Load Specifications
Load data in caliber .300 PRC with .308 | 155gr | Berger BT 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% | 56,188 psi | 86% | 3054 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 55,680 psi | 86% | 3107 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 56,028 psi | 86% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,464 psi | 88% | 3163 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 58,015 psi | 89% | 3255 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 55,535 psi | 85% | 3074 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 58,262 psi | 90% | 3209 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 55,898 psi | 86% | 3199 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,695 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,710 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,928 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,535 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,479 psi | 88% | 3189 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,332 psi | 85% | 3196 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 3176 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,457 psi | 75% | 3100 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,782 psi | 87% | 3271 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 3173 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 57,667 psi | 89% | 3117 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,332 psi | 85% | 3196 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 56,811 psi | 87% | 3104 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 57,885 psi | 89% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,550 psi | 85% | 3153 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 58,479 psi | 90% | 3169 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 56,014 psi | 86% | 3136 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 58,697 psi | 90% | 3182 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 58,479 psi | 90% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,601 psi | 73% | 3143 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,014 psi | 86% | 3189 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 56% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,465 psi | 90% | 3110 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,363 psi | 88% | 3091 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 58,262 psi | 90% | 3143 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,363 psi | 90% | 3130 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 57,696 psi | 89% | 3150 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,175 psi | 89% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,305 psi | 88% | 3127 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,217 psi | 88% | 3235 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 55,347 psi | 85% | 3051 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,317 psi | 85% | 3074 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 56,739 psi | 87% | 3117 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,414 psi | 76% | 3002 fps | 99% |
| Norma 203B | <<locked>> | 82% | 56,028 psi | 86% | 3104 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,448 psi | 85% | 3133 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 55,172 psi | 85% | 3222 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 55,782 psi | 86% | 3140 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,203 psi | 88% | 3136 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,015 psi | 89% | 3255 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 58,450 psi | 90% | 3199 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,112 psi | 80% | 3117 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 57% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,783 psi | 89% | 3120 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,926 psi | 85% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,363 psi | 88% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,579 psi | 86% | 3209 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,906 psi | 74% | 3136 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,246 psi | 88% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,928 psi | 89% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,057 psi | 86% | 3114 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 56,898 psi | 88% | 3179 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 56,811 psi | 87% | 3104 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,317 psi | 85% | 3074 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 55,347 psi | 85% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,739 psi | 87% | 3117 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,709 psi | 86% | 3117 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,131 psi | 89% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,349 psi | 90% | 3077 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,420 psi | 87% | 3173 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 57,682 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,856 psi | 89% | 3104 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 55,738 psi | 86% | 3143 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,725 psi | 89% | 3153 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 57,812 psi | 89% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,972 psi | 89% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,434 psi | 85% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,914 psi | 89% | 3136 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,000 psi | 88% | 3123 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,173 psi | 86% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,855 psi | 87% | 3136 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 58,537 psi | 90% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,187 psi | 85% | 3209 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,696 psi | 89% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,753 psi | 86% | 3156 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,402 psi | 81% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,841 psi | 89% | 3146 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% | 52,591 psi | 81% | 2992 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 34,476 psi | 53% | 2677 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,533 psi | 81% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,640 psi | 63% | 2848 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 54,114 psi | 83% | 3186 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,168 psi | 76% | 2963 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,628 psi | 69% | 2949 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 48,805 psi | 75% | 3061 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,995 psi | 77% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,272 psi | 82% | 3064 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,175 psi | 60% | 2858 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,846 psi | 69% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,382 psi | 68% | 2943 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,034 psi | 69% | 2999 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,950 psi | 45% | 2589 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,041 psi | 54% | 2782 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 82% | 33,446 psi | 51% | 2776 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 44,411 psi | 68% | 2982 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 50,473 psi | 78% | 3002 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,034 psi | 69% | 2999 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 44,106 psi | 68% | 2864 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 50,778 psi | 78% | 3015 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,438 psi | 65% | 2897 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,136 psi | 69% | 2920 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 52,228 psi | 80% | 3071 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,227 psi | 79% | 3054 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,709 psi | 56% | 2740 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,640 psi | 64% | 2999 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,495 psi | 64% | 2907 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 42% | 1765 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,735 psi | 80% | 3002 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,940 psi | 83% | 3035 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 39,697 psi | 61% | 2782 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,571 psi | 70% | 2897 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 38,812 psi | 60% | 2795 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 54,650 psi | 84% | 3094 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,604 psi | 78% | 3005 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 49,893 psi | 77% | 3100 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,996 psi | 80% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,091 psi | 66% | 2841 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 41,278 psi | 64% | 2818 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 35,752 psi | 55% | 2710 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 52,605 psi | 81% | 3048 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,121 psi | 69% | 2936 fps | 95.5% |
| Norma MRP | 77.7 gr | 86% | 38,580 psi | 59% | 2877 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,074 psi | 62% | 2838 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,316 psi | 82% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,557 psi | 72% | 3041 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,957 psi | 60% | 2822 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 41,626 psi | 64% | 2907 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,691 psi | 78% | 2999 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,630 psi | 73% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,437 psi | 62% | 2864 fps | 98.3% |
| ReloadSwiss RS 70 | 73.8 gr | 80% | 39,001 psi | 60% | 2871 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,566 psi | 59% | 2907 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,751 psi | 83% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,543 psi | 73% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,168 psi | 76% | 2989 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 43,511 psi | 67% | 2923 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,106 psi | 68% | 2864 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,091 psi | 66% | 2841 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 51,996 psi | 80% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,278 psi | 64% | 2818 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,747 psi | 75% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,327 psi | 74% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,134 psi | 65% | 2782 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,120 psi | 66% | 2917 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,718 psi | 73% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,604 psi | 78% | 2979 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,724 psi | 56% | 2792 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,423 psi | 64% | 2844 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 54,172 psi | 83% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,273 psi | 83% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,527 psi | 70% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,553 psi | 64% | 2841 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 40,959 psi | 63% | 2825 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,634 psi | 81% | 2976 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,031 psi | 63% | 2838 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,155 psi | 49% | 2671 fps | 96.5% |
| Vihtavuori N560 | 85 gr | 94% | 51,503 psi | 79% | 3140 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,727 psi | 63% | 2805 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,612 psi | 66% | 2900 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,369 psi | 42% | 2621 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,685 psi | 67% | 2890 fps | 95.3% |
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 | 155gr | Berger BT Target. Alliant Reloder-26 delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,271 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 155.0 gr projectile in 0.308" calls for a 1:13.0 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 | 155gr | Berger BT 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.