Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 88gr | Inceptor SRR bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Hodgdon LEVERevolution and Hodgdon H4895.
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 2015 | <<locked>> | 92% | 54,694 psi | 88% | 3714 fps | 100% |
| Accurate 2460 | <<locked>> | 88% | 53,635 psi | 86% | 3720 fps | 99.3% |
| Accurate 2495 | <<locked>> | 98% | 55,172 psi | 88% | 3760 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,434 psi | 89% | 3783 fps | 99.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,853 psi | 88% | 3789 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 86% | 55,492 psi | 89% | 3678 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 86% | 55,883 psi | 90% | 3701 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 94% | 54,331 psi | 87% | 3776 fps | 96.7% |
| ADI AR 2207 | <<locked>> | 84% | 56,275 psi | 90% | 3727 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,477 psi | 89% | 3763 fps | 96.2% |
| ADI AR 2219 | <<locked>> | 86% | 55,811 psi | 89% | 3802 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,722 psi | 86% | 3737 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 94% | 56,318 psi | 90% | 3819 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,462 psi | 87% | 3871 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,926 psi | 88% | 3799 fps | 97.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,244 psi | 87% | 3783 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 88% | 54,505 psi | 87% | 3750 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,506 psi | 89% | 3809 fps | 96.4% |
| Alliant Reloder-7 | <<locked>> | 82% | 53,925 psi | 86% | 3678 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,027 psi | 88% | 3645 fps | 100% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,810 psi | 88% | 3793 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,086 psi | 90% | 3737 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 52,649 psi | 84% | 3750 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,418 psi | 87% | 3862 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 88% | 54,114 psi | 87% | 3773 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 88% | 55,840 psi | 90% | 3793 fps | 99.7% |
| Hodgdon H4198 | <<locked>> | 82% | 53,664 psi | 86% | 3678 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 94% | 54,737 psi | 88% | 3793 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,621 psi | 86% | 3809 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,431 psi | 54% | 2438 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,113 psi | 85% | 3737 fps | 96.9% |
| IMR 3031 | <<locked>> | 94% | 53,229 psi | 85% | 3809 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 54,926 psi | 88% | 3747 fps | 96.3% |
| IMR 4198 | <<locked>> | 88% | 55,143 psi | 88% | 3724 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,011 psi | 85% | 3780 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 92% | 53,722 psi | 86% | 3737 fps | 97.8% |
| Lovex D073.4 | <<locked>> | 82% | 53,084 psi | 85% | 3737 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 88% | 53,693 psi | 86% | 3717 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 94% | 53,113 psi | 85% | 3747 fps | 99% |
| Lovex S060 | <<locked>> | 94% | 54,955 psi | 88% | 3707 fps | 96.8% |
| Lovex S062 | <<locked>> | 98% | 53,795 psi | 86% | 3740 fps | 97.9% |
| Norma 200 | <<locked>> | 84% | 54,346 psi | 87% | 3717 fps | 100% |
| Norma 201 | <<locked>> | 96% | 56,188 psi | 90% | 3783 fps | 98.3% |
| Norma 202 | <<locked>> | 94% | 53,098 psi | 85% | 3737 fps | 99.4% |
| Norma 203B | <<locked>> | 98% | 54,563 psi | 87% | 3793 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 98% | 55,724 psi | 89% | 3819 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,751 psi | 86% | 3753 fps | 96.5% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,695 psi | 89% | 3734 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,504 psi | 54% | 2490 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,359 psi | 86% | 3734 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,056 psi | 88% | 3881 fps | 96.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 3842 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 92% | 53,374 psi | 86% | 3724 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 96% | 53,011 psi | 85% | 3707 fps | 97.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,720 psi | 81% | 3701 fps | 96.7% |
| Shooters World AR Plus | <<locked>> | 82% | 53,084 psi | 85% | 3737 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,113 psi | 85% | 3747 fps | 99% |
| Shooters World Precision | <<locked>> | 98% | 53,795 psi | 86% | 3740 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 53,780 psi | 86% | 3688 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 55,129 psi | 88% | 3425 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 52,765 psi | 85% | 3737 fps | 99.3% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,403 psi | 86% | 3780 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 55,680 psi | 89% | 3773 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 52,881 psi | 85% | 3727 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 55,288 psi | 89% | 3691 fps | 99.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,940 psi | 88% | 3668 fps | 99.9% |
| Somchem S321 | <<locked>> | 90% | 55,477 psi | 89% | 3780 fps | 98.4% |
| Somchem S335 | <<locked>> | 94% | 54,085 psi | 87% | 3675 fps | 99.8% |
| Somchem S341 | <<locked>> | 94% | 56,028 psi | 90% | 3760 fps | 96.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,503 psi | 83% | 3711 fps | 96.6% |
| Vihtavuori N120 | <<locked>> | 84% | 56,188 psi | 90% | 3665 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 54,839 psi | 88% | 3681 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 54,998 psi | 88% | 3684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,245 psi | 89% | 3763 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 53,809 psi | 86% | 3711 fps | 99.7% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,067 psi | 80% | 3635 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 92% | 54,317 psi | 87% | 3737 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 98% | 56,072 psi | 90% | 3760 fps | 99.6% |
| Winchester 748 | <<locked>> | 92% | 53,476 psi | 86% | 3786 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 94% | 52,591 psi | 84% | 3734 fps | 97% |
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% | 36,666 psi | 59% | 3323 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 40,277 psi | 65% | 3425 fps | 96.7% |
| Accurate 2495 | <<locked>> | 80% | 28,964 psi | 46% | 3130 fps | 96% |
