Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 90gr | Impala LWHV LS bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 52, Alliant Power Pro 2000-MR 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>> | 84% | 54,998 psi | 86% | 3698 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,377 psi | 90% | 3773 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,085 psi | 86% | 3724 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,753 psi | 87% | 3773 fps | 99.8% |
| Accurate 4064 | <<locked>> | 90% | 54,926 psi | 86% | 3763 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,302 psi | 85% | 3796 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 88% | 57,537 psi | 90% | 3835 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 92% | 55,071 psi | 86% | 3757 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,376 psi | 88% | 3786 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 86% | 56,985 psi | 89% | 3793 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,334 psi | 90% | 3947 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,376 psi | 87% | 3796 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,566 psi | 90% | 3776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,796 psi | 87% | 3812 fps | 97.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3852 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,463 psi | 88% | 3911 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,725 psi | 90% | 3835 fps | 97.6% |
| Bofors RP3 | <<locked>> | 92% | 56,594 psi | 89% | 3816 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,476 psi | 85% | 3707 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,333 psi | 88% | 3809 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,882 psi | 84% | 3842 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 82% | 56,507 psi | 89% | 3802 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,421 psi | 90% | 3816 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 54,723 psi | 86% | 3789 fps | 98.4% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,184 psi | 80% | 3707 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,725 psi | 90% | 3875 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 55% | 2507 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,680 psi | 87% | 3783 fps | 98.6% |
| IMR 3031 | <<locked>> | 86% | 54,128 psi | 85% | 3796 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,520 psi | 85% | 3740 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 56,521 psi | 89% | 3730 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 3780 fps | 97% |
| IMR 4895 | <<locked>> | 90% | 57,203 psi | 90% | 3858 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 86% | 56,376 psi | 88% | 3786 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 82% | 57,450 psi | 90% | 3776 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 86% | 54,317 psi | 85% | 3753 fps | 99.7% |
| Lovex S060 | <<locked>> | 88% | 56,782 psi | 89% | 3753 fps | 98.4% |
| Lovex S062 | <<locked>> | 90% | 54,650 psi | 86% | 3750 fps | 99% |
| Norma 201 | <<locked>> | 88% | 56,666 psi | 89% | 3783 fps | 99.2% |
| Norma 202 | <<locked>> | 88% | 56,956 psi | 89% | 3793 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,100 psi | 86% | 3796 fps | 98.1% |
| Norma URPᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3842 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 90% | 55,608 psi | 87% | 3809 fps | 98.1% |
| Ramshot TAC | <<locked>> | 86% | 57,116 psi | 90% | 3776 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,710 psi | 89% | 3809 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,551 psi | 90% | 3776 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 56% | 2562 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,637 psi | 87% | 3770 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,956 psi | 88% | 3888 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,956 psi | 88% | 3927 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3875 fps | 97.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3898 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 86% | 57,740 psi | 90% | 3789 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,145 psi | 90% | 3780 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 94% | 56,376 psi | 88% | 3802 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,317 psi | 85% | 3753 fps | 99.7% |
| Shooters World Precision | <<locked>> | 90% | 54,650 psi | 86% | 3750 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,682 psi | 90% | 3858 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,854 psi | 88% | 3750 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,101 psi | 88% | 3789 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,711 psi | 90% | 3727 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,462 psi | 85% | 3648 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 54,462 psi | 85% | 3750 fps | 99.1% |
| Somchem S335 | <<locked>> | 88% | 57,305 psi | 90% | 3720 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,114 psi | 86% | 3743 fps | 98% |
| Somchem S355 | <<locked>> | 94% | 56,275 psi | 88% | 3793 fps | 98.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3776 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 57,058 psi | 89% | 3701 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 57,580 psi | 90% | 3714 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,507 psi | 89% | 3760 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,305 psi | 90% | 3760 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,447 psi | 85% | 3711 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 98% | 55,317 psi | 87% | 3773 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 86% | 57,072 psi | 89% | 3786 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 90% | 55,927 psi | 88% | 3743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,868 psi | 86% | 3776 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,289 psi | 88% | 3743 fps | 99% |
| Winchester 748 | <<locked>> | 86% | 56,884 psi | 89% | 3839 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,159 psi | 88% | 3799 fps | 98.7% |
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% | 48,675 psi | 76% | 3579 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,896 psi | 84% | 3707 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 42,815 psi | 67% | 3478 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 48,820 psi | 77% | 3635 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 40,321 psi | 63% | 3442 fps | 98.4% |
