Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 88gr | Inceptor SRR bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and ReloadSwiss RS 60.
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>> | 90% | 56,927 psi | 89% | 3780 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,855 psi | 89% | 3885 fps | 96.9% |
| Accurate 2460 | <<locked>> | 86% | 55,883 psi | 88% | 3786 fps | 99.8% |
| Accurate 2495 | <<locked>> | 94% | 54,723 psi | 86% | 3770 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,099 psi | 85% | 3783 fps | 99.5% |
| Accurate 4064 | <<locked>> | 96% | 54,447 psi | 85% | 3806 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 84% | 56,391 psi | 88% | 3730 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,811 psi | 89% | 3757 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 92% | 56,536 psi | 89% | 3855 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 82% | 57,624 psi | 90% | 3773 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 54,273 psi | 85% | 3776 fps | 96.8% |
| ADI AR 2219 | <<locked>> | 82% | 53,809 psi | 84% | 3796 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,680 psi | 87% | 3806 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 90% | 55,172 psi | 86% | 3812 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,782 psi | 89% | 3947 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 57,000 psi | 89% | 3973 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 57,203 psi | 90% | 3865 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,362 psi | 88% | 3802 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,346 psi | 85% | 3819 fps | 96.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3921 fps | 98.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,289 psi | 88% | 3694 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 57,116 psi | 90% | 3855 fps | 97% |
| Bofors RP3 | <<locked>> | 96% | 54,186 psi | 85% | 3809 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,201 psi | 85% | 3737 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,187 psi | 86% | 3829 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,971 psi | 89% | 3944 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 86% | 56,304 psi | 88% | 3839 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,983 psi | 85% | 3783 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 92% | 57,072 psi | 89% | 3871 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,478 psi | 89% | 3891 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,055 psi | 53% | 2497 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,013 psi | 86% | 3809 fps | 98% |
| IMR 3031 | <<locked>> | 92% | 56,130 psi | 88% | 3881 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 57,116 psi | 90% | 3825 fps | 97.5% |
| IMR 4198 | <<locked>> | 86% | 56,507 psi | 89% | 3773 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 55,753 psi | 87% | 3865 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 90% | 55,680 psi | 87% | 3806 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 86% | 55,883 psi | 88% | 3786 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 92% | 56,014 psi | 88% | 3829 fps | 99.7% |
| Lovex S060 | <<locked>> | 92% | 56,536 psi | 89% | 3780 fps | 97.9% |
| Lovex S062 | <<locked>> | 96% | 56,478 psi | 89% | 3822 fps | 98.9% |
| Norma 200 | <<locked>> | 82% | 56,115 psi | 88% | 3773 fps | 100% |
| Norma 201 | <<locked>> | 92% | 54,897 psi | 86% | 3793 fps | 98.6% |
| Norma 202 | <<locked>> | 92% | 55,448 psi | 87% | 3809 fps | 99.9% |
| Norma 203B | <<locked>> | 96% | 57,261 psi | 90% | 3878 fps | 98% |
| Ramshot Big Game | <<locked>> | 94% | 54,592 psi | 86% | 3829 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,985 psi | 88% | 3832 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 57,363 psi | 90% | 3802 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,142 psi | 54% | 2549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,347 psi | 87% | 3806 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,259 psi | 85% | 3894 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,868 psi | 86% | 3940 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 90% | 55,332 psi | 87% | 3793 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 94% | 55,230 psi | 87% | 3783 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3862 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,014 psi | 88% | 3829 fps | 99.7% |
| Shooters World Precision | <<locked>> | 96% | 56,478 psi | 89% | 3822 fps | 98.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,332 psi | 87% | 3757 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,753 psi | 87% | 3461 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,404 psi | 85% | 3796 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,420 psi | 88% | 3871 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 57,508 psi | 90% | 3835 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,172 psi | 86% | 3806 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 57,116 psi | 90% | 3757 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 57,334 psi | 90% | 3737 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 57,609 psi | 90% | 3848 fps | 99.2% |
| Somchem S335 | <<locked>> | 92% | 56,130 psi | 88% | 3737 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,360 psi | 85% | 3763 fps | 97.4% |
| Somchem S355 | <<locked>> | 98% | 54,404 psi | 85% | 3799 fps | 98% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,018 psi | 66% | 3599 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 82% | 57,406 psi | 90% | 3707 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 56,550 psi | 89% | 3737 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 57,014 psi | 89% | 3747 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,418 psi | 85% | 3770 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,246 psi | 88% | 3780 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3783 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 90% | 56,376 psi | 88% | 3812 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 94% | 54,766 psi | 86% | 3763 fps | 99.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3688 fps | 97.8% |
| Winchester 748 | <<locked>> | 90% | 56,086 psi | 88% | 3862 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,100 psi | 86% | 3816 fps | 98.2% |
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% | 40,814 psi | 64% | 3455 fps | 99.5% |
| Accurate 2200 | <<locked>> | 80% | 53,040 psi | 83% | 3809 fps | 96.1% |
| Accurate 2460 | <<locked>> | 80% | 44,875 psi | 70% | 3563 fps | 98.5% |
| Accurate 2495 | <<locked>> | 80% | 33,098 psi | 52% | 3274 fps | 98.1% |
