% | 2060 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,501 psi | 78% | 3386 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 52,141 psi | 82% | 3445 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,672 psi | 72% | 3291 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,109 psi | 75% | 3317 fps | 95.4% |
| IMR 4350 | <<locked>> | 92% | 51,169 psi | 80% | 3409 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 48,747 psi | 76% | 3350 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 38,101 psi | 60% | 3146 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 48,051 psi | 75% | 3396 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 53,388 psi | 84% | 3445 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,488 psi | 81% | 3412 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,488 psi | 79% | 3360 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 45,948 psi | 72% | 3297 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 42,975 psi | 67% | 3219 fps | 95.4% |
| Lovex S070 | <<locked>> | 88% | 46,833 psi | 73% | 3323 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,169 psi | 79% | 3379 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 50,720 psi | 79% | 3386 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,224 psi | 72% | 3340 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 50,328 psi | 79% | 3524 fps | 96% |
| Norma URP | <<locked>> | 84% | 39,523 psi | 62% | 3202 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 46,572 psi | 73% | 3356 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 44,251 psi | 69% | 3320 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 53,592 psi | 84% | 3448 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,592 psi | 84% | 3478 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 43% | 2106 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,686 psi | 70% | 3261 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,314 psi | 79% | 3491 fps | 98.9% |
| ReloadSwiss RS 60 | 78.4 gr | 80% | 40,785 psi | 64% | 3317 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 39,653 psi | 62% | 3222 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 41,640 psi | 65% | 3301 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 53,998 psi | 85% | 3428 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,645 psi | 75% | 3320 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 41,321 psi | 65% | 3212 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 98% | 52,576 psi | 82% | 3494 fps | 95% |
| Rottweil R 907 | <<locked>> | 88% | 50,270 psi | 79% | 3379 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 42,975 psi | 67% | 3219 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,488 psi | 81% | 3412 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,948 psi | 72% | 3297 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 46,833 psi | 73% | 3323 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,409 psi | 66% | 3268 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,286 psi | 82% | 3425 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,821 psi | 78% | 3396 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,908 psi | 80% | 3320 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,859 psi | 67% | 3150 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 48,399 psi | 76% | 3287 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,850 psi | 80% | 3317 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,127 psi | 82% | 3415 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 41,800 psi | 66% | 3219 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 30,980 psi | 49% | 2999 fps | 95.8% |
| Somchem S385 | <<locked>> | 96% | 49,937 psi | 78% | 3399 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,387 psi | 81% | 3310 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,543 psi | 75% | 3294 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,124 psi | 75% | 3304 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,900 psi | 63% | 3136 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 38,406 psi | 60% | 3143 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 53,766 psi | 84% | 3445 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,557 psi | 73% | 3284 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 40,582 psi | 64% | 3205 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 37,971 psi | 60% | 3192 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,462 psi | 56% | 3038 fps | 96.7% |
| Winchester 760 | <<locked>> | 88% | 48,385 psi | 76% | 3415 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 92% | 32,750 psi | 51% | 3130 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,922 psi | 78% | 3402 fps | 99.6% |
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 111 powders for .300 Norma Mag. loaded with the .308 | 115gr | Sierra VarmintKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,665 fps; across all powders the maximum-charge window runs from 2,293 fps to 3,665 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Reloder-16 rank at the top here: for .300 Norma Mag. with the .308 | 115gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.