| Accurate 4350 | <<locked>> | 96% | 50,604 psi | 79% | 3717 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,889 psi | 70% | 3560 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 86% | 45,847 psi | 72% | 3553 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,659 psi | 73% | 3579 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 46,659 psi | 73% | 3609 fps | 100% |
| Alliant Power Pro 2000-MR | 81.3 gr | 86% | 50,009 psi | 78% | 3786 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 40,480 psi | 63% | 3448 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,128 psi | 85% | 3717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 46,282 psi | 73% | 3606 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,428 psi | 76% | 3707 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,265 psi | 68% | 3602 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,152 psi | 74% | 3609 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 40,741 psi | 64% | 3458 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,327 psi | 76% | 3579 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,209 psi | 72% | 3599 fps | 97.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,038 psi | 78% | 3760 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 53,084 psi | 83% | 3740 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 50,299 psi | 79% | 3668 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 45,237 psi | 71% | 3576 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,250 psi | 66% | 3501 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,263 psi | 65% | 3510 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 2257 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,279 psi | 68% | 3507 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 44,498 psi | 70% | 3599 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 45,339 psi | 71% | 3537 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 53,316 psi | 84% | 3675 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 48,008 psi | 75% | 3642 fps | 95.3% |
| IMR 4895 | <<locked>> | 82% | 44,483 psi | 70% | 3576 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,659 psi | 73% | 3579 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 80% | 53,708 psi | 84% | 3704 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 44,556 psi | 70% | 3547 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 44,701 psi | 70% | 3488 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 40,393 psi | 63% | 3422 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 44,483 psi | 70% | 3520 fps | 97% |
| Norma 202 | <<locked>> | 80% | 44,382 psi | 70% | 3533 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 42,801 psi | 67% | 3517 fps | 95% |
| Norma URP | <<locked>> | 96% | 49,559 psi | 78% | 3701 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 84% | 45,339 psi | 71% | 3589 fps | 95.6% |
| Ramshot TAC | <<locked>> | 84% | 53,577 psi | 84% | 3704 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,456 psi | 73% | 3593 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,618 psi | 79% | 3635 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 42% | 2310 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,228 psi | 82% | 3701 fps | 99.4% |
| ReloadSwiss RS 52 | 75.2 gr | 82% | 45,527 psi | 71% | 3655 fps | 95% |
| ReloadSwiss RS 60 | 76.4 gr | 82% | 37,652 psi | 59% | 3461 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 50,212 psi | 79% | 3727 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,635 psi | 84% | 3816 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 48,573 psi | 76% | 3606 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 42,380 psi | 66% | 3455 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 84% | 40,901 psi | 64% | 3455 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,556 psi | 70% | 3547 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 40,393 psi | 63% | 3422 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 44,295 psi | 69% | 3570 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,257 psi | 82% | 3678 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,352 psi | 68% | 3504 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,252 psi | 71% | 3481 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,811 psi | 59% | 3291 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 50,966 psi | 80% | 3681 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 45,208 psi | 71% | 3481 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 44,947 psi | 70% | 3520 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 41,481 psi | 65% | 3465 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 39,291 psi | 62% | 3488 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 50,763 psi | 80% | 3589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,295 psi | 71% | 3484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,350 psi | 65% | 3455 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 42,003 psi | 66% | 3445 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 37,086 psi | 58% | 3310 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 48,646 psi | 76% | 3635 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 46,949 psi | 74% | 3576 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 40,843 psi | 64% | 3419 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 96% | 51,416 psi | 81% | 3701 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 40,451 psi | 63% | 3389 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 46,456 psi | 73% | 3622 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,062 psi | 67% | 3510 fps | 95.8% |
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 101 powders for .300 Weath. Mag. loaded with the .308 | 90gr | Impala LWHV LS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,947 fps; across all powders the maximum-charge window runs from 2,507 fps to 3,947 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, 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 52, Alliant Power Pro 2000-MR, ReloadSwiss RS 60 rank at the top here: for .300 Weath. Mag. with the .308 | 90gr | Impala LWHV LS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, 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.