Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 125gr | Remington PSP bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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.
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 2015 | <<locked>> | 84% | 55,811 psi | 89% | 3232 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,955 psi | 88% | 3251 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,969 psi | 88% | 3304 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 54,940 psi | 88% | 3301 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,376 psi | 89% | 3379 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 86% | 55,114 psi | 88% | 3330 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 92% | 56,333 psi | 90% | 3327 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,128 psi | 87% | 3281 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 84% | 54,795 psi | 88% | 3264 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,027 psi | 88% | 3451 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,376 psi | 90% | 3353 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,490 psi | 86% | 3314 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3442 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,969 psi | 87% | 3419 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,335 psi | 65% | 3114 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,542 psi | 73% | 3297 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,216 psi | 89% | 3337 fps | 99% |
| Bofors RP3 | <<locked>> | 90% | 53,592 psi | 86% | 3307 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,753 psi | 89% | 3264 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,635 psi | 86% | 3304 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,608 psi | 89% | 3412 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 53,998 psi | 87% | 3271 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,665 psi | 88% | 3320 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 94% | 56,173 psi | 90% | 3396 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 55,695 psi | 89% | 3343 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,562 psi | 84% | 3301 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,622 psi | 89% | 3376 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 96% | 55,288 psi | 89% | 3399 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 57% | 2106 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,970 psi | 90% | 3330 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 54,070 psi | 87% | 3307 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,882 psi | 88% | 3297 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,447 psi | 87% | 3258 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,709 psi | 89% | 3304 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,414 psi | 79% | 3248 fps | 98% |
| IMR 4895 | <<locked>> | 88% | 54,868 psi | 88% | 3353 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 84% | 54,128 psi | 87% | 3281 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 86% | 55,216 psi | 89% | 3307 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,592 psi | 88% | 3251 fps | 99.5% |
| Lovex S062 | <<locked>> | 90% | 55,506 psi | 89% | 3307 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,114 psi | 88% | 3297 fps | 97.8% |
| Lovex S070 | <<locked>> | 98% | 56,086 psi | 90% | 3333 fps | 96.9% |
| Norma 201 | <<locked>> | 86% | 53,954 psi | 87% | 3271 fps | 99.9% |
| Norma 202 | <<locked>> | 86% | 54,360 psi | 87% | 3278 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,130 psi | 90% | 3363 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 54,114 psi | 87% | 3356 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 88% | 53,214 psi | 85% | 3320 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 98% | 53,040 psi | 85% | 3343 fps | 97% |
| Ramshot TAC | <<locked>> | 84% | 54,563 psi | 87% | 3287 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,056 psi | 87% | 3307 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,955 psi | 88% | 3274 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,882 psi | 58% | 2156 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,752 psi | 88% | 3294 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,766 psi | 86% | 3386 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,693 psi | 86% | 3425 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,085 psi | 88% | 3396 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,607 psi | 88% | 3422 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 84% | 54,737 psi | 88% | 3261 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,389 psi | 87% | 3271 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 92% | 53,461 psi | 86% | 3297 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,114 psi | 88% | 3297 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,216 psi | 89% | 3307 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,506 psi | 89% | 3307 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,086 psi | 90% | 3333 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,259 psi | 89% | 3363 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,895 psi | 85% | 3258 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,679 psi | 86% | 3291 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,259 psi | 89% | 3215 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,724 psi | 89% | 3209 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,579 psi | 89% | 3245 fps | 96.5% |
| Somchem S321 | <<locked>> | 82% | 55,521 psi | 89% | 3310 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,839 psi | 88% | 3209 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,260 psi | 90% | 3314 fps | 99.6% |
| Somchem S355 | <<locked>> | 92% | 53,737 psi | 86% | 3297 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,257 psi | 84% | 3366 fps | 100% |
| Unknown powder | <<locked>> | 96% | 55,143 psi | 88% | 3373 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 82% | 53,853 psi | 86% | 3166 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,882 psi | 88% | 3196 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,186 psi | 87% | 3241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,114 psi | 87% | 3241 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,071 psi | 88% | 3278 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,695 psi | 89% | 3340 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,737 psi | 86% | 3287 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 88% | 53,998 psi | 87% | 3268 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,101 psi | 90% | 3392 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,454 psi | 71% | 3209 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,577 psi | 86% | 3274 fps | 99.8% |
| Winchester 748 | <<locked>> | 82% | 55,288 psi | 89% | 3340 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,173 psi | 90% | 3396 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,230 psi | 58% | 3091 fps | 96.8% |
