Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 140gr | Barnes X BT bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-17.
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 2495 | <<locked>> | 84% | 56,072 psi | 90% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,231 psi | 90% | 3104 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,690 psi | 80% | 3071 fps | 97.3% |
| Accurate 4064 | <<locked>> | 86% | 56,072 psi | 90% | 3127 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,405 psi | 89% | 3205 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,302 psi | 87% | 3136 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 88% | 54,984 psi | 88% | 3133 fps | 99.6% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 3222 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,289 psi | 90% | 3136 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,679 psi | 86% | 3251 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,782 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,188 psi | 90% | 3186 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,288 psi | 89% | 3255 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,084 psi | 85% | 3232 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,013 psi | 88% | 3209 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,325 psi | 74% | 3097 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,547 psi | 84% | 3287 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 53,853 psi | 86% | 3143 fps | 99.4% |
| Bofors RP3 | <<locked>> | 86% | 53,621 psi | 86% | 3133 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,246 psi | 90% | 3146 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,376 psi | 90% | 3169 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 53,882 psi | 86% | 3136 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 92% | 53,664 psi | 86% | 3186 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 90% | 53,722 psi | 86% | 3143 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 54,882 psi | 88% | 3150 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,593 psi | 89% | 3179 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 54,418 psi | 87% | 3182 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 53,650 psi | 86% | 3212 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,593 psi | 89% | 3146 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,172 psi | 88% | 3136 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,708 psi | 88% | 3120 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,114 psi | 87% | 3087 fps | 97.2% |
| IMR 4350 | <<locked>> | 94% | 53,156 psi | 85% | 3110 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,331 psi | 87% | 3117 fps | 97.2% |
| IMR 4831 | <<locked>> | 96% | 55,419 psi | 89% | 3189 fps | 99.5% |
| IMR 4895 | <<locked>> | 84% | 54,273 psi | 87% | 3166 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 56,289 psi | 90% | 3136 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,679 psi | 88% | 3117 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,246 psi | 90% | 3107 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 55,071 psi | 88% | 3120 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,621 psi | 88% | 3120 fps | 98.5% |
| Lovex S070 | <<locked>> | 94% | 55,622 psi | 89% | 3159 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 53,476 psi | 86% | 3084 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,606 psi | 86% | 3084 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,463 psi | 89% | 3173 fps | 99.9% |
| Norma MRPᴾ | <<locked>> | 100% | 51,735 psi | 83% | 3232 fps | 96.8% |
| Norma URP | <<locked>> | 94% | 53,679 psi | 86% | 3182 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 86% | 55,825 psi | 90% | 3192 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 55,985 psi | 90% | 3232 fps | 98.4% |
| Ramshot TAC | <<locked>> | 82% | 56,391 psi | 90% | 3150 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,376 psi | 90% | 3173 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 59% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,780 psi | 86% | 3110 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,142 psi | 85% | 3196 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,347 psi | 90% | 3294 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,795 psi | 88% | 3222 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,316 psi | 85% | 3238 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 84% | 54,099 psi | 87% | 3084 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,664 psi | 86% | 3123 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,288 psi | 87% | 3196 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 92% | 56,246 psi | 90% | 3146 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,621 psi | 88% | 3120 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,679 psi | 88% | 3117 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,071 psi | 88% | 3120 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,622 psi | 89% | 3159 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,288 psi | 87% | 3176 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,579 psi | 89% | 3133 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,883 psi | 90% | 3156 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,099 psi | 87% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,621 psi | 88% | 3015 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,346 psi | 87% | 3064 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 53,911 psi | 86% | 3015 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,897 psi | 88% | 3123 fps | 99.8% |
| Somchem S355 | <<locked>> | 88% | 53,461 psi | 86% | 3117 fps | 99.9% |
| Somchem S365 | <<locked>> | 98% | 55,796 psi | 89% | 3245 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 3179 fps | 97% |
| Vihtavuori N133 | <<locked>> | 82% | 54,273 psi | 87% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,795 psi | 86% | 3051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,143 psi | 87% | 3061 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,723 psi | 88% | 3094 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,956 psi | 90% | 3179 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 86% | 55,883 psi | 90% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,187 psi | 88% | 3182 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 3186 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,709 psi | 89% | 3146 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 53,853 psi | 86% | 3189 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,134 psi | 68% | 3123 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,999 psi | 90% | 3166 fps | 100% |
