Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 123gr | Sako Gamehead bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 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 2015 | <<locked>> | 84% | 55,463 psi | 89% | 3248 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,534 psi | 87% | 3268 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,533 psi | 84% | 3278 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 54,766 psi | 88% | 3320 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,752 psi | 88% | 3389 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 86% | 54,955 psi | 88% | 3346 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 55,883 psi | 90% | 3343 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,780 psi | 86% | 3297 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 84% | 54,621 psi | 88% | 3284 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,752 psi | 88% | 3468 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,173 psi | 90% | 3373 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,069 psi | 85% | 3330 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,970 psi | 90% | 3461 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,635 psi | 86% | 3435 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,089 psi | 64% | 3130 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,165 psi | 72% | 3304 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,955 psi | 88% | 3356 fps | 98.8% |
| Bofors RP3 | <<locked>> | 90% | 53,127 psi | 85% | 3323 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,434 psi | 89% | 3281 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,374 psi | 86% | 3323 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,158 psi | 88% | 3428 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 90% | 54,172 psi | 87% | 3337 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 96% | 53,969 psi | 87% | 3379 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 55,492 psi | 89% | 3363 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,040 psi | 83% | 3314 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,143 psi | 88% | 3392 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 57% | 2123 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 53,113 psi | 85% | 3301 fps | 99.5% |
| IMR 3031 | <<locked>> | 86% | 55,317 psi | 89% | 3353 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,361 psi | 89% | 3327 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,390 psi | 89% | 3297 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,259 psi | 89% | 3320 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,390 psi | 89% | 3383 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 54,433 psi | 87% | 3369 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 84% | 53,780 psi | 86% | 3297 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 86% | 54,766 psi | 88% | 3323 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,244 psi | 87% | 3268 fps | 99.4% |
| Lovex S062 | <<locked>> | 90% | 55,347 psi | 89% | 3327 fps | 99.9% |
| Lovex S065 | <<locked>> | 96% | 54,650 psi | 88% | 3310 fps | 97.6% |
| Lovex S070 | <<locked>> | 98% | 55,796 psi | 89% | 3346 fps | 96.7% |
| Norma 201 | <<locked>> | 86% | 53,621 psi | 86% | 3291 fps | 99.8% |
| Norma 202 | <<locked>> | 86% | 54,186 psi | 87% | 3297 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,898 psi | 90% | 3379 fps | 99.6% |
| Norma URP | <<locked>> | 98% | 53,766 psi | 86% | 3376 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 88% | 52,982 psi | 85% | 3340 fps | 99.2% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,304 psi | 90% | 3425 fps | 97.6% |
| Ramshot TAC | <<locked>> | 84% | 54,172 psi | 87% | 3301 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,838 psi | 86% | 3327 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,578 psi | 88% | 3287 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 57% | 2172 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,520 psi | 87% | 3310 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,316 psi | 85% | 3402 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,388 psi | 86% | 3445 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,694 psi | 88% | 3409 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,244 psi | 87% | 3435 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 84% | 54,404 psi | 87% | 3281 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,230 psi | 87% | 3291 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 92% | 53,229 psi | 85% | 3317 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,650 psi | 88% | 3310 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,766 psi | 88% | 3323 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,347 psi | 89% | 3327 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 55,796 psi | 89% | 3346 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,998 psi | 88% | 3383 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,289 psi | 90% | 3340 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,301 psi | 85% | 3307 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,998 psi | 88% | 3232 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,288 psi | 89% | 3225 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,056 psi | 88% | 3255 fps | 96.3% |
| Somchem S321 | <<locked>> | 82% | 55,129 psi | 88% | 3330 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,462 psi | 87% | 3228 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,072 psi | 90% | 3333 fps | 99.5% |
| Somchem S355 | <<locked>> | 92% | 53,505 psi | 86% | 3317 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,866 psi | 83% | 3383 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,665 psi | 88% | 3199 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,187 psi | 88% | 3219 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,838 psi | 86% | 3258 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,810 psi | 88% | 3274 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,940 psi | 88% | 3294 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,289 psi | 90% | 3373 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 54,259 psi | 87% | 3297 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 88% | 53,040 psi | 85% | 3258 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,477 psi | 89% | 3376 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,121 psi | 71% | 3222 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,258 psi | 85% | 3287 fps | 99.7% |
| Winchester 748 | <<locked>> | 84% | 54,360 psi | 87% | 3346 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,186 psi | 87% | 3383 fps | 96.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,984 psi | 58% | 3100 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,301 psi | 85% | 3317 fps | 99.6% |
