Load Specifications
Load data in caliber .300 PRC with .308 | 155.5gr | Berger Fullbore Target bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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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 2700 | <<locked>> | 82% | 56,043 psi | 86% | 3048 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 55,361 psi | 85% | 3097 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 55,782 psi | 86% | 3035 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,087 psi | 88% | 3150 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,769 psi | 89% | 3248 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 55,347 psi | 85% | 3064 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,899 psi | 89% | 3196 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 55,593 psi | 86% | 3186 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,550 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,507 psi | 87% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,783 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,376 psi | 85% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,392 psi | 88% | 3182 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,042 psi | 85% | 3186 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 3173 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,428 psi | 75% | 3097 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,463 psi | 87% | 3264 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,998 psi | 83% | 3163 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 57,493 psi | 88% | 3107 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,042 psi | 85% | 3186 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 56,652 psi | 87% | 3094 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 57,725 psi | 89% | 3127 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,376 psi | 85% | 3143 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 58,363 psi | 90% | 3163 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 55,753 psi | 86% | 3127 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 58,436 psi | 90% | 3173 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 58,088 psi | 89% | 3127 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,340 psi | 73% | 3133 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 55,709 psi | 86% | 3179 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 56% | 1969 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,320 psi | 90% | 3100 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,188 psi | 88% | 3084 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 57,914 psi | 89% | 3130 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,233 psi | 90% | 3123 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 57,377 psi | 88% | 3136 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,030 psi | 89% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,000 psi | 88% | 3114 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,985 psi | 88% | 3225 fps | 97.4% |
| Lovex S062 | <<locked>> | 84% | 58,711 psi | 90% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 58,450 psi | 90% | 3117 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,565 psi | 87% | 3110 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,342 psi | 76% | 2995 fps | 99% |
| Norma 203B | <<locked>> | 82% | 55,840 psi | 86% | 3097 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,376 psi | 85% | 3127 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 54,839 psi | 84% | 3212 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 55,651 psi | 86% | 3133 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,855 psi | 87% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,725 psi | 89% | 3248 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 58,146 psi | 89% | 3189 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,880 psi | 80% | 3107 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 57% | 2014 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,595 psi | 89% | 3110 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,737 psi | 84% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,043 psi | 88% | 3169 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,463 psi | 85% | 3202 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,718 psi | 73% | 3130 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,043 psi | 88% | 3054 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,754 psi | 89% | 3107 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,753 psi | 86% | 3104 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 56,811 psi | 87% | 3169 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 56,652 psi | 87% | 3094 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 58,450 psi | 90% | 3117 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 58,711 psi | 90% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,565 psi | 87% | 3110 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,564 psi | 85% | 3110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,175 psi | 89% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,291 psi | 90% | 3071 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,347 psi | 87% | 3166 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 57,508 psi | 88% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,841 psi | 89% | 3100 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 55,361 psi | 85% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,392 psi | 88% | 3143 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 57,551 psi | 89% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,798 psi | 89% | 3025 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,274 psi | 85% | 3018 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,551 psi | 89% | 3123 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,724 psi | 87% | 3114 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 55,999 psi | 86% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,768 psi | 87% | 3130 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 58,450 psi | 90% | 3199 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,940 psi | 85% | 3199 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,363 psi | 88% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,593 psi | 86% | 3146 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,025 psi | 80% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,537 psi | 89% | 3136 fps | 98.4% |
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 2700 | <<locked>> | 80% | 52,431 psi | 81% | 2986 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 34,330 psi | 53% | 2671 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,330 psi | 81% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,422 psi | 62% | 2838 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 96% | 53,824 psi | 83% | 3176 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,994 psi | 75% | 2956 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,483 psi | 68% | 2943 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 48,515 psi | 75% | 3051 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,792 psi | 77% | 2982 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,055 psi | 82% | 3054 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,001 psi | 60% | 2848 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,715 psi | 69% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,222 psi | 68% | 2933 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 44,904 psi | 69% | 2989 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,805 psi | 44% | 2579 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 34,911 psi | 54% | 2772 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 82% | 33,315 psi | 51% | 2766 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 44,280 psi | 68% | 2976 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,488 psi | 78% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 44,904 psi | 69% | 2989 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 43,961 psi | 68% | 2854 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,604 psi | 78% | 3009 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,264 psi | 65% | 2887 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,136 psi | 69% | 2913 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 52,156 psi | 80% | 3064 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,952 psi | 78% | 3041 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,666 psi | 56% | 2733 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,394 psi | 64% | 2986 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 41,365 psi | 64% | 2900 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 42% | 1762 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,503 psi | 79% | 2992 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,766 psi | 83% | 3025 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 39,523 psi | 61% | 2772 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,426 psi | 70% | 2887 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 38,783 psi | 60% | 2789 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 54,433 psi | 84% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,328 psi | 77% | 2995 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 49,806 psi | 77% | 3091 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,793 psi | 80% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,931 psi | 66% | 2835 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 41,263 psi | 63% | 2815 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 35,621 psi | 55% | 2703 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,402 psi | 81% | 3041 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,976 psi | 69% | 2930 fps | 95.4% |
| Norma MRP | 77.3 gr | 86% | 38,450 psi | 59% | 2871 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,059 psi | 62% | 2835 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,156 psi | 82% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,499 psi | 72% | 3035 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,914 psi | 60% | 2818 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 41,539 psi | 64% | 2897 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 43% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,531 psi | 78% | 2989 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,456 psi | 73% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,277 psi | 62% | 2858 fps | 98.2% |
| ReloadSwiss RS 70 | 73.4 gr | 80% | 38,870 psi | 60% | 2864 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,406 psi | 59% | 2897 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 53,534 psi | 82% | 3002 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,529 psi | 73% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,066 psi | 75% | 2982 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 43,381 psi | 67% | 2917 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,961 psi | 68% | 2854 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,931 psi | 66% | 2835 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 51,793 psi | 80% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,263 psi | 63% | 2815 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,762 psi | 75% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,298 psi | 74% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,134 psi | 65% | 2776 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,989 psi | 66% | 2910 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,500 psi | 73% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,546 psi | 78% | 2972 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,521 psi | 56% | 2782 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,307 psi | 64% | 2838 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 54,157 psi | 83% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,259 psi | 83% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,513 psi | 70% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,408 psi | 64% | 2831 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 40,683 psi | 63% | 2815 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,446 psi | 81% | 2966 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,872 psi | 63% | 2831 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,097 psi | 49% | 2664 fps | 96.5% |
| Vihtavuori N560 | 84.5 gr | 94% | 51,213 psi | 79% | 3130 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,611 psi | 62% | 2799 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,453 psi | 65% | 2894 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,267 psi | 42% | 2615 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,555 psi | 67% | 2881 fps | 95.2% |
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 94 powders for .300 PRC loaded with the .308 | 155.5gr | Berger Fullbore Target. Alliant Reloder-26 delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,264 fps. ADI AR 2217 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 155.5 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for .300 PRC with the .308 | 155.5gr | Berger Fullbore Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.