Load Specifications
Load data in caliber .300 PRC with .308 | 136gr | Peregrine VLR-4 bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 55,405 psi | 85% | 3176 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,638 psi | 89% | 3241 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,126 psi | 79% | 3196 fps | 98.3% |
| Accurate 4064 | <<locked>> | 86% | 55,854 psi | 86% | 3232 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,246 psi | 88% | 3337 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 55,201 psi | 85% | 3261 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,695 psi | 87% | 3271 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 54,984 psi | 85% | 3317 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,464 psi | 88% | 3264 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,144 psi | 86% | 3402 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,363 psi | 88% | 3297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,609 psi | 89% | 3317 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,972 psi | 89% | 3406 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,753 psi | 86% | 3373 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,754 psi | 89% | 3360 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,300 psi | 79% | 3287 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,240 psi | 74% | 3225 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,032 psi | 65% | 3114 fps | 96.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 3442 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,492 psi | 85% | 3278 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 58,160 psi | 89% | 3310 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,300 psi | 79% | 3287 fps | 96% |
| Bofors RP7 | <<locked>> | 92% | 57,740 psi | 89% | 3284 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,653 psi | 89% | 3294 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 58,769 psi | 90% | 3327 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,883 psi | 86% | 3330 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 90% | 55,782 psi | 86% | 3291 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 82% | 55,825 psi | 86% | 3274 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 58,436 psi | 90% | 3320 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,434 psi | 87% | 3314 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,695 psi | 87% | 3373 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 55% | 2087 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,101 psi | 88% | 3278 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,536 psi | 87% | 3261 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,985 psi | 86% | 3251 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,448 psi | 85% | 3228 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 58,769 psi | 90% | 3317 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,970 psi | 86% | 3261 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 57,754 psi | 89% | 3330 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,463 psi | 85% | 3294 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,464 psi | 88% | 3264 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,579 psi | 86% | 3235 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,696 psi | 89% | 3241 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,101 psi | 86% | 3245 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,738 psi | 86% | 3251 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 57,159 psi | 88% | 3294 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,250 psi | 65% | 3018 fps | 96.2% |
| Norma 201 | <<locked>> | 84% | 57,435 psi | 88% | 3261 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,305 psi | 90% | 3258 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,869 psi | 87% | 3304 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,159 psi | 86% | 3310 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 54,665 psi | 84% | 3386 fps | 98.1% |
| Norma URP | <<locked>> | 94% | 55,927 psi | 86% | 3323 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 58,044 psi | 89% | 3333 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 58,784 psi | 90% | 3383 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 58,015 psi | 89% | 3291 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,102 psi | 89% | 3310 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 56% | 2136 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,216 psi | 85% | 3248 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 58,813 psi | 90% | 3399 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,201 psi | 85% | 3369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,217 psi | 88% | 3360 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,202 psi | 86% | 3392 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 57,812 psi | 89% | 3238 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,986 psi | 89% | 3258 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,247 psi | 90% | 3304 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,971 psi | 88% | 3350 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 57,740 psi | 89% | 3284 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,738 psi | 86% | 3251 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,579 psi | 86% | 3235 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,101 psi | 86% | 3245 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,159 psi | 88% | 3294 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,492 psi | 87% | 3314 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,739 psi | 87% | 3268 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,493 psi | 88% | 3291 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 58,334 psi | 90% | 3192 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,927 psi | 86% | 3136 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,695 psi | 86% | 3199 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,478 psi | 87% | 3340 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 58,030 psi | 89% | 3186 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,449 psi | 87% | 3251 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,059 psi | 89% | 3297 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,955 psi | 85% | 3323 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,725 psi | 89% | 3320 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 55,347 psi | 85% | 3120 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 58,479 psi | 90% | 3222 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,390 psi | 85% | 3182 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,130 psi | 86% | 3219 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,305 psi | 90% | 3320 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,617 psi | 76% | 3156 fps | 96% |
| Vihtavuori N530 | <<locked>> | 82% | 58,117 psi | 89% | 3268 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,217 psi | 88% | 3228 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,276 psi | 88% | 3320 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,983 psi | 83% | 3317 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,436 psi | 90% | 3284 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,086 psi | 86% | 3333 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,395 psi | 67% | 3261 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,841 psi | 89% | 3301 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 3248 fps | 96.4% |