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 2495 | <<locked>> | 80% | 49,516 psi | 79% | 2976 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 49,501 psi | 79% | 2982 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 40,988 psi | 66% | 2897 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,746 psi | 75% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 37,623 psi | 60% | 2844 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,923 psi | 82% | 3077 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 43,511 psi | 70% | 2913 fps | 98% |
| ADI AR 2209 | <<locked>> | 98% | 52,533 psi | 84% | 3159 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,808 psi | 85% | 3077 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,007 psi | 75% | 3123 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,976 psi | 71% | 2946 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,659 psi | 75% | 3012 fps | 98.8% |
| Alliant Reloder-16 | 60.2 gr | 82% | 36,332 psi | 58% | 2838 fps | 95.5% |
| Alliant Reloder-17 | 63.3 gr | 80% | 38,377 psi | 62% | 2917 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 51,706 psi | 83% | 3146 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,445 psi | 52% | 2746 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 37,507 psi | 60% | 2943 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,372 psi | 81% | 3081 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 44,353 psi | 71% | 2959 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 47,108 psi | 76% | 2972 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,823 psi | 85% | 3114 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,730 psi | 72% | 2956 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 47,253 psi | 76% | 3064 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 50,575 psi | 81% | 3084 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 51,503 psi | 83% | 3091 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,024 psi | 51% | 2680 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,776 psi | 77% | 3061 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 88% | 46,891 psi | 75% | 3077 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 44% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,052 psi | 79% | 3031 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 51,750 psi | 83% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,701 psi | 73% | 2953 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,848 psi | 77% | 2969 fps | 95.8% |
| IMR 4350 | <<locked>> | 90% | 47,181 psi | 76% | 2999 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,469 psi | 73% | 2946 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 36,071 psi | 58% | 2792 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 47,848 psi | 77% | 3045 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 52,808 psi | 85% | 3077 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,358 psi | 82% | 3061 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,140 psi | 80% | 3002 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 46,180 psi | 74% | 2959 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 40,741 psi | 65% | 2841 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 43,976 psi | 71% | 2933 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,343 psi | 81% | 3031 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 50,633 psi | 81% | 3031 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,151 psi | 74% | 2999 fps | 99% |
| Norma MRP | <<locked>> | 96% | 45,513 psi | 73% | 3100 fps | 95% |
| Norma URP | <<locked>> | 82% | 37,043 psi | 59% | 2831 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 45,963 psi | 74% | 3015 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 43,381 psi | 70% | 2989 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 53,011 psi | 85% | 3091 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,910 psi | 85% | 3114 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 44% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,628 psi | 72% | 2933 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,705 psi | 80% | 3133 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,611 psi | 65% | 2989 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,854 psi | 59% | 2851 fps | 95.1% |
| ReloadSwiss RS 70 | 69.1 gr | 86% | 41,133 psi | 66% | 2972 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 48,182 psi | 77% | 2979 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 41,901 psi | 67% | 2900 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 50,952 psi | 82% | 3133 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 47,108 psi | 76% | 2972 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,741 psi | 65% | 2841 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,358 psi | 82% | 3061 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,180 psi | 74% | 2959 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 43,976 psi | 71% | 2933 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,206 psi | 68% | 2940 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,895 psi | 83% | 3071 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,414 psi | 79% | 3041 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,010 psi | 82% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,091 psi | 69% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,281 psi | 73% | 2894 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 50,821 psi | 81% | 2966 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,256 psi | 82% | 3058 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 42,119 psi | 68% | 2897 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 31,575 psi | 51% | 2726 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 48,791 psi | 78% | 3054 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 51,285 psi | 82% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,848 psi | 77% | 2953 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,979 psi | 77% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,234 psi | 65% | 2825 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 35,998 psi | 58% | 2772 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,543 psi | 75% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 38,087 psi | 61% | 2835 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 33,504 psi | 54% | 2782 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,505 psi | 57% | 2740 fps | 97.3% |
| Winchester 760 | <<locked>> | 88% | 47,471 psi | 76% | 3068 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,009 psi | 50% | 2779 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,255 psi | 79% | 3048 fps | 99.7% |
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 89 powders for .300 Win. Mag. loaded with the .308 | 140gr | Barnes X BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,294 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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-16, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 140gr | Barnes X BT 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.