Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 115gr | Sierra VarmintKing bullet and 87 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 Alliant Power Pro 2000-MR.
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>> | 86% | 56,347 psi | 90% | 3360 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,940 psi | 88% | 3376 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,056 psi | 88% | 3373 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,274 psi | 89% | 3425 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 54,926 psi | 88% | 3415 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 3484 fps | 98.2% |
| ADI AR 2206H | <<locked>> | 88% | 55,492 psi | 89% | 3448 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 92% | 53,200 psi | 85% | 3383 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,607 psi | 88% | 3399 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 86% | 55,027 psi | 88% | 3389 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,217 psi | 90% | 3530 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,347 psi | 89% | 3570 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,156 psi | 85% | 3409 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,724 psi | 89% | 3369 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,737 psi | 86% | 3432 fps | 98.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,707 psi | 85% | 3481 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,099 psi | 87% | 3530 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,579 psi | 89% | 3455 fps | 98.4% |
| Bofors RP3 | <<locked>> | 92% | 53,664 psi | 86% | 3422 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,420 psi | 90% | 3389 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,969 psi | 87% | 3422 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,869 psi | 90% | 3533 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 84% | 54,273 psi | 87% | 3392 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,868 psi | 88% | 3432 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 88% | 56,086 psi | 90% | 3461 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,849 psi | 78% | 3340 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,608 psi | 89% | 3494 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 56% | 2185 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,188 psi | 90% | 3445 fps | 99.5% |
| IMR 3031 | <<locked>> | 90% | 54,041 psi | 87% | 3432 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,042 psi | 88% | 3409 fps | 98.8% |
| IMR 4198 | <<locked>> | 82% | 55,521 psi | 89% | 3330 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,093 psi | 74% | 3287 fps | 96.4% |
| IMR 4895 | <<locked>> | 90% | 55,071 psi | 88% | 3468 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 86% | 54,607 psi | 88% | 3399 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 82% | 54,795 psi | 88% | 3383 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 88% | 55,274 psi | 89% | 3425 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,245 psi | 89% | 3373 fps | 99.1% |
| Lovex S062 | <<locked>> | 92% | 55,854 psi | 90% | 3425 fps | 99.8% |
| Lovex S065 | <<locked>> | 98% | 55,158 psi | 88% | 3402 fps | 97% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3438 fps | 96% |
| Norma 201 | <<locked>> | 88% | 54,404 psi | 87% | 3392 fps | 99.7% |
| Norma 202 | <<locked>> | 88% | 54,723 psi | 88% | 3399 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,333 psi | 90% | 3478 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 53,998 psi | 87% | 3465 fps | 98% |
| Ramshot Big Game | <<locked>> | 90% | 53,432 psi | 86% | 3432 fps | 98.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,142 psi | 85% | 3448 fps | 96.1% |
| Ramshot TAC | <<locked>> | 86% | 55,187 psi | 88% | 3402 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,752 psi | 88% | 3428 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,651 psi | 89% | 3396 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,476 psi | 57% | 2234 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,940 psi | 86% | 3383 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,259 psi | 89% | 3406 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,998 psi | 87% | 3501 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,925 psi | 86% | 3543 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,969 psi | 88% | 3501 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,911 psi | 88% | 3527 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 86% | 55,027 psi | 88% | 3383 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,824 psi | 88% | 3389 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 94% | 53,505 psi | 86% | 3412 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,158 psi | 88% | 3402 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,274 psi | 89% | 3425 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,854 psi | 90% | 3425 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 3438 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,550 psi | 89% | 3481 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,359 psi | 86% | 3373 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,172 psi | 87% | 3409 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,796 psi | 89% | 3337 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,072 psi | 90% | 3327 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 56,057 psi | 90% | 3435 fps | 99.8% |
| Somchem S335 | <<locked>> | 88% | 55,376 psi | 89% | 3333 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,156 psi | 85% | 3369 fps | 98.8% |
| Somchem S355 | <<locked>> | 94% | 53,896 psi | 86% | 3412 fps | 99.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,341 psi | 78% | 3402 fps | 99.5% |
| Unknown powder | <<locked>> | 98% | 55,129 psi | 88% | 3478 fps | 97.6% |
| Vihtavuori N130 | <<locked>> | 84% | 54,360 psi | 87% | 3294 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,303 psi | 89% | 3320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,230 psi | 87% | 3360 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,491 psi | 87% | 3363 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,317 psi | 89% | 3392 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 98% | 55,985 psi | 90% | 3448 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 84% | 54,244 psi | 87% | 3409 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 90% | 54,317 psi | 87% | 3389 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,231 psi | 90% | 3504 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,954 psi | 87% | 3383 fps | 99.5% |
| Winchester 748 | <<locked>> | 84% | 55,680 psi | 89% | 3461 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,521 psi | 89% | 3442 fps | 99.5% |
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% | 46,528 psi | 75% | 3189 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,155 psi | 82% | 3310 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,363 psi | 63% | 3081 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,802 psi | 72% | 3228 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 37,159 psi | 60% | 3051 fps | 98.9% |