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% | 49,095 psi | 79% | 3143 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,756 psi | 67% | 3041 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,110 psi | 79% | 3219 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,479 psi | 63% | 3025 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 41,336 psi | 66% | 3120 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 45,310 psi | 73% | 3159 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 38,363 psi | 62% | 2972 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,340 psi | 76% | 3173 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 47,572 psi | 76% | 3169 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,234 psi | 66% | 3169 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,189 psi | 61% | 3002 fps | 97.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,973 psi | 66% | 3074 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,553 psi | 65% | 3123 fps | 95.6% |
| Alliant Reloder-17 | 67.2 gr | 82% | 35,418 psi | 57% | 3009 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 35,244 psi | 57% | 2992 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,119 psi | 68% | 3232 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,628 psi | 72% | 3153 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 37,971 psi | 61% | 3002 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,921 psi | 78% | 3166 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,354 psi | 74% | 3189 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,285 psi | 82% | 3356 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 82% | 41,365 psi | 66% | 3068 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 94% | 50,386 psi | 81% | 3310 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,716 psi | 73% | 3173 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 35,157 psi | 56% | 2940 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,858 psi | 67% | 3130 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 42% | 1906 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,859 psi | 70% | 3117 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 45,382 psi | 73% | 3179 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,248 psi | 65% | 3018 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,967 psi | 83% | 3235 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 51,996 psi | 83% | 3258 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 39,581 psi | 63% | 3058 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 41,989 psi | 67% | 3114 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 47,340 psi | 76% | 3173 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 44,614 psi | 72% | 3136 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 45,194 psi | 72% | 3091 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 40,335 psi | 65% | 3025 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 45,498 psi | 73% | 3130 fps | 95.4% |
| Lovex S070 | <<locked>> | 94% | 49,081 psi | 79% | 3222 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,295 psi | 71% | 3107 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 44,715 psi | 72% | 3120 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 40,364 psi | 65% | 3061 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 41,147 psi | 66% | 3114 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,943 psi | 64% | 3064 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 46,079 psi | 74% | 3225 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 47,485 psi | 76% | 3169 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,065 psi | 75% | 3196 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,227 psi | 82% | 3228 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 43% | 1949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 47,877 psi | 77% | 3182 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,163 psi | 69% | 3189 fps | 96.9% |
| ReloadSwiss RS 60 | 65.5 gr | 80% | 35,128 psi | 56% | 3018 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,002 psi | 66% | 3130 fps | 95.2% |
| ReloadSwiss RS 70 | 76.5 gr | 92% | 43,947 psi | 70% | 3212 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,095 psi | 77% | 3163 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,061 psi | 67% | 3048 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,592 psi | 57% | 2933 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,498 psi | 73% | 3130 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,614 psi | 72% | 3136 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 40,335 psi | 65% | 3025 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 94% | 49,081 psi | 79% | 3222 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,564 psi | 59% | 2986 fps | 95.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,701 psi | 73% | 3136 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,816 psi | 70% | 3117 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,600 psi | 73% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,971 psi | 61% | 2900 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,706 psi | 83% | 3196 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 51,445 psi | 82% | 3261 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 45,208 psi | 72% | 3064 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,411 psi | 73% | 3136 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 36,332 psi | 58% | 2943 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 32,242 psi | 52% | 2917 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 51,372 psi | 82% | 3146 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,905 psi | 74% | 3061 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,626 psi | 67% | 3041 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,279 psi | 68% | 3041 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,621 psi | 56% | 2871 fps | 97% |
| Vihtavuori N160 | <<locked>> | 88% | 40,263 psi | 65% | 3054 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 47,572 psi | 76% | 3173 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,785 psi | 65% | 3022 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 42,496 psi | 68% | 3117 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 38,421 psi | 62% | 3087 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 35,302 psi | 57% | 2897 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 47,311 psi | 76% | 3219 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 50,604 psi | 81% | 3314 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,663 psi | 54% | 3018 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,424 psi | 70% | 3120 fps | 98.1% |
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 88 powders for .300 Win. Mag. loaded with the .308 | 123gr | Sako Gamehead. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,468 fps; across all powders the maximum-charge window runs from 2,123 fps to 3,468 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 88 of the 88 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. 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 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 123gr | Sako Gamehead 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.