Load Specifications
Load data in caliber .300 PRC with .308 | 150gr | Fox Classic Hunter bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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.
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>> | 82% | 55,448 psi | 85% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,261 psi | 88% | 3114 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,666 psi | 86% | 3153 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 56,057 psi | 86% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,783 psi | 89% | 3215 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 57,450 psi | 88% | 3307 fps | 97.2% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,479 psi | 90% | 3304 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 56,463 psi | 87% | 3136 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,056 psi | 85% | 3196 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,782 psi | 87% | 3255 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,333 psi | 87% | 3264 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,288 psi | 85% | 3192 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,392 psi | 88% | 3159 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,595 psi | 89% | 3182 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,668 psi | 90% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,202 psi | 86% | 3241 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,218 psi | 90% | 3245 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,782 psi | 86% | 3245 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,634 psi | 81% | 3173 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,585 psi | 70% | 3084 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,942 psi | 88% | 3323 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,908 psi | 78% | 3156 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 58,320 psi | 90% | 3176 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,782 psi | 86% | 3245 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 57,624 psi | 89% | 3159 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 58,769 psi | 90% | 3196 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,304 psi | 87% | 3209 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 55,695 psi | 86% | 3163 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 56,855 psi | 87% | 3192 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,042 psi | 85% | 3133 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,434 psi | 87% | 3176 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,811 psi | 87% | 3248 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 56% | 2001 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,797 psi | 87% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,956 psi | 86% | 3120 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 58,639 psi | 90% | 3156 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 55,274 psi | 85% | 3133 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,796 psi | 86% | 3133 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 58,015 psi | 89% | 3202 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,434 psi | 85% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,276 psi | 90% | 3182 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,954 psi | 83% | 3215 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 57,188 psi | 88% | 3100 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,941 psi | 86% | 3107 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,912 psi | 86% | 3127 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 57,305 psi | 88% | 3169 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,079 psi | 71% | 2982 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 57,116 psi | 88% | 3117 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,044 psi | 89% | 3117 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,884 psi | 88% | 3166 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,231 psi | 87% | 3189 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 55,477 psi | 85% | 3274 fps | 99% |
| Norma URP | <<locked>> | 92% | 56,304 psi | 87% | 3196 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,088 psi | 89% | 3196 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,476 psi | 84% | 3235 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,143 psi | 85% | 3192 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,704 psi | 75% | 3094 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 57% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,784 psi | 90% | 3179 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,637 psi | 86% | 3235 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,754 psi | 89% | 3232 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,376 psi | 87% | 3268 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,759 psi | 69% | 3104 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 57,914 psi | 89% | 3123 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,436 psi | 90% | 3169 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,724 psi | 87% | 3166 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 57,537 psi | 89% | 3232 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 57,624 psi | 89% | 3159 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,912 psi | 86% | 3127 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 55,941 psi | 86% | 3107 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,305 psi | 88% | 3169 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,565 psi | 87% | 3179 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,406 psi | 88% | 3153 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,914 psi | 89% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,724 psi | 86% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,506 psi | 85% | 3074 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,058 psi | 88% | 3225 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 57,595 psi | 89% | 3041 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,305 psi | 90% | 3166 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,811 psi | 86% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,044 psi | 89% | 3202 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 58,494 psi | 90% | 3025 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,508 psi | 90% | 3077 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,187 psi | 85% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,101 psi | 86% | 3084 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,624 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,708 psi | 83% | 3114 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 56,898 psi | 88% | 3087 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,653 psi | 89% | 3192 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,552 psi | 90% | 3255 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,680 psi | 86% | 3261 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,697 psi | 90% | 3156 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,304 psi | 87% | 3209 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,066 psi | 74% | 3228 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,653 psi | 89% | 3163 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,682 psi | 90% | 3202 fps | 98.2% |
