Load Specifications
Load data in caliber .300 PRC with .308 | 150gr | Sierra SBT GameKing bullet and 88 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 ReloadSwiss RS 70.
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% | 58,044 psi | 89% | 3068 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,390 psi | 85% | 3084 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,479 psi | 90% | 3192 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 58,537 psi | 90% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,333 psi | 87% | 3189 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 58,334 psi | 90% | 3163 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,101 psi | 88% | 3232 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 3291 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 58,218 psi | 90% | 3297 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,695 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,869 psi | 86% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,840 psi | 87% | 3248 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,595 psi | 90% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,594 psi | 87% | 3219 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 3284 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,969 psi | 85% | 3209 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,601 psi | 73% | 3127 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,434 psi | 85% | 3297 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,069 psi | 82% | 3196 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 56,739 psi | 87% | 3150 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 3284 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 55,927 psi | 86% | 3133 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 84% | 57,000 psi | 88% | 3166 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 58,320 psi | 90% | 3241 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 57,740 psi | 89% | 3199 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,740 psi | 89% | 3209 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,377 psi | 88% | 3169 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,494 psi | 90% | 3205 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,673 psi | 72% | 3163 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 88% | 54,998 psi | 85% | 3215 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 56% | 2008 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,711 psi | 90% | 3166 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,711 psi | 89% | 3143 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,652 psi | 87% | 3123 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 57,290 psi | 88% | 3169 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,537 psi | 89% | 3163 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 56,681 psi | 87% | 3179 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,377 psi | 88% | 3186 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,318 psi | 87% | 3153 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,231 psi | 87% | 3258 fps | 96.9% |
| Lovex S060 | <<locked>> | 82% | 58,813 psi | 90% | 3127 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,928 psi | 89% | 3136 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,928 psi | 89% | 3159 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,825 psi | 86% | 3146 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,370 psi | 74% | 3025 fps | 98.6% |
| Norma 203B | <<locked>> | 84% | 58,784 psi | 90% | 3196 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,305 psi | 90% | 3225 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 57,812 psi | 89% | 3310 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 58,392 psi | 90% | 3225 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,072 psi | 86% | 3163 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,840 psi | 87% | 3278 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 57,305 psi | 88% | 3225 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,995 psi | 78% | 3140 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 57% | 2051 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,898 psi | 88% | 3150 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,798 psi | 89% | 3264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,231 psi | 87% | 3209 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,566 psi | 90% | 3304 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,891 psi | 72% | 3156 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 56,304 psi | 87% | 3097 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,014 psi | 88% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,726 psi | 90% | 3202 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 55,999 psi | 86% | 3205 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 55,927 psi | 86% | 3133 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,928 psi | 89% | 3159 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 57,928 psi | 89% | 3136 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,825 psi | 86% | 3146 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,523 psi | 90% | 3209 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,377 psi | 88% | 3022 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,479 psi | 88% | 3107 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,521 psi | 85% | 3199 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 56,579 psi | 87% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,000 psi | 88% | 3130 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 58,334 psi | 90% | 3232 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,608 psi | 87% | 3179 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 56,797 psi | 87% | 3054 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,000 psi | 88% | 3068 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,117 psi | 89% | 3114 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,898 psi | 88% | 3166 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,985 psi | 86% | 3150 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 55,187 psi | 85% | 3061 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,086 psi | 86% | 3169 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,522 psi | 88% | 3238 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,812 psi | 89% | 3297 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,579 psi | 87% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 58,523 psi | 90% | 3245 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,966 psi | 78% | 3274 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,855 psi | 87% | 3173 fps | 98% |
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% | 54,433 psi | 84% | 3015 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,880 psi | 80% | 3025 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 36,129 psi | 56% | 2759 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 51,590 psi | 79% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,711 psi | 61% | 2871 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,370 psi | 74% | 2992 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 46,775 psi | 72% | 3038 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 51,300 psi | 79% | 3153 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,259 psi | 83% | 3232 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,081 psi | 76% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,315 psi | 80% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,392 psi | 59% | 2881 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,019 psi | 68% | 3022 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 46,586 psi | 72% | 3028 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,266 psi | 68% | 3022 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,297 psi | 44% | 2602 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,345 psi | 53% | 2795 fps | 95.1% |
| Alliant Reloder-26 | 76.8 gr | 82% | 32,706 psi | 50% | 2789 fps | 95.2% |
| Bofors RP15 | <<locked>> | 96% | 46,586 psi | 72% | 3068 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,690 psi | 76% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,266 psi | 68% | 3022 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 43,526 psi | 67% | 2890 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 80% | 50,024 psi | 77% | 3045 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 41,713 psi | 64% | 2920 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 44,469 psi | 68% | 2946 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,824 psi | 83% | 3143 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,071 psi | 55% | 2766 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,708 psi | 84% | 3150 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,598 psi | 67% | 3087 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 40,698 psi | 63% | 2930 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 42% | 1798 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,984 psi | 85% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,836 psi | 78% | 3031 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,069 psi | 82% | 3061 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 41,626 psi | 64% | 2867 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,817 psi | 69% | 2920 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 38,130 psi | 59% | 2818 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 53,693 psi | 83% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,939 psi | 81% | 3091 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 49,052 psi | 75% | 3123 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 55,303 psi | 85% | 3071 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,111 psi | 79% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,337 psi | 65% | 2867 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 40,683 psi | 63% | 2848 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 37,318 psi | 57% | 2789 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 51,677 psi | 80% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 86% | 47,471 psi | 73% | 3025 fps | 95.8% |
| Norma MRP | 80.1 gr | 88% | 40,625 psi | 63% | 2969 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 39,421 psi | 61% | 2864 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 52,446 psi | 81% | 3104 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 49,139 psi | 76% | 3133 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,232 psi | 59% | 2844 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 43,859 psi | 67% | 2995 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 43% | 1841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,748 psi | 77% | 3025 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,746 psi | 72% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,653 psi | 61% | 2887 fps | 97.8% |
| ReloadSwiss RS 70 | 74.3 gr | 80% | 38,305 psi | 59% | 2894 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,683 psi | 63% | 3002 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 52,881 psi | 81% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,789 psi | 72% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,515 psi | 75% | 3015 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 45,803 psi | 70% | 3012 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 43,526 psi | 67% | 2890 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,337 psi | 65% | 2867 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 51,111 psi | 79% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,683 psi | 63% | 2848 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,950 psi | 74% | 3028 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,718 psi | 73% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,495 psi | 64% | 2805 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,397 psi | 70% | 3009 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,876 psi | 72% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,200 psi | 82% | 3068 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 35,955 psi | 55% | 2818 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 40,669 psi | 63% | 2867 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,447 psi | 82% | 3002 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,548 psi | 82% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,860 psi | 69% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,712 psi | 63% | 2864 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 42,815 psi | 66% | 2904 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,895 psi | 80% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,335 psi | 62% | 2864 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 31,502 psi | 48% | 2690 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 53,983 psi | 83% | 3228 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,885 psi | 61% | 2828 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 41,713 psi | 64% | 2920 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,818 psi | 41% | 2631 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,934 psi | 71% | 2976 fps | 95.6% |
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 96 powders for .300 PRC loaded with the .308 | 150gr | Sierra SBT GameKing. Norma MRP delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,310 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. Accurate 3100, ADI AR 2213, ADI AR 2217 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, ReloadSwiss RS 70 rank at the top here: for .300 PRC with the .308 | 150gr | Sierra SBT GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.