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 2015 | <<locked>> | 80% | 49,371 psi | 79% | 3127 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,076 psi | 67% | 3025 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,776 psi | 77% | 3176 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,769 psi | 64% | 3009 fps | 99.7% |
| Accurate 4350 | <<locked>> | 88% | 38,812 psi | 62% | 3035 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 45,614 psi | 73% | 3143 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 38,595 psi | 62% | 2959 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,645 psi | 76% | 3156 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 47,906 psi | 77% | 3153 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,524 psi | 67% | 3156 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,464 psi | 62% | 2986 fps | 97.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,263 psi | 66% | 3061 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,901 psi | 66% | 3114 fps | 95.9% |
| Alliant Reloder-17 | 66.8 gr | 82% | 35,563 psi | 57% | 2995 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 35,607 psi | 57% | 2986 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,453 psi | 68% | 3219 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,947 psi | 72% | 3136 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 38,072 psi | 61% | 2986 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,197 psi | 79% | 3150 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,746 psi | 75% | 3176 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,750 psi | 83% | 3343 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 50,415 psi | 81% | 3212 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 41,713 psi | 67% | 3054 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 90% | 48,791 psi | 78% | 3258 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 46,021 psi | 74% | 3156 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 35,418 psi | 57% | 2927 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,537 psi | 63% | 3051 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 94% | 51,416 psi | 82% | 3327 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 42% | 1886 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,712 psi | 65% | 3022 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 41,756 psi | 67% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,840 psi | 61% | 2933 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 51,242 psi | 82% | 3199 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 52,185 psi | 84% | 3241 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 40,654 psi | 65% | 3064 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 42,293 psi | 68% | 3097 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,645 psi | 76% | 3156 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 44,976 psi | 72% | 3120 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 45,440 psi | 73% | 3074 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 40,596 psi | 65% | 3012 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 45,672 psi | 73% | 3114 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 49,545 psi | 79% | 3209 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,570 psi | 71% | 3091 fps | 99% |
| Norma 202 | <<locked>> | 80% | 45,005 psi | 72% | 3107 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,654 psi | 65% | 3048 fps | 97% |
| Norma URP | <<locked>> | 90% | 41,510 psi | 67% | 3100 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 40,277 psi | 65% | 3054 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 46,383 psi | 74% | 3212 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 47,659 psi | 76% | 3150 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,239 psi | 76% | 3176 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,576 psi | 83% | 3212 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,731 psi | 43% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 48,037 psi | 77% | 3163 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,555 psi | 70% | 3179 fps | 97.1% |
| ReloadSwiss RS 60 | 65.2 gr | 80% | 35,375 psi | 57% | 3009 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,423 psi | 66% | 3120 fps | 95.5% |
| ReloadSwiss RS 70 | 76.2 gr | 92% | 44,396 psi | 71% | 3205 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 48,588 psi | 78% | 3153 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,322 psi | 68% | 3031 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,868 psi | 58% | 2920 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,672 psi | 73% | 3114 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,976 psi | 72% | 3120 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 40,596 psi | 65% | 3012 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 94% | 49,545 psi | 79% | 3209 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,869 psi | 59% | 2972 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,079 psi | 74% | 3123 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,135 psi | 71% | 3104 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,832 psi | 73% | 3048 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,189 psi | 61% | 2887 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,924 psi | 83% | 3179 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 51,793 psi | 83% | 3248 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 45,469 psi | 73% | 3048 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,759 psi | 73% | 3123 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 36,579 psi | 59% | 2927 fps | 96.3% |
| Somchem S365 | <<locked>> | 84% | 30,371 psi | 49% | 2838 fps | 95.1% |
| Unknown powder | <<locked>> | 88% | 42,279 psi | 68% | 3110 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 50,589 psi | 81% | 3114 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,134 psi | 69% | 2992 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,901 psi | 67% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,858 psi | 67% | 3015 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,285 psi | 50% | 2762 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 86% | 39,639 psi | 64% | 3012 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,154 psi | 80% | 3222 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 41,626 psi | 67% | 3031 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 40,205 psi | 64% | 3064 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 38,682 psi | 62% | 3074 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 33,257 psi | 53% | 2822 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 51,445 psi | 82% | 3274 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,791 psi | 78% | 3258 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,895 psi | 54% | 3012 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 90 powders for .300 Win. Mag. loaded with the .308 | 125gr | Remington PSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,451 fps; across all powders the maximum-charge window runs from 2,106 fps to 3,451 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 125gr | Remington PSP 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.