Load Specifications
Load data in caliber .458 Win.Mag. with .458 | 300gr | Barnes TTSX BT bullet and 36 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and ReloadSwiss RS 36.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 55,898 psi | 90% | 2621 fps | 99.8% |
| Accurate 2015ᴾ | <<locked>> | 100% | 36,956 psi | 59% | 2421 fps | 96.3% |
| Accurate 5744 | <<locked>> | 82% | 55,216 psi | 89% | 2635 fps | 100% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 52,199 psi | 84% | 2559 fps | 97.8% |
| Accurate LT-32ᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2562 fps | 95.9% |
| Accurate No. 11 FS | <<locked>> | 84% | 54,853 psi | 88% | 2579 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 55,259 psi | 89% | 1932 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 55,506 psi | 89% | 2507 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 52,794 psi | 85% | 2657 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 48,762 psi | 78% | 2638 fps | 97% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 34,664 psi | 56% | 2438 fps | 97.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 43,279 psi | 69% | 2552 fps | 98.8% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2664 fps | 99.9% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2552 fps | 97.7% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 43,743 psi | 70% | 2556 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 98% | 54,476 psi | 87% | 2608 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,791 psi | 48% | 1532 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 46,760 psi | 75% | 2552 fps | 99.6% |
| IMR 4227 | <<locked>> | 94% | 54,969 psi | 88% | 2598 fps | 100% |
| Lovex D060 | <<locked>> | 88% | 55,637 psi | 89% | 2641 fps | 100% |
| Lovex D063 | <<locked>> | 84% | 55,680 psi | 89% | 2621 fps | 100% |
| Lovex D073.4ᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2684 fps | 95.7% |
| Lovex S053 | <<locked>> | 96% | 55,405 psi | 89% | 2585 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 2631 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,341 psi | 47% | 1568 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 53,766 psi | 86% | 2625 fps | 100% |
| Shooters World AR Plusᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2684 fps | 95.7% |
| Shooters World Blackout | <<locked>> | 84% | 55,680 psi | 89% | 2621 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 55,637 psi | 89% | 2641 fps | 100% |
| Shooters World SOCOM | <<locked>> | 86% | 53,359 psi | 86% | 2572 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 55,883 psi | 90% | 2441 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 48,660 psi | 78% | 2638 fps | 95.9% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 45,150 psi | 72% | 2556 fps | 97.3% |
| Vihtavuori N110 | <<locked>> | 90% | 55,259 psi | 89% | 2503 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 52,953 psi | 85% | 2612 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 42,264 psi | 68% | 2470 fps | 98.3% |
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 1680 | <<locked>> | 80% | 32,663 psi | 52% | 2241 fps | 95.9% |
| Accurate 2015 | <<locked>> | 98% | 34,621 psi | 56% | 2375 fps | 95.6% |
| Accurate 5744 | <<locked>> | 80% | 51,895 psi | 83% | 2589 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 92% | 40,988 psi | 66% | 2385 fps | 95.5% |
| Accurate LT-32 | <<locked>> | 98% | 49,734 psi | 80% | 2516 fps | 95.2% |
| Accurate No. 11 FS | <<locked>> | 80% | 47,950 psi | 77% | 2490 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 53,432 psi | 86% | 1909 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 43,685 psi | 70% | 2349 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 28,108 psi | 45% | 2224 fps | 98.4% |
| ADI AR 2219 | <<locked>> | 96% | 42,598 psi | 68% | 2536 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 94% | 28,877 psi | 46% | 2293 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 88% | 29,704 psi | 48% | 2280 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 29,805 psi | 48% | 2218 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 38,667 psi | 62% | 2372 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 98% | 41,060 psi | 66% | 2510 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 90% | 42,699 psi | 68% | 2428 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,727 psi | 35% | 1368 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 27,847 psi | 45% | 2162 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 35,868 psi | 58% | 2300 fps | 99% |
| Lovex D060 | 53.5 gr | 80% | 43,830 psi | 70% | 2461 fps | 99.2% |
| Lovex D063 | <<locked>> | 80% | 48,718 psi | 78% | 2526 fps | 99.7% |
| Lovex D073.4 | <<locked>> | 98% | 49,197 psi | 79% | 2631 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 34,809 psi | 56% | 2274 fps | 100% |
| Norma 200 | <<locked>> | 82% | 27,528 psi | 44% | 2218 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,379 psi | 34% | 1401 fps | 100% |
| ReloadSwiss RS 36 | 55.7 gr | 80% | 34,722 psi | 56% | 2320 fps | 98.7% |
| Shooters World AR Plus | <<locked>> | 98% | 49,197 psi | 79% | 2631 fps | 95% |
| Shooters World Blackout | <<locked>> | 80% | 48,718 psi | 78% | 2526 fps | 99.7% |
| Shooters World Buffalo Rifle | 53.5 gr | 80% | 43,830 psi | 70% | 2461 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 80% | 43,627 psi | 70% | 2431 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 32,909 psi | 53% | 2123 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 45,368 psi | 73% | 2589 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 37,521 psi | 60% | 2418 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 41,104 psi | 66% | 2320 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 28,427 psi | 46% | 2201 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 90% | 31,038 psi | 50% | 2251 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 36 powders for .458 Win.Mag. loaded with the .458 | 300gr | Barnes TTSX BT. Lovex D073.4 delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,684 fps. Accurate 2015 gives the best case fill at 100 %, and 36 of the 36 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. Accurate 2015, Accurate LT-30, Accurate LT-32 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for .458 Win.Mag. with the .458 | 300gr | Barnes TTSX BT 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.