Load Specifications
Load data in caliber .300 PRC with .308 | 155.5gr | Warner Tool Co. Flat Line bullet and 90 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% | 57,972 psi | 89% | 3012 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,798 psi | 90% | 3087 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 3136 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 58,305 psi | 90% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,854 psi | 86% | 3127 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,362 psi | 87% | 3219 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,972 psi | 89% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,898 psi | 88% | 3176 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,392 psi | 90% | 3232 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 58,030 psi | 89% | 3238 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,535 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,709 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,565 psi | 87% | 3189 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,175 psi | 89% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,188 psi | 86% | 3159 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,580 psi | 89% | 3225 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,636 psi | 84% | 3150 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,166 psi | 73% | 3068 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,868 psi | 84% | 3238 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,823 psi | 81% | 3140 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 56,449 psi | 87% | 3091 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,580 psi | 89% | 3225 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 55,782 psi | 86% | 3077 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 56,739 psi | 87% | 3107 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,943 psi | 89% | 3182 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 57,464 psi | 88% | 3140 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 98% | 58,436 psi | 90% | 3169 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,261 psi | 88% | 3150 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,913 psi | 88% | 3107 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,262 psi | 90% | 3146 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,340 psi | 71% | 3104 fps | 96.8% |
| Hodgdon Superformance | <<locked>> | 90% | 58,726 psi | 90% | 3225 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 56% | 1962 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,320 psi | 90% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,522 psi | 88% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,304 psi | 87% | 3064 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 56,927 psi | 88% | 3110 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,406 psi | 88% | 3107 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 56,275 psi | 87% | 3120 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,174 psi | 88% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,159 psi | 86% | 3097 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,825 psi | 86% | 3199 fps | 97% |
| Lovex S060 | <<locked>> | 82% | 58,769 psi | 90% | 3068 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,682 psi | 89% | 3077 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,595 psi | 89% | 3100 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,550 psi | 85% | 3091 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,109 psi | 74% | 2969 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 58,668 psi | 90% | 3136 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,059 psi | 89% | 3169 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 57,406 psi | 88% | 3251 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 58,204 psi | 90% | 3173 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,898 psi | 86% | 3107 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,347 psi | 87% | 3219 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 57,087 psi | 88% | 3169 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,604 psi | 78% | 3084 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 57% | 2008 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,550 psi | 87% | 3091 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,508 psi | 88% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,927 psi | 86% | 3150 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,262 psi | 90% | 3241 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,456 psi | 71% | 3100 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 56,202 psi | 86% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,753 psi | 87% | 3091 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,508 psi | 90% | 3143 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 55,550 psi | 85% | 3146 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 55,782 psi | 86% | 3077 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,595 psi | 89% | 3100 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 57,682 psi | 89% | 3077 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,550 psi | 85% | 3091 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,247 psi | 90% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,159 psi | 88% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,276 psi | 88% | 3051 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,085 psi | 85% | 3140 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 56,521 psi | 87% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,623 psi | 87% | 3074 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 57,972 psi | 89% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,202 psi | 86% | 3120 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 56,608 psi | 87% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,768 psi | 87% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,769 psi | 89% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,463 psi | 87% | 3104 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,622 psi | 86% | 3094 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 84% | 58,653 psi | 90% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,709 psi | 86% | 3110 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,058 psi | 88% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,508 psi | 88% | 3241 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,231 psi | 87% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 58,160 psi | 89% | 3189 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,546 psi | 78% | 3219 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,420 psi | 87% | 3114 fps | 98.1% |
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% | 54,230 psi | 83% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,605 psi | 79% | 2966 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 35,969 psi | 55% | 2713 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,430 psi | 79% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,624 psi | 61% | 2822 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 96% | 52,475 psi | 81% | 3150 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,225 psi | 74% | 2936 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 43,540 psi | 67% | 2917 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 50,995 psi | 78% | 3097 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,998 psi | 83% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,979 psi | 75% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,272 psi | 80% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,261 psi | 59% | 2828 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,743 psi | 67% | 2966 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,279 psi | 67% | 2910 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,976 psi | 68% | 2966 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,195 psi | 43% | 2559 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,127 psi | 53% | 2749 fps | 95.3% |
| Alliant Reloder-26 | 74.6 gr | 82% | 32,605 psi | 50% | 2746 fps | 95.5% |
| Bofors RP15 | <<locked>> | 94% | 43,366 psi | 67% | 2953 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,429 psi | 76% | 2976 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,976 psi | 68% | 2966 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,221 psi | 66% | 2835 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 49,647 psi | 76% | 2986 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 41,408 psi | 64% | 2867 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,266 psi | 68% | 2890 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 94% | 51,010 psi | 78% | 3038 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,505 psi | 82% | 3087 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,911 psi | 55% | 2717 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,375 psi | 84% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 43,366 psi | 67% | 3035 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,451 psi | 62% | 2874 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 42% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,882 psi | 84% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,691 psi | 78% | 2976 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,837 psi | 81% | 3005 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 41,466 psi | 64% | 2815 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,715 psi | 69% | 2871 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 37,898 psi | 58% | 2766 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 53,592 psi | 82% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,707 psi | 81% | 3035 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 48,762 psi | 75% | 3068 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 55,158 psi | 85% | 3015 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,952 psi | 78% | 2969 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,235 psi | 65% | 2815 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 40,408 psi | 62% | 2792 fps | 96.2% |
| Lovex S071 | <<locked>> | 90% | 34,824 psi | 54% | 2684 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,605 psi | 79% | 3025 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,193 psi | 68% | 2910 fps | 95.1% |
| Norma MRP | 77.7 gr | 88% | 40,335 psi | 62% | 2917 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,131 psi | 60% | 2812 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 52,199 psi | 80% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,718 psi | 75% | 3077 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,101 psi | 59% | 2795 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 94% | 40,451 psi | 62% | 2871 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 43% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,647 psi | 76% | 2969 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,441 psi | 71% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,378 psi | 61% | 2835 fps | 97.9% |
| ReloadSwiss RS 70 | 72.1 gr | 80% | 38,116 psi | 59% | 2841 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,306 psi | 62% | 2949 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,692 psi | 81% | 2982 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,514 psi | 72% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,254 psi | 74% | 2963 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 42,525 psi | 65% | 2897 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,221 psi | 66% | 2835 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,235 psi | 65% | 2815 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 50,952 psi | 78% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,408 psi | 62% | 2792 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,790 psi | 74% | 2976 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,471 psi | 73% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,292 psi | 64% | 2756 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 45,150 psi | 69% | 2956 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,702 psi | 72% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,968 psi | 81% | 3012 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 35,723 psi | 55% | 2766 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 40,350 psi | 62% | 2815 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 53,171 psi | 82% | 2943 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,243 psi | 82% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,585 psi | 69% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,654 psi | 63% | 2815 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 42,540 psi | 65% | 2851 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,517 psi | 79% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,001 psi | 62% | 2812 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,357 psi | 48% | 2644 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 94% | 50,096 psi | 77% | 3104 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,682 psi | 61% | 2776 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 41,582 psi | 64% | 2871 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,687 psi | 41% | 2589 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,658 psi | 70% | 2920 fps | 95.7% |
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 | 155.5gr | Warner Tool Co. Flat Line. Norma MRP delivers the highest muzzle velocity at 3,251 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,251 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 155.5 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. 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 | 155.5gr | Warner Tool Co. Flat Line 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.