Load Specifications
Load data in caliber .300 PRC with .308 | 136gr | Geco ZERO bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-26.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 57,130 psi | 88% | 3202 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,506 psi | 85% | 3215 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,534 psi | 82% | 3241 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 57,740 psi | 89% | 3264 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,492 psi | 85% | 3314 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 56,942 psi | 88% | 3297 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 58,320 psi | 90% | 3301 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,855 psi | 87% | 3356 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,131 psi | 89% | 3438 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,492 psi | 85% | 3268 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,753 psi | 86% | 3291 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,463 psi | 87% | 3383 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,044 psi | 89% | 3409 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,173 psi | 86% | 3340 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,403 psi | 82% | 3330 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,241 psi | 77% | 3264 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,758 psi | 67% | 3159 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,740 psi | 90% | 3488 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,246 psi | 88% | 3310 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 56,391 psi | 87% | 3284 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,403 psi | 82% | 3330 fps | 96.7% |
| Bofors RP7 | <<locked>> | 90% | 55,811 psi | 86% | 3261 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 56,840 psi | 87% | 3301 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 58,001 psi | 89% | 3373 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 57,653 psi | 89% | 3330 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 82% | 57,624 psi | 89% | 3307 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,623 psi | 87% | 3294 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 58,363 psi | 90% | 3346 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,708 psi | 84% | 3340 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 55% | 2100 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,784 psi | 90% | 3310 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 58,189 psi | 90% | 3287 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,682 psi | 89% | 3284 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,927 psi | 88% | 3261 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 57,058 psi | 88% | 3297 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,551 psi | 89% | 3294 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 55,999 psi | 86% | 3304 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 57,232 psi | 88% | 3323 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 57,450 psi | 88% | 3268 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,651 psi | 86% | 3215 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,841 psi | 89% | 3278 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,566 psi | 89% | 3287 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 55,434 psi | 85% | 3271 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,961 psi | 68% | 3061 fps | 96.9% |
| Norma 201 | <<locked>> | 82% | 55,376 psi | 85% | 3232 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,275 psi | 87% | 3232 fps | 100% |
| Norma 203B | <<locked>> | 86% | 58,552 psi | 90% | 3337 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,305 psi | 90% | 3353 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 57,043 psi | 88% | 3428 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 57,899 psi | 89% | 3360 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,970 psi | 86% | 3301 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 57,072 psi | 88% | 3353 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,651 psi | 56% | 2149 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,840 psi | 87% | 3281 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,884 psi | 88% | 3369 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,348 psi | 88% | 3402 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,622 psi | 86% | 3337 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,407 psi | 90% | 3435 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,144 psi | 86% | 3235 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,449 psi | 87% | 3281 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,653 psi | 90% | 3327 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 98% | 55,245 psi | 85% | 3320 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 90% | 55,811 psi | 86% | 3261 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,566 psi | 89% | 3287 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,450 psi | 88% | 3268 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,841 psi | 89% | 3278 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,434 psi | 85% | 3271 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,494 psi | 90% | 3346 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 58,523 psi | 90% | 3301 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,608 psi | 86% | 3261 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,231 psi | 87% | 3166 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,566 psi | 89% | 3166 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,406 psi | 88% | 3235 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,740 psi | 90% | 3383 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 55,985 psi | 86% | 3156 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,189 psi | 90% | 3284 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,289 psi | 87% | 3274 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,522 psi | 88% | 3360 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,869 psi | 86% | 3294 fps | 98% |
| Vihtavuori N133 | <<locked>> | 82% | 56,826 psi | 87% | 3146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,463 psi | 87% | 3196 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,898 psi | 88% | 3209 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,870 psi | 89% | 3248 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,507 psi | 87% | 3294 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,793 psi | 80% | 3202 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 55,274 psi | 85% | 3199 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,506 psi | 85% | 3294 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,159 psi | 86% | 3353 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,579 psi | 87% | 3258 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,204 psi | 90% | 3373 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,600 psi | 70% | 3314 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,651 psi | 86% | 3268 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,521 psi | 87% | 3291 fps | 97.1% |
