Load Specifications
Load data in caliber .300 PRC with .308 | 115gr | Sierra VarmintKing bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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 2015 | <<locked>> | 82% | 56,246 psi | 87% | 3396 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,115 psi | 86% | 3422 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,406 psi | 88% | 3491 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 58,320 psi | 90% | 3465 fps | 96.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,674 psi | 73% | 3327 fps | 96% |
| Accurate 4064 | <<locked>> | 88% | 56,231 psi | 87% | 3471 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,130 psi | 88% | 3556 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 84% | 55,840 psi | 86% | 3501 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 90% | 56,898 psi | 88% | 3497 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 58,117 psi | 89% | 3510 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,680 psi | 86% | 3428 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,115 psi | 86% | 3629 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,522 psi | 88% | 3527 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,856 psi | 89% | 3553 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,682 psi | 89% | 3625 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,651 psi | 86% | 3599 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,686 psi | 69% | 3356 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,314 psi | 79% | 3563 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,883 psi | 86% | 3504 fps | 99.2% |
| Bofors RP3 | <<locked>> | 90% | 58,697 psi | 90% | 3547 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 58,131 psi | 89% | 3504 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,912 psi | 86% | 3432 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 58,204 psi | 90% | 3533 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,419 psi | 85% | 3491 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 94% | 55,811 psi | 86% | 3543 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 56,420 psi | 87% | 3514 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 58,073 psi | 89% | 3540 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,449 psi | 87% | 3547 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,681 psi | 87% | 3579 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 55% | 2260 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,580 psi | 89% | 3517 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 56,449 psi | 87% | 3504 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,318 psi | 87% | 3484 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,999 psi | 86% | 3451 fps | 96.9% |
| IMR 4350 | <<locked>> | 96% | 55,419 psi | 85% | 3468 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,333 psi | 87% | 3478 fps | 96.9% |
| IMR 4831 | <<locked>> | 98% | 57,508 psi | 88% | 3543 fps | 99.3% |
| IMR 4895 | <<locked>> | 86% | 55,579 psi | 86% | 3520 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 84% | 58,117 psi | 89% | 3510 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,941 psi | 86% | 3474 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 58,363 psi | 90% | 3481 fps | 99.8% |
| Lovex S062 | <<locked>> | 88% | 56,434 psi | 87% | 3478 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,043 psi | 86% | 3471 fps | 98.1% |
| Lovex S070 | <<locked>> | 96% | 57,406 psi | 88% | 3510 fps | 97.4% |
| Norma 201 | <<locked>> | 86% | 58,030 psi | 89% | 3501 fps | 100% |
| Norma 202 | <<locked>> | 86% | 58,711 psi | 90% | 3504 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,101 psi | 88% | 3537 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 55,796 psi | 86% | 3537 fps | 99% |
| Ramshot Big Game | <<locked>> | 88% | 58,276 psi | 90% | 3563 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 58,595 psi | 90% | 3593 fps | 98.3% |
| Ramshot TAC | <<locked>> | 84% | 58,653 psi | 90% | 3520 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 58,639 psi | 90% | 3543 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 56% | 2313 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,709 psi | 86% | 3468 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,882 psi | 84% | 3560 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,042 psi | 85% | 3602 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,130 psi | 88% | 3576 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,202 psi | 86% | 3606 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 58,523 psi | 90% | 3484 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 58,566 psi | 90% | 3497 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 58,508 psi | 90% | 3537 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 58,131 psi | 89% | 3504 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,043 psi | 86% | 3471 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,941 psi | 86% | 3474 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,434 psi | 87% | 3478 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,406 psi | 88% | 3510 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,565 psi | 87% | 3540 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,363 psi | 88% | 3494 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,899 psi | 89% | 3524 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,434 psi | 85% | 3379 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,188 psi | 86% | 3369 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,260 psi | 87% | 3415 fps | 97% |
| Somchem S335 | <<locked>> | 86% | 58,697 psi | 90% | 3428 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,869 psi | 87% | 3481 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 58,436 psi | 90% | 3533 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 58,450 psi | 90% | 3609 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 58,363 psi | 90% | 3392 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,796 psi | 86% | 3363 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 58,624 psi | 90% | 3461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,695 psi | 86% | 3419 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,420 psi | 87% | 3448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 58,204 psi | 90% | 3537 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 58,784 psi | 90% | 3510 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,711 psi | 89% | 3465 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,464 psi | 88% | 3540 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,821 psi | 77% | 3455 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 58,769 psi | 90% | 3507 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,390 psi | 85% | 3497 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,072 psi | 86% | 3550 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,480 psi | 62% | 3363 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 58,233 psi | 90% | 3533 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 2015 | <<locked>> | 80% | 52,794 psi | 81% | 3340 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,963 psi | 71% | 3245 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,650 psi | 83% | 3425 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,607 psi | 84% | 3399 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 44,324 psi | 68% | 3258 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,424 psi | 67% | 3232 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 40,001 psi | 62% | 3199 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 48,950 psi | 75% | 3366 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,510 psi | 64% | 3176 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,053 psi | 79% | 3379 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 52,069 psi | 80% | 3373 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,194 psi | 70% | 3396 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,510 psi | 64% | 3202 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,570 psi | 69% | 3281 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 39,059 psi | 60% | 3209 fps | 95.3% |
