Load Specifications
Load data in caliber .300 PRC with .308 | 155gr | SUS-TAC HP bullet and 86 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% | 56,478 psi | 87% | 3061 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 55,985 psi | 86% | 3114 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 56,101 psi | 86% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,551 psi | 89% | 3163 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 58,276 psi | 90% | 3258 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 55,854 psi | 86% | 3077 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 58,494 psi | 90% | 3212 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 56,159 psi | 86% | 3202 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,840 psi | 87% | 3104 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,014 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 58,247 psi | 90% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,854 psi | 86% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,754 psi | 89% | 3196 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,608 psi | 86% | 3199 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,333 psi | 87% | 3179 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,704 psi | 75% | 3104 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,029 psi | 88% | 3274 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,563 psi | 84% | 3179 fps | 98% |
| Bofors RP3 | <<locked>> | 84% | 57,957 psi | 89% | 3120 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,608 psi | 86% | 3199 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 57,087 psi | 88% | 3107 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,124 psi | 74% | 3038 fps | 96% |
| Hodgdon H380 | <<locked>> | 84% | 58,175 psi | 89% | 3140 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,811 psi | 86% | 3156 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 58,740 psi | 90% | 3173 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 56,289 psi | 87% | 3143 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,998 psi | 85% | 3123 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 58,537 psi | 90% | 3140 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,776 psi | 74% | 3146 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,318 psi | 87% | 3192 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 56% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,798 psi | 90% | 3117 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,638 psi | 89% | 3097 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 58,291 psi | 90% | 3143 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,653 psi | 90% | 3136 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 57,812 psi | 89% | 3150 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,523 psi | 90% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,566 psi | 89% | 3130 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,493 psi | 88% | 3241 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 55,477 psi | 85% | 3051 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,390 psi | 85% | 3074 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 57,000 psi | 88% | 3120 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,719 psi | 76% | 3005 fps | 99% |
| Norma 203B | <<locked>> | 82% | 56,318 psi | 87% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,753 psi | 86% | 3140 fps | 98% |
| Norma MRP | <<locked>> | 96% | 55,245 psi | 85% | 3225 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 56,057 psi | 86% | 3146 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,276 psi | 88% | 3136 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,291 psi | 90% | 3261 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 58,711 psi | 90% | 3205 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,359 psi | 81% | 3120 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 57% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,841 psi | 89% | 3120 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,274 psi | 85% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,479 psi | 88% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,883 psi | 86% | 3212 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,109 psi | 74% | 3143 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 57,363 psi | 88% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 58,044 psi | 89% | 3117 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,115 psi | 86% | 3114 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 57,203 psi | 88% | 3182 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 57,087 psi | 88% | 3107 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,390 psi | 85% | 3074 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 55,477 psi | 85% | 3051 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,000 psi | 88% | 3120 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,028 psi | 86% | 3123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,436 psi | 90% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,682 psi | 90% | 3081 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,739 psi | 87% | 3179 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 57,769 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 58,088 psi | 89% | 3107 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 55,840 psi | 86% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,769 psi | 89% | 3153 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 57,914 psi | 89% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,073 psi | 89% | 3038 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,535 psi | 85% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 58,001 psi | 89% | 3140 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,261 psi | 88% | 3130 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,246 psi | 87% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,159 psi | 88% | 3140 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,158 psi | 85% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,245 psi | 85% | 3209 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,914 psi | 89% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,811 psi | 86% | 3156 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,750 psi | 81% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 58,117 psi | 89% | 3153 fps | 98.5% |
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% | 52,692 psi | 81% | 2995 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 34,592 psi | 53% | 2680 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,678 psi | 81% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,770 psi | 63% | 2851 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 54,375 psi | 84% | 3192 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,240 psi | 76% | 2966 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,860 psi | 69% | 2956 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 49,008 psi | 75% | 3068 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,096 psi | 77% | 2992 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,359 psi | 82% | 3064 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,262 psi | 60% | 2861 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,962 psi | 69% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,614 psi | 69% | 2946 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,424 psi | 65% | 2940 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,008 psi | 45% | 2592 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,201 psi | 54% | 2785 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 82% | 33,678 psi | 52% | 2782 fps | 96.1% |
| Bofors RP15 | <<locked>> | 94% | 44,686 psi | 69% | 2986 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,778 psi | 78% | 3005 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,424 psi | 65% | 2940 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,222 psi | 68% | 2864 fps | 96.6% |
| Hodgdon H1000 | <<locked>> | 98% | 45,034 psi | 69% | 2972 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 50,865 psi | 78% | 3018 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,554 psi | 65% | 2900 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,382 psi | 70% | 2927 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 52,475 psi | 81% | 3074 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,474 psi | 79% | 3058 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,970 psi | 57% | 2746 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,872 psi | 64% | 3005 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,742 psi | 64% | 2910 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 42% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,822 psi | 80% | 3002 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,012 psi | 83% | 3035 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 39,769 psi | 61% | 2785 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,687 psi | 70% | 2900 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 39,059 psi | 60% | 2799 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 54,737 psi | 84% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,662 psi | 78% | 3009 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 50,154 psi | 77% | 3107 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,083 psi | 80% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,207 psi | 66% | 2844 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 41,524 psi | 64% | 2825 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 35,984 psi | 55% | 2717 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,750 psi | 81% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,397 psi | 70% | 2943 fps | 95.6% |
| Norma MRP | 78 gr | 86% | 38,827 psi | 60% | 2884 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,335 psi | 62% | 2844 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,635 psi | 83% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,789 psi | 72% | 3048 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,175 psi | 60% | 2828 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 41,814 psi | 64% | 2910 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 43% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,749 psi | 78% | 2999 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,718 psi | 73% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,553 psi | 62% | 2867 fps | 98.3% |
| ReloadSwiss RS 70 | 74.1 gr | 80% | 39,233 psi | 60% | 2877 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,769 psi | 60% | 2913 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 53,867 psi | 83% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,834 psi | 74% | 2949 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,414 psi | 76% | 2992 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 43,758 psi | 67% | 2930 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,222 psi | 68% | 2864 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,207 psi | 66% | 2844 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 52,083 psi | 80% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,524 psi | 64% | 2825 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,037 psi | 75% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,414 psi | 74% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,351 psi | 65% | 2785 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,366 psi | 67% | 2923 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,805 psi | 74% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,821 psi | 78% | 2982 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 36,811 psi | 57% | 2795 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 41,510 psi | 64% | 2848 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 54,302 psi | 84% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,563 psi | 84% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,803 psi | 70% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,684 psi | 64% | 2844 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 90% | 41,002 psi | 63% | 2825 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,721 psi | 81% | 2976 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,118 psi | 63% | 2841 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,372 psi | 50% | 2677 fps | 96.6% |
| Vihtavuori N560 | 85.2 gr | 94% | 51,576 psi | 79% | 3140 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,785 psi | 63% | 2808 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,685 psi | 66% | 2904 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,744 psi | 40% | 2552 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,903 psi | 68% | 2894 fps | 95.4% |
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 | SUS-TAC HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,274 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,274 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 53–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:11.5 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 | 155gr | SUS-TAC HP 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.