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% | 50,082 psi | 77% | 3094 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,457 psi | 75% | 3084 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 40,219 psi | 62% | 2976 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,485 psi | 73% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,969 psi | 55% | 2900 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 53,330 psi | 82% | 3235 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,223 psi | 70% | 3058 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 94% | 49,734 psi | 77% | 3219 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,140 psi | 77% | 3294 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,527 psi | 70% | 3084 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,805 psi | 75% | 3166 fps | 99.5% |
| Alliant Reloder-16 | 69.2 gr | 80% | 35,317 psi | 54% | 2917 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,306 psi | 62% | 3068 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 49,066 psi | 75% | 3202 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 49,763 psi | 77% | 3258 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 31,357 psi | 48% | 2808 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 96% | 38,334 psi | 59% | 3018 fps | 95.6% |
| Alliant Reloder-26 | 84.1 gr | 88% | 36,985 psi | 57% | 3025 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,417 psi | 82% | 3245 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 45,818 psi | 70% | 3094 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 49,763 psi | 77% | 3258 fps | 95.8% |
| Bofors RP7 | <<locked>> | 84% | 46,021 psi | 71% | 3068 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 46,224 psi | 71% | 3100 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 44,005 psi | 68% | 3097 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 47,253 psi | 73% | 3130 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,940 psi | 83% | 3248 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,822 psi | 50% | 2799 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,821 psi | 78% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 43,540 psi | 67% | 3110 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 41% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,692 psi | 80% | 3189 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,505 psi | 84% | 3232 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,529 psi | 73% | 3104 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,980 psi | 77% | 3130 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 43,990 psi | 68% | 3041 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,945 psi | 65% | 2979 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 34,650 psi | 53% | 2848 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 50,067 psi | 77% | 3199 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 53,650 psi | 83% | 3205 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,344 psi | 81% | 3159 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 47,703 psi | 73% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,276 psi | 60% | 2917 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 42,627 psi | 66% | 3012 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 38,508 psi | 59% | 2933 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 52,025 psi | 80% | 3176 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,620 psi | 81% | 3173 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,138 psi | 74% | 3150 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 50,618 psi | 78% | 3215 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 42,641 psi | 66% | 3133 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,998 psi | 55% | 2900 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,602 psi | 75% | 3169 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 40,335 psi | 62% | 3015 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 42% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,499 psi | 72% | 3087 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,852 psi | 81% | 3297 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,931 psi | 66% | 3140 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,969 psi | 55% | 2917 fps | 95.5% |
| ReloadSwiss RS 70 | 77.6 gr | 82% | 37,739 psi | 58% | 2992 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 49,487 psi | 76% | 3120 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,946 psi | 66% | 3028 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 54,839 psi | 84% | 3261 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 48,182 psi | 74% | 3186 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 46,021 psi | 71% | 3068 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,276 psi | 60% | 2917 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,650 psi | 83% | 3205 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,703 psi | 73% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 42,627 psi | 66% | 3012 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,411 psi | 68% | 3087 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,549 psi | 84% | 3232 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,895 psi | 80% | 3199 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,779 psi | 81% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,512 psi | 68% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,075 psi | 63% | 2913 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,747 psi | 73% | 3179 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,649 psi | 81% | 3107 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,302 psi | 84% | 3219 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,468 psi | 67% | 3031 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 32,387 psi | 50% | 2841 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 45,701 psi | 70% | 3100 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,345 psi | 82% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,574 psi | 76% | 3087 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,995 psi | 77% | 3097 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,437 psi | 64% | 2953 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 37,449 psi | 58% | 2907 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 96% | 45,034 psi | 69% | 3068 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,312 psi | 74% | 3084 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,883 psi | 57% | 2900 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 32,372 psi | 50% | 2831 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,869 psi | 57% | 2874 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 44,179 psi | 68% | 3100 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 29,747 psi | 46% | 2841 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,069 psi | 80% | 3205 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,921 psi | 75% | 3153 fps | 95.3% |
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 | 136gr | Geco ZERO. Alliant Reloder-26 delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,100 fps to 3,488 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 136.0 gr projectile in 0.308" calls for a 1:12.5 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-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 PRC with the .308 | 136gr | Geco ZERO they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Hodgdon H1000 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.