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% | 48,327 psi | 74% | 3061 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,021 psi | 72% | 3045 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 41,350 psi | 64% | 2999 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 45,759 psi | 70% | 3058 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,519 psi | 53% | 2861 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 51,764 psi | 80% | 3202 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 43,947 psi | 68% | 3028 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 51,198 psi | 79% | 3245 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,940 psi | 83% | 3205 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,428 psi | 75% | 3255 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,164 psi | 68% | 3054 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,268 psi | 73% | 3130 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,171 psi | 53% | 2877 fps | 95.3% |
| Alliant Reloder-17 | 72.3 gr | 80% | 38,798 psi | 60% | 3028 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 50,618 psi | 78% | 3232 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,747 psi | 73% | 3212 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,153 psi | 46% | 2769 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 39,349 psi | 61% | 3041 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 90% | 38,014 psi | 58% | 3054 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,866 psi | 80% | 3215 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 44,295 psi | 68% | 3061 fps | 99.6% |
| Bofors RP5 | <<locked>> | 98% | 47,747 psi | 73% | 3212 fps | 95% |
| Bofors RP7 | <<locked>> | 84% | 44,527 psi | 69% | 3028 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,867 psi | 83% | 3232 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,817 psi | 69% | 3068 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 84% | 42,366 psi | 65% | 3058 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 48,863 psi | 75% | 3159 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 52,344 psi | 81% | 3215 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,618 psi | 49% | 2762 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,081 psi | 76% | 3186 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,049 psi | 69% | 3143 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 41% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,183 psi | 77% | 3159 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 52,837 psi | 81% | 3202 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,195 psi | 71% | 3071 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,646 psi | 75% | 3100 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 45,498 psi | 70% | 3068 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,410 psi | 67% | 3009 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 35,868 psi | 55% | 2881 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 48,486 psi | 75% | 3163 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 53,940 psi | 83% | 3205 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,837 psi | 80% | 3176 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,850 psi | 78% | 3123 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 46,166 psi | 71% | 3068 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 37,971 psi | 58% | 2881 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 44,135 psi | 68% | 3045 fps | 95.9% |
| Lovex S071 | <<locked>> | 98% | 39,320 psi | 60% | 2953 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,401 psi | 78% | 3143 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,198 psi | 79% | 3146 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,601 psi | 72% | 3114 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 52,286 psi | 80% | 3238 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 43,947 psi | 68% | 3166 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 34,751 psi | 53% | 2867 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,021 psi | 72% | 3133 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 41,611 psi | 64% | 3045 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 54,157 psi | 83% | 3222 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,157 psi | 83% | 3245 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 42% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,063 psi | 69% | 3048 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,140 psi | 79% | 3264 fps | 99.6% |
| ReloadSwiss RS 60 | 72.3 gr | 80% | 41,336 psi | 64% | 3104 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,130 psi | 57% | 2946 fps | 95.8% |
| ReloadSwiss RS 70 | 77.1 gr | 84% | 39,131 psi | 60% | 3025 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 54,418 psi | 84% | 3186 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,906 psi | 74% | 3087 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 41,568 psi | 64% | 2995 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 96% | 49,690 psi | 76% | 3212 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 44,527 psi | 69% | 3028 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,971 psi | 58% | 2881 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,837 psi | 80% | 3176 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,166 psi | 71% | 3068 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,135 psi | 68% | 3045 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,975 psi | 66% | 3054 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,750 psi | 81% | 3196 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,444 psi | 78% | 3166 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,503 psi | 79% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,352 psi | 67% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 42,583 psi | 66% | 2943 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,240 psi | 76% | 3205 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 51,140 psi | 79% | 3077 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,721 psi | 81% | 3189 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 42,003 psi | 65% | 2995 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 31,082 psi | 48% | 2805 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 46,876 psi | 72% | 3120 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,069 psi | 80% | 3071 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,167 psi | 74% | 3061 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,617 psi | 75% | 3071 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,205 psi | 62% | 2923 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 36,085 psi | 56% | 2871 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 98% | 46,354 psi | 71% | 3091 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 54,418 psi | 84% | 3209 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,934 psi | 72% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,621 psi | 55% | 2867 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 33,185 psi | 51% | 2854 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,708 psi | 55% | 2844 fps | 98% |
| Winchester 760 | <<locked>> | 84% | 42,525 psi | 65% | 3061 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,618 psi | 47% | 2871 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,430 psi | 78% | 3173 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,386 psi | 78% | 3176 fps | 95.5% |
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 113 powders for .300 PRC loaded with the .308 | 136gr | Peregrine VLR-4. Alliant Reloder-26 delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,087 fps to 3,442 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 PRC with the .308 | 136gr | Peregrine VLR-4 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.