| Accurate 2520 | <<locked>> | 82% | 38,261 psi | 61% | 3402 fps | 95.6% |
| Accurate 4064 | <<locked>> | 86% | 33,910 psi | 54% | 3297 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 45,643 psi | 73% | 3481 fps | 99.1% |
| Accurate LT-32 | <<locked>> | 80% | 45,977 psi | 74% | 3497 fps | 97.8% |
| ADI AR 2206H | <<locked>> | 92% | 50,908 psi | 82% | 3707 fps | 95.9% |
| ADI AR 2207 | <<locked>> | 80% | 49,400 psi | 79% | 3609 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 52,185 psi | 84% | 3698 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 45,121 psi | 72% | 3589 fps | 98.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 44,063 psi | 71% | 3524 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 34,069 psi | 55% | 3350 fps | 99.6% |
| Alliant Power Pro 1200-R | 64.3 gr | 84% | 47,529 psi | 76% | 3717 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 47,979 psi | 77% | 3648 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 44,440 psi | 71% | 3570 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,930 psi | 67% | 3491 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 96% | 51,764 psi | 83% | 3734 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 50,531 psi | 81% | 3615 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,034 psi | 72% | 3451 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 44,237 psi | 71% | 3570 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 40,814 psi | 65% | 3402 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,293 psi | 68% | 3520 fps | 95.6% |
| Hodgdon CFE223 | <<locked>> | 88% | 50,444 psi | 81% | 3776 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 40,944 psi | 66% | 3484 fps | 98% |
| Hodgdon H335 | <<locked>> | 80% | 41,945 psi | 67% | 3494 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 80% | 50,299 psi | 81% | 3612 fps | 99.4% |
| Hodgdon H4895 | 68.8 gr | 90% | 47,805 psi | 77% | 3648 fps | 95.7% |
| Hodgdon LEVERevolution | 73.5 gr | 92% | 46,499 psi | 75% | 3655 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,511 psi | 39% | 2188 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 46,383 psi | 74% | 3593 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 32,445 psi | 52% | 3304 fps | 96.1% |
| IMR 4064 | <<locked>> | 96% | 51,387 psi | 82% | 3675 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 42,989 psi | 69% | 3484 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 49,603 psi | 80% | 3707 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 86% | 44,063 psi | 71% | 3524 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 80% | 49,385 psi | 79% | 3658 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 40,147 psi | 64% | 3419 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 84% | 36,825 psi | 59% | 3373 fps | 95% |
| Lovex S060 | <<locked>> | 90% | 48,385 psi | 78% | 3573 fps | 95.3% |
| Lovex S062 | <<locked>> | 92% | 44,324 psi | 71% | 3537 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 47,558 psi | 76% | 3589 fps | 100% |
| Norma 201 | <<locked>> | 88% | 43,323 psi | 69% | 3504 fps | 95.3% |
| Norma 202 | <<locked>> | 82% | 35,433 psi | 57% | 3320 fps | 95.3% |
| Norma 203B | <<locked>> | 94% | 47,587 psi | 76% | 3645 fps | 95% |
| Ramshot Big Game | <<locked>> | 96% | 51,721 psi | 83% | 3740 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 50,125 psi | 80% | 3678 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 48,530 psi | 78% | 3589 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,526 psi | 39% | 2238 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,625 psi | 65% | 3445 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 51,097 psi | 82% | 3799 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 42,134 psi | 68% | 3593 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 36,274 psi | 58% | 3317 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 90% | 43,671 psi | 70% | 3504 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 98% | 47,079 psi | 75% | 3625 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 49,385 psi | 79% | 3658 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 36,825 psi | 59% | 3373 fps | 95% |
| Shooters World Precision | <<locked>> | 92% | 44,324 psi | 71% | 3537 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 46,456 psi | 74% | 3537 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,487 psi | 79% | 3333 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,701 psi | 73% | 3586 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 49,763 psi | 80% | 3704 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,743 psi | 69% | 3510 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 49,559 psi | 79% | 3655 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,983 psi | 56% | 3228 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 32,489 psi | 52% | 3156 fps | 95.5% |
| Somchem S321 | <<locked>> | 82% | 41,597 psi | 67% | 3474 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 34,432 psi | 55% | 3222 fps | 96% |
| Somchem S341 | <<locked>> | 90% | 48,472 psi | 78% | 3609 fps | 95.2% |
| Somchem S355 | <<locked>> | 98% | 48,182 psi | 77% | 3638 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 49,371 psi | 79% | 3550 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 39,871 psi | 64% | 3373 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 34,969 psi | 56% | 3248 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 29,863 psi | 48% | 3166 fps | 96.3% |
| Vihtavuori N140 | <<locked>> | 82% | 33,431 psi | 54% | 3232 fps | 95% |
| Vihtavuori N150 | <<locked>> | 94% | 40,538 psi | 65% | 3422 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 86% | 44,164 psi | 71% | 3520 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 86% | 37,173 psi | 60% | 3343 fps | 95.9% |
| Winchester 748 | <<locked>> | 84% | 40,030 psi | 64% | 3481 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 45,643 psi | 73% | 3583 fps | 95.2% |
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 94 powders for .300 Win. Mag. loaded with the .308 | 88gr | Inceptor SRR. ReloadSwiss RS 52 delivers the highest muzzle velocity at 3,881 fps; across all powders the maximum-charge window runs from 2,438 fps to 3,881 fps. Accurate 4064 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 (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 88.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 Power Pro 1200-R, Hodgdon LEVERevolution, Hodgdon H4895 rank at the top here: for .300 Win. Mag. with the .308 | 88gr | Inceptor SRR they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon H380, Hodgdon Hybrid 100V, IMR 4166 Enduron 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.