| Accurate 2520 | <<locked>> | 80% | 40,132 psi | 63% | 3474 fps | 96.9% |
| Accurate 4064 | <<locked>> | 82% | 33,649 psi | 53% | 3304 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 49,734 psi | 78% | 3606 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 50,067 psi | 78% | 3625 fps | 99% |
| ADI AR 2206H | <<locked>> | 86% | 46,267 psi | 73% | 3632 fps | 95.4% |
| ADI AR 2207 | <<locked>> | 80% | 54,244 psi | 85% | 3717 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 47,630 psi | 75% | 3632 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 50,154 psi | 79% | 3720 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 42,714 psi | 67% | 3524 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 80% | 38,682 psi | 61% | 3484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,108 psi | 72% | 3714 fps | 95.9% |
| Alliant Power Pro 2000-MR | 81 gr | 90% | 49,284 psi | 77% | 3799 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 43,845 psi | 69% | 3579 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,311 psi | 73% | 3612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 47,442 psi | 74% | 3668 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 94% | 44,527 psi | 70% | 3668 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,269 psi | 77% | 3566 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 49,559 psi | 78% | 3701 fps | 95.2% |
| Bofors RP3 | <<locked>> | 90% | 43,540 psi | 68% | 3576 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,814 psi | 66% | 3461 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,305 psi | 60% | 3438 fps | 95% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,965 psi | 77% | 3776 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 45,585 psi | 71% | 3622 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 80% | 46,760 psi | 73% | 3635 fps | 99% |
| Hodgdon H4895 | <<locked>> | 84% | 43,555 psi | 68% | 3573 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 42,438 psi | 67% | 3583 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,077 psi | 39% | 2247 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 45,092 psi | 71% | 3593 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 36,782 psi | 58% | 3448 fps | 98.2% |
| IMR 4064 | <<locked>> | 90% | 46,949 psi | 74% | 3612 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 47,021 psi | 74% | 3599 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 45,411 psi | 71% | 3642 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 82% | 42,714 psi | 67% | 3524 fps | 95.8% |
| Lovex D073.5 | <<locked>> | 80% | 44,904 psi | 70% | 3560 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 36,071 psi | 57% | 3373 fps | 95.5% |
| Lovex S060 | <<locked>> | 86% | 46,775 psi | 73% | 3573 fps | 95.7% |
| Lovex S062 | <<locked>> | 86% | 40,640 psi | 64% | 3471 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 52,402 psi | 82% | 3707 fps | 100% |
| Norma 201 | <<locked>> | 84% | 42,119 psi | 66% | 3504 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 37,057 psi | 58% | 3389 fps | 96.6% |
| Norma 203B | <<locked>> | 90% | 46,659 psi | 73% | 3655 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 90% | 47,181 psi | 74% | 3671 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 45,266 psi | 71% | 3599 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 82% | 46,688 psi | 73% | 3579 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,106 psi | 39% | 2297 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,991 psi | 71% | 3583 fps | 97.8% |
| ReloadSwiss RS 52 | 78.5 gr | 90% | 50,444 psi | 79% | 3812 fps | 95.8% |
| ReloadSwiss RS 60 | 78 gr | 88% | 38,421 psi | 60% | 3520 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 40,248 psi | 63% | 3455 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 86% | 42,540 psi | 67% | 3504 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 92% | 43,555 psi | 68% | 3566 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,071 psi | 57% | 3373 fps | 95.5% |
| Shooters World Precision | <<locked>> | 86% | 40,640 psi | 64% | 3471 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,877 psi | 75% | 3606 fps | 96.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,779 psi | 83% | 3419 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,705 psi | 79% | 3720 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 45,556 psi | 71% | 3638 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,181 psi | 74% | 3635 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 44,991 psi | 71% | 3583 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,493 psi | 60% | 3356 fps | 97.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,531 psi | 49% | 3150 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 43,163 psi | 68% | 3543 fps | 96.4% |
| Somchem S335 | <<locked>> | 80% | 38,072 psi | 60% | 3350 fps | 97.9% |
| Somchem S341 | <<locked>> | 86% | 47,079 psi | 74% | 3609 fps | 95.6% |
| Somchem S355 | <<locked>> | 92% | 44,425 psi | 70% | 3579 fps | 95.5% |
| Somchem S365 | <<locked>> | 98% | 39,131 psi | 61% | 3520 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 54,070 psi | 85% | 3652 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,787 psi | 69% | 3491 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,638 psi | 61% | 3369 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 80% | 33,721 psi | 53% | 3301 fps | 98.2% |
| Vihtavuori N140 | <<locked>> | 80% | 34,925 psi | 55% | 3297 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 90% | 39,929 psi | 63% | 3428 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 82% | 42,699 psi | 67% | 3514 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 33,736 psi | 53% | 3264 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 44,831 psi | 70% | 3530 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 38,870 psi | 61% | 3474 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 44,498 psi | 70% | 3583 fps | 95.7% |
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 81 powders for .300 Weath. Mag. loaded with the .308 | 88gr | Inceptor SRR. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,973 fps; across all powders the maximum-charge window runs from 2,497 fps to 3,973 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, 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. Alliant Reloder-17, Hodgdon TrailBoss, ReloadSwiss RS 14 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 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .300 Weath. Mag. with the .308 | 88gr | Inceptor SRR 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.