Load Specifications
Bullet:.308 | 150gr | RWS TMR
Bullet Manufacturer:RWS
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 PRC load data
Case Length (l3):2.58"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:99 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:6.0
Load data in caliber .300 PRC with .308 | 150gr | RWS TMR bullet and 84 powders. The key underlying parameters are shown in the table above.
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% | 56,507 psi | 87% | 3107 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 56,144 psi | 86% | 3159 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 56,449 psi | 87% | 3100 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,928 psi | 89% | 3215 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,869 psi | 86% | 3127 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 58,784 psi | 90% | 3261 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,507 psi | 87% | 3258 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,043 psi | 88% | 3153 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,058 psi | 88% | 3176 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 58,421 psi | 90% | 3274 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,217 psi | 86% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 58,247 psi | 90% | 3248 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,985 psi | 86% | 3251 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,782 psi | 87% | 3235 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,023 psi | 75% | 3156 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,595 psi | 89% | 3330 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,940 psi | 85% | 3228 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 58,305 psi | 90% | 3176 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,985 psi | 86% | 3251 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 57,319 psi | 88% | 3159 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 58,479 psi | 90% | 3192 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,130 psi | 86% | 3209 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 55,463 psi | 85% | 3166 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 96% | 56,492 psi | 87% | 3192 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,419 psi | 85% | 3173 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,216 psi | 85% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,066 psi | 74% | 3196 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,710 psi | 87% | 3245 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 56% | 2018 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,347 psi | 85% | 3110 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,812 psi | 89% | 3150 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 58,523 psi | 90% | 3192 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,259 psi | 85% | 3127 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 58,073 psi | 89% | 3202 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,566 psi | 90% | 3209 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,812 psi | 89% | 3179 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,827 psi | 89% | 3291 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 55,782 psi | 86% | 3104 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,651 psi | 86% | 3127 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 57,145 psi | 88% | 3173 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,067 psi | 77% | 3058 fps | 99% |
| Norma 203B | <<locked>> | 82% | 56,362 psi | 87% | 3159 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,927 psi | 86% | 3189 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 55,782 psi | 86% | 3278 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 56,217 psi | 86% | 3196 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,493 psi | 88% | 3186 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,697 psi | 90% | 3314 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 55,143 psi | 85% | 3192 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,852 psi | 81% | 3173 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 58% | 2064 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 58,233 psi | 90% | 3176 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,492 psi | 85% | 3228 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,870 psi | 89% | 3235 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,173 psi | 86% | 3264 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,486 psi | 75% | 3192 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,493 psi | 88% | 3117 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 58,363 psi | 90% | 3169 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,550 psi | 87% | 3169 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 57,508 psi | 88% | 3235 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 57,319 psi | 88% | 3159 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,651 psi | 86% | 3127 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 55,782 psi | 86% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,145 psi | 88% | 3173 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,260 psi | 87% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,479 psi | 90% | 3041 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,216 psi | 85% | 3074 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,043 psi | 88% | 3228 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 58,088 psi | 89% | 3163 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 58,407 psi | 90% | 3159 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 56,144 psi | 86% | 3199 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 58,204 psi | 90% | 3205 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 58,175 psi | 89% | 3074 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,378 psi | 90% | 3091 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,825 psi | 86% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 58,349 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,566 psi | 89% | 3179 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 56,405 psi | 87% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,377 psi | 88% | 3192 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,564 psi | 85% | 3209 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,825 psi | 86% | 3264 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 58,160 psi | 89% | 3146 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,130 psi | 86% | 3209 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,316 psi | 82% | 3307 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 58,407 psi | 90% | 3202 fps | 98.4% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 53,040 psi | 82% | 3048 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 37,246 psi | 57% | 2785 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 52,881 psi | 81% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,046 psi | 63% | 2900 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,443 psi | 76% | 3015 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 45,049 psi | 69% | 3002 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 49,327 psi | 76% | 3117 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,256 psi | 77% | 3041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,664 psi | 83% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,436 psi | 61% | 2907 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,310 psi | 70% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 44,788 psi | 69% | 2992 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,672 psi | 70% | 3051 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,138 psi | 45% | 2631 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,462 psi | 55% | 2831 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 82% | 33,823 psi | 52% | 2822 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 45,034 psi | 69% | 3035 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,879 psi | 78% | 3054 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,672 psi | 70% | 3051 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,367 psi | 68% | 2913 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 51,126 psi | 79% | 3068 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 42,772 psi | 66% | 2946 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,484 psi | 70% | 2969 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 52,750 psi | 81% | 3127 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,764 psi | 80% | 3107 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,014 psi | 57% | 2789 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,061 psi | 65% | 3051 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,872 psi | 64% | 2956 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 42% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,025 psi | 80% | 3054 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,288 psi | 84% | 3087 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 40,045 psi | 62% | 2831 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,803 psi | 70% | 2946 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 39,189 psi | 60% | 2844 fps | 98.2% |
| IMR 4895 | <<locked>> | 80% | 55,085 psi | 85% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,865 psi | 78% | 3058 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 50,386 psi | 78% | 3153 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,301 psi | 80% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,366 psi | 67% | 2890 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 41,684 psi | 64% | 2871 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 36,085 psi | 56% | 2756 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,026 psi | 82% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,600 psi | 70% | 2992 fps | 95.4% |
| Norma MRP | <<locked>> | 86% | 39,059 psi | 60% | 2930 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,509 psi | 62% | 2890 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 53,708 psi | 83% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,210 psi | 73% | 3097 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,349 psi | 61% | 2871 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 42,134 psi | 65% | 2956 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 43% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,923 psi | 78% | 3048 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,109 psi | 74% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,857 psi | 63% | 2913 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,320 psi | 60% | 2920 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,131 psi | 60% | 2959 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,099 psi | 83% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,964 psi | 74% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 49,734 psi | 77% | 3045 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 43,990 psi | 68% | 2976 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,367 psi | 68% | 2913 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,366 psi | 67% | 2890 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 52,301 psi | 80% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,684 psi | 64% | 2871 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,240 psi | 76% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,689 psi | 75% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,453 psi | 65% | 2831 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,598 psi | 67% | 2969 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,993 psi | 74% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,068 psi | 79% | 3031 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,144 psi | 57% | 2844 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 41,887 psi | 64% | 2894 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 54,621 psi | 84% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,708 psi | 84% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,948 psi | 71% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,930 psi | 65% | 2890 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 41,278 psi | 64% | 2871 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 52,939 psi | 81% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,350 psi | 64% | 2890 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,561 psi | 50% | 2717 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 94% | 51,953 psi | 80% | 3192 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,017 psi | 63% | 2854 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 42,888 psi | 66% | 2949 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,630 psi | 43% | 2664 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,135 psi | 68% | 2940 fps | 95.2% |
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 | 150gr | RWS TMR. Alliant Reloder-26 delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,330 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 150.0 gr projectile in 0.308" calls for a 1:6.0 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. 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.