Load Specifications
Load data in caliber .450 Marlin with .458 | 360gr | Rhino Penetrator bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4227, Vihtavuori N110 and Lovex S053.
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 5744 | <<locked>> | 84% | 42,830 psi | 89% | 1893 fps | 96.3% |
| Accurate No. 11 FS | <<locked>> | 88% | 42,757 psi | 89% | 1890 fps | 99.1% |
| ADI AR 2205 | <<locked>> | 90% | 43,178 psi | 90% | 1827 fps | 99.8% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 33,808 psi | 71% | 1857 fps | 97.4% |
| Hodgdon LilGun | <<locked>> | 84% | 42,380 psi | 89% | 1929 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,527 psi | 55% | 1122 fps | 100% |
| IMR 4227 | <<locked>> | 98% | 42,946 psi | 90% | 1890 fps | 97.9% |
| Lovex D060 | <<locked>> | 90% | 43,149 psi | 90% | 1896 fps | 96.3% |
| Lovex D063 | <<locked>> | 90% | 42,380 psi | 89% | 1873 fps | 96.8% |
| Lovex S040 | <<locked>> | 82% | 42,119 psi | 88% | 1804 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 42,598 psi | 89% | 1900 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,875 psi | 54% | 1152