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% | 51,779 psi | 80% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,980 psi | 77% | 2989 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 36,434 psi | 56% | 2769 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,110 psi | 76% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,594 psi | 58% | 2822 fps | 97.4% |
| Accurate High Country | <<locked>> | 94% | 49,676 psi | 76% | 3163 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 98% | 54,404 psi | 84% | 3235 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 46,731 psi | 72% | 2963 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 45,005 psi | 69% | 2999 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 52,794 psi | 81% | 3179 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,199 psi | 80% | 3196 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 45,136 psi | 69% | 2995 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,239 psi | 73% | 2986 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,430 psi | 78% | 3061 fps | 99.9% |
| Alliant Reloder-16 | 66.9 gr | 80% | 36,738 psi | 57% | 2838 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,018 psi | 65% | 2982 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,614 psi | 69% | 2989 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,107 psi | 69% | 3041 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,572 psi | 44% | 2612 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,867 psi | 54% | 2812 fps | 95.2% |
| Alliant Reloder-26 | 77.6 gr | 84% | 33,272 psi | 51% | 2808 fps | 95.4% |
| Bofors RP15 | <<locked>> | 96% | 44,469 psi | 68% | 3022 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 47,601 psi | 73% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,107 psi | 69% | 3041 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,771 psi | 64% | 2854 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,921 psi | 74% | 3009 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,784 psi | 61% | 2877 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 45,716 psi | 70% | 2972 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 52,881 psi | 81% | 3123 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,258 psi | 53% | 2723 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,649 psi | 81% | 3117 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,945 psi | 65% | 2956 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,258 psi | 82% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,110 psi | 76% | 3002 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,474 psi | 79% | 3031 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 42,757 psi | 66% | 2894 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,265 psi | 67% | 2887 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 36,245 psi | 56% | 2776 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 51,779 psi | 80% | 3094 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,447 psi | 84% | 3117 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 98% | 50,401 psi | 78% | 3146 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 53,896 psi | 83% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,342 psi | 76% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,553 psi | 62% | 2828 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 38,856 psi | 60% | 2802 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 37,637 psi | 58% | 2799 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 53,548 psi | 82% | 3064 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,433 psi | 84% | 3064 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,777 psi | 77% | 3045 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,643 psi | 70% | 2989 fps | 95.1% |
| Norma MRP | 80.7 gr | 90% | 41,452 psi | 64% | 2989 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 37,594 psi | 58% | 2822 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,459 psi | 78% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 50,531 psi | 78% | 3159 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,521 psi | 56% | 2802 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 96% | 41,872 psi | 64% | 2949 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 42% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,037 psi | 74% | 2992 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,686 psi | 69% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,565 psi | 58% | 2841 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,521 psi | 56% | 2848 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,481 psi | 64% | 3022 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 51,082 psi | 79% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,701 psi | 69% | 2936 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,734 psi | 77% | 3038 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 43,642 psi | 67% | 2966 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,771 psi | 64% | 2854 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,553 psi | 62% | 2828 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,342 psi | 76% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,856 psi | 60% | 2802 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,180 psi | 71% | 2995 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,693 psi | 83% | 3094 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,418 psi | 84% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,035 psi | 71% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,827 psi | 61% | 2769 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,499 psi | 72% | 3028 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 54,085 psi | 83% | 2989 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,947 psi | 69% | 2936 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,040 psi | 52% | 2772 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 41,365 psi | 64% | 2887 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 55,042 psi | 85% | 2979 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,401 psi | 79% | 2976 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,735 psi | 80% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,062 psi | 66% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,943 psi | 60% | 2825 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 43,859 psi | 67% | 2927 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,937 psi | 77% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,406 psi | 59% | 2822 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 31,691 psi | 49% | 2700 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 51,822 psi | 80% | 3189 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,319 psi | 59% | 2795 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,958 psi | 61% | 2881 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,963 psi | 41% | 2638 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,853 psi | 83% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,239 psi | 73% | 2999 fps | 95.8% |
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 96 powders for .300 PRC loaded with the .308 | 150gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,323 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.0 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-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 PRC with the .308 | 150gr | Fox Classic Hunter they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.