| Alliant Reloder-17 | 74.6 gr | 80% | 36,318 psi | 56% | 3153 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 34,476 psi | 53% | 3084 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 41,031 psi | 63% | 3317 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,689 psi | 75% | 3366 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 41,655 psi | 64% | 3209 fps | 98.2% |
| Bofors RP7 | <<locked>> | 90% | 51,155 psi | 79% | 3373 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,417 psi | 81% | 3366 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,691 psi | 78% | 3399 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 42,206 psi | 65% | 3209 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 90% | 48,762 psi | 75% | 3399 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,458 psi | 76% | 3383 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 33,866 psi | 52% | 3015 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,963 psi | 71% | 3343 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 52,736 psi | 81% | 3504 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 41% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,413 psi | 73% | 3323 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 49,472 psi | 76% | 3383 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,613 psi | 67% | 3222 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,240 psi | 76% | 3314 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 51,909 psi | 80% | 3399 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,719 psi | 76% | 3346 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 38,377 psi | 59% | 3136 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 45,687 psi | 70% | 3320 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 51,053 psi | 79% | 3379 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 48,863 psi | 75% | 3346 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,443 psi | 75% | 3294 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 43,772 psi | 67% | 3232 fps | 98.9% |
| Lovex S065 | <<locked>> | 86% | 43,671 psi | 67% | 3215 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 47,340 psi | 73% | 3310 fps | 95% |
| Norma 201 | <<locked>> | 80% | 47,964 psi | 74% | 3314 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 48,298 psi | 74% | 3320 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,932 psi | 68% | 3268 fps | 97.9% |
| Norma URP | <<locked>> | 86% | 39,856 psi | 61% | 3196 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,932 psi | 68% | 3281 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 47,718 psi | 73% | 3383 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 51,314 psi | 79% | 3383 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,155 psi | 79% | 3409 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,890 psi | 41% | 2077 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,718 psi | 75% | 3330 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,587 psi | 73% | 3412 fps | 98.1% |
| ReloadSwiss RS 60 | 74.6 gr | 80% | 38,638 psi | 59% | 3241 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 39,900 psi | 61% | 3212 fps | 95% |
| ReloadSwiss RS 70 | 83.3 gr | 88% | 42,221 psi | 65% | 3294 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 51,750 psi | 80% | 3369 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,614 psi | 70% | 3255 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 39,059 psi | 60% | 3140 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 51,155 psi | 79% | 3373 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 43,671 psi | 67% | 3215 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,863 psi | 75% | 3346 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,772 psi | 67% | 3232 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 90% | 47,340 psi | 73% | 3310 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,147 psi | 62% | 3192 fps | 96.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,879 psi | 77% | 3353 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,529 psi | 73% | 3323 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,805 psi | 75% | 3261 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,930 psi | 63% | 3087 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,327 psi | 76% | 3281 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,747 psi | 75% | 3258 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,545 psi | 76% | 3346 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 39,755 psi | 61% | 3146 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 31,198 psi | 48% | 2992 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 54,839 psi | 84% | 3337 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 49,226 psi | 76% | 3251 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,194 psi | 70% | 3235 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,818 psi | 70% | 3241 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,811 psi | 58% | 3068 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 41,495 psi | 64% | 3199 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 51,387 psi | 79% | 3376 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 44,309 psi | 68% | 3219 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 41,075 psi | 63% | 3199 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 37,956 psi | 58% | 3179 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,620 psi | 52% | 2963 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 51,619 psi | 79% | 3428 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,994 psi | 75% | 3406 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 32,924 psi | 51% | 3110 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,456 psi | 73% | 3330 fps | 99.1% |
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 109 powders for .300 PRC loaded with the .308 | 115gr | Sierra VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,629 fps; across all powders the maximum-charge window runs from 2,260 fps to 3,629 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, 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, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 PRC with the .308 | 115gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, 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.