Load Specifications
Load data in caliber .460 Steyr with .458 | 475gr | Impala RNFP KO bullet and 17 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Alliant Reloder-50 and Norma 217.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 8700 | <<locked>> | 94% | 45,977 psi | 86% | 2703 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 84% | 46,006 psi | 86% | 2687 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 88% | 45,745 psi | 85% | 2785 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 86% | 46,151 psi | 86% | 2723 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 47,892 psi | 89% | 2779 fps | 97.9% |
| Alliant Reloder-50 | <<locked>> | 88% | 45,716 psi | 85% | 2730 fps | 96.8% |
| Bofors RP30 | <<locked>> | 82% | 47,007 psi | 88% | 2707 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 82% | 46,818 psi | 87% | 2697 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,450 psi | 72% | 1791 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 88% | 46,166 psi | 86% | 2713 fps | 99.7% |
| Norma 217 | <<locked>> | 88% | 47,413 psi | 88% | 2740 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,610 psi | 74% | 1834 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 45,788 psi | 85% | 2720 fps | 99% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 48,225 psi | 90% | 2717 fps | 97.1% |
| Vihtavuori N170 | <<locked>> | 82% | 47,210 psi | 88% | 2654 fps | 96.3% |
| Vihtavuori N568 | <<locked>> | 82% | 46,441 psi | 87% | 2726 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 84% | 47,558 psi | 89% | 2785 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 8700 | <<locked>> | 90% | 40,277 psi | 75% | 2585 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 80% | 40,379 psi | 75% | 2572 fps | 99% |
| ADI AR 2218 | 201.5 gr | 84% | 40,001 psi | 75% | 2654 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 38,029 psi | 71% | 2562 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 39,030 psi | 73% | 2592 fps | 95.2% |
| Alliant Reloder-50 | 204.6 gr | 84% | 39,987 psi | 75% | 2608 fps | 95% |
| Bofors RP30 | <<locked>> | 80% | 44,179 psi | 82% | 2654 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 43,816 psi | 82% | 2641 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 29,008 psi | 54% | 1601 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 80% | 35,998 psi | 67% | 2497 fps | 97.8% |
| Norma 217 | 177.4 gr | 80% | 36,753 psi | 68% | 2526 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,936 psi | 56% | 1640 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,743 psi | 80% | 2661 fps | 98.4% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,569 psi | 79% | 2605 fps | 95.5% |
| Vihtavuori N170 | <<locked>> | 80% | 44,367 psi | 83% | 2598 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 80% | 43,497 psi | 81% | 2667 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 80% | 41,626 psi | 78% | 2661 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 17 powders for .460 Steyr loaded with the .458 | 475gr | Impala RNFP KO. ADI AR 2218 delivers the highest muzzle velocity at 2,785 fps; across all powders the maximum-charge window runs from 1,791 fps to 2,785 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 17 of the 17 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (370 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 475.0 gr projectile in 0.458" calls for a 1:23.5 twist; slower twists will usually not stabilise this weight. 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. ADI AR 2218, Alliant Reloder-50, Norma 217 rank at the top here: for .460 Steyr with the .458 | 475gr | Impala RNFP KO 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.