Load Specifications
Load data in caliber .300 PRC with .308 | 139gr | IBEX TRD bullet and 79 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 Alliant Reloder-16.
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 2700 | <<locked>> | 82% | 56,202 psi | 86% | 3179 fps | 97.9% |
| Accurate 3100 | <<locked>> | 98% | 55,709 psi | 86% | 3232 fps | 99.1% |
| Accurate 4064 | <<locked>> | 82% | 57,014 psi | 88% | 3192 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,348 psi | 88% | 3294 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 58,581 psi | 90% | 3258 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,319 psi | 88% | 3320 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 58,378 psi | 90% | 3396 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,579 psi | 87% | 3235 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,550 psi | 87% | 3255 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,101 psi | 88% | 3346 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,824 psi | 84% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,869 psi | 87% | 3307 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 58,276 psi | 90% | 3373 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,332 psi | 85% | 3304 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,327 psi | 74% | 3219 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,767 psi | 86% | 3392 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,606 psi | 82% | 3287 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 58,059 psi | 89% | 3261 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 58,276 psi | 90% | 3373 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 56,826 psi | 87% | 3232 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 57,972 psi | 89% | 3268 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 58,740 psi | 90% | 3337 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 57,928 psi | 89% | 3287 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,885 psi | 89% | 3268 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 55,303 psi | 85% | 3307 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 57% | 2080 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 58,160 psi | 89% | 3241 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,985 psi | 88% | 3215 fps | 98.6% |
| IMR 4350 | <<locked>> | 92% | 57,493 psi | 88% | 3258 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,943 psi | 89% | 3255 fps | 98.7% |
| IMR 4831 | <<locked>> | 92% | 57,493 psi | 88% | 3281 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 58,030 psi | 89% | 3287 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,463 psi | 87% | 3343 fps | 96% |
| Lovex S062 | <<locked>> | 82% | 55,593 psi | 86% | 3189 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 58,682 psi | 90% | 3258 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 56,811 psi | 87% | 3248 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,922 psi | 77% | 3130 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 55,941 psi | 86% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 92% | 58,537 psi | 90% | 3314 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 58,247 psi | 90% | 3409 fps | 98.9% |
| Norma URP | <<locked>> | 90% | 55,448 psi | 85% | 3268 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 82% | 56,652 psi | 87% | 3261 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,058 psi | 88% | 3363 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 92% | 57,740 psi | 89% | 3320 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,561 psi | 79% | 3225 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 58% | 2129 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,450 psi | 88% | 3241 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 58,001 psi | 89% | 3366 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,942 psi | 88% | 3310 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 58,726 psi | 90% | 3396 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,863 psi | 74% | 3245 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,580 psi | 89% | 3205 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 58,073 psi | 89% | 3255 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,550 psi | 85% | 3228 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 96% | 56,492 psi | 87% | 3297 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 88% | 56,826 psi | 87% | 3232 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 58,682 psi | 90% | 3258 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 55,593 psi | 86% | 3189 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,811 psi | 87% | 3248 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,448 psi | 85% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,841 psi | 89% | 3120 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,407 psi | 90% | 3202 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,999 psi | 86% | 3291 fps | 97.3% |
| Somchem S355 | <<locked>> | 86% | 57,624 psi | 89% | 3245 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 58,769 psi | 90% | 3333 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,363 psi | 88% | 3271 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 57,725 psi | 89% | 3159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,624 psi | 89% | 3169 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 58,755 psi | 90% | 3212 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,246 psi | 88% | 3261 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,463 psi | 87% | 3238 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,130 psi | 86% | 3166 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,710 psi | 87% | 3268 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 58,436 psi | 90% | 3343 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 58,204 psi | 90% | 3389 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,811 psi | 87% | 3219 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,361 psi | 85% | 3281 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,995 psi | 78% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,217 psi | 88% | 3258 fps | 97.4% |
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% | 52,649 psi | 81% | 3114 fps | 97.3% |
| Accurate 3100 | <<locked>> | 86% | 37,956 psi | 58% | 2871 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 53,766 psi | 83% | 3143 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,553 psi | 64% | 2986 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,008 psi | 75% | 3087 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 90% | 47,471 psi | 73% | 3127 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,404 psi | 84% | 3327 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,009 psi | 77% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,359 psi | 82% | 3202 fps | 99.9% |
| Alliant Reloder-16 | 68.2 gr | 80% | 39,305 psi | 60% | 2979 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,759 psi | 69% | 3120 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 47,181 psi | 73% | 3120 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 47,979 psi | 74% | 3179 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,008 psi | 46% | 2720 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 37,811 psi | 58% | 2959 fps | 95.6% |
| Alliant Reloder-26 | 79.1 gr | 84% | 36,709 psi | 56% | 2976 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 47,384 psi | 73% | 3166 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,082 psi | 79% | 3143 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 47,979 psi | 74% | 3179 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,657 psi | 69% | 2989 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,039 psi | 79% | 3146 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 42,670 psi | 66% | 3022 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 48,138 psi | 74% | 3104 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,260 psi | 57% | 2871 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 44,614 psi | 69% | 3094 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 42% | 1864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,561 psi | 79% | 3127 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,751 psi | 83% | 3156 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 45,266 psi | 70% | 3022 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,527 psi | 70% | 3015 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 39,523 psi | 61% | 2927 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 54,679 psi | 84% | 3232 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 52,866 psi | 81% | 3278 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 52,359 psi | 81% | 3133 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,758 psi | 67% | 2972 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 42,032 psi | 65% | 2949 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 39,247 psi | 60% | 2904 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,750 psi | 81% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 86% | 48,182 psi | 74% | 3120 fps | 95.1% |
| Norma MRP | 82.3 gr | 90% | 44,512 psi | 68% | 3136 fps | 96% |
| Norma URP | <<locked>> | 80% | 40,538 psi | 62% | 2966 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 52,982 psi | 82% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,272 psi | 82% | 3291 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,421 psi | 61% | 2946 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 44,947 psi | 69% | 3087 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 43% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,734 psi | 78% | 3120 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,326 psi | 73% | 3182 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,901 psi | 63% | 2992 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,262 psi | 60% | 2989 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 44,686 psi | 69% | 3169 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,273 psi | 83% | 3150 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,182 psi | 74% | 3084 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 52,098 psi | 80% | 3166 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 46,514 psi | 72% | 3104 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,657 psi | 69% | 2989 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,758 psi | 67% | 2972 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 52,359 psi | 81% | 3133 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,032 psi | 65% | 2949 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,863 psi | 75% | 3133 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,515 psi | 75% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,801 psi | 66% | 2904 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 49,226 psi | 76% | 3163 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,240 psi | 74% | 3081 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 37,202 psi | 57% | 2927 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 44,643 psi | 69% | 3028 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 54,447 psi | 84% | 3110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,244 psi | 83% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,977 psi | 71% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,901 psi | 64% | 2966 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 46,572 psi | 72% | 3054 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,707 psi | 81% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,553 psi | 64% | 2969 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 33,243 psi | 51% | 2808 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 54,331 psi | 84% | 3320 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,872 psi | 63% | 2927 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 42,859 psi | 66% | 3025 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 28,631 psi | 44% | 2753 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 94% | 49,995 psi | 77% | 3130 fps | 95.8% |
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 79 powders for .300 PRC loaded with the .308 | 139gr | IBEX TRD. Norma MRP delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,409 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, Alliant Reloder-25 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, Alliant Reloder-16 rank at the top here: for .300 PRC with the .308 | 139gr | IBEX TRD they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.