| Accurate 4350 | <<locked>> | 94% | 44,396 psi | 71% | 3271 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,917 psi | 69% | 3186 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 41,423 psi | 66% | 3130 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,947 psi | 72% | 3209 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 44,846 psi | 72% | 3222 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,417 psi | 84% | 3458 fps | 99.1% |
| Alliant Power Pro 2000-MR | 67.8 gr | 82% | 41,800 psi | 67% | 3261 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,984 psi | 58% | 3025 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,272 psi | 84% | 3314 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,394 psi | 66% | 3166 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 43,627 psi | 70% | 3278 fps | 95.7% |
| Alliant Reloder-17 | 70.1 gr | 86% | 38,348 psi | 61% | 3169 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,337 psi | 68% | 3179 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 35,578 psi | 57% | 3022 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,833 psi | 75% | 3209 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,947 psi | 70% | 3222 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,283 psi | 77% | 3386 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,645 psi | 76% | 3274 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 44,759 psi | 72% | 3228 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,308 psi | 69% | 3202 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 37,623 psi | 60% | 3081 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,334 psi | 63% | 3153 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 42% | 1959 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,479 psi | 62% | 3068 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 39,059 psi | 63% | 3133 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 40,466 psi | 65% | 3100 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 52,315 psi | 84% | 3278 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 43,163 psi | 69% | 3222 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,639 psi | 64% | 3133 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,947 psi | 72% | 3209 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 51,024 psi | 82% | 3314 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,959 psi | 67% | 3166 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 43,033 psi | 69% | 3123 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 38,101 psi | 61% | 3051 fps | 96.8% |
| Lovex S065 | <<locked>> | 94% | 48,747 psi | 78% | 3281 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 52,852 psi | 85% | 3376 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 42,105 psi | 68% | 3140 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 42,279 psi | 68% | 3159 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 38,087 psi | 61% | 3084 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 44,193 psi | 71% | 3264 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 40,364 psi | 65% | 3156 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 49,676 psi | 80% | 3383 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 48,356 psi | 78% | 3268 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,556 psi | 71% | 3225 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,762 psi | 78% | 3261 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,223 psi | 42% | 2001 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,444 psi | 81% | 3320 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,764 psi | 83% | 3340 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,524 psi | 65% | 3212 fps | 95.2% |
| ReloadSwiss RS 60 | 65.2 gr | 80% | 33,243 psi | 53% | 3031 fps | 96.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,237 psi | 71% | 3287 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,703 psi | 76% | 3373 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 45,890 psi | 74% | 3209 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 40,001 psi | 64% | 3081 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 35,795 psi | 57% | 3018 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,747 psi | 78% | 3281 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,959 psi | 67% | 3166 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 38,101 psi | 61% | 3051 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 98% | 52,852 psi | 85% | 3376 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 39,595 psi | 63% | 3143 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 46,485 psi | 75% | 3235 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,640 psi | 67% | 3146 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,308 psi | 69% | 3104 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,911 psi | 58% | 2933 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 48,979 psi | 79% | 3304 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 43,120 psi | 69% | 3107 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 43,091 psi | 69% | 3166 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 36,666 psi | 59% | 3028 fps | 95.3% |
| Somchem S365 | <<locked>> | 90% | 34,534 psi | 55% | 3061 fps | 96% |
| Unknown powder | <<locked>> | 92% | 45,034 psi | 72% | 3274 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 48,109 psi | 77% | 3186 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,886 psi | 66% | 3054 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,146 psi | 63% | 3077 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,494 psi | 63% | 3068 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 33,170 psi | 53% | 2913 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 92% | 45,484 psi | 73% | 3248 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 47,471 psi | 76% | 3278 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 39,262 psi | 63% | 3084 fps | 99% |
| Vihtavuori N550 | <<locked>> | 90% | 42,917 psi | 69% | 3228 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,839 psi | 57% | 2979 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 48,414 psi | 78% | 3327 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,459 psi | 83% | 3369 fps | 99% |
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 105 powders for .300 Win. Mag. loaded with the .308 | 115gr | Sierra VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,570 fps; across all powders the maximum-charge window runs from 2,185 fps to 3,570 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Alliant Power Pro 2000-MR rank at the top here: for .300 Win. Mag. with the .308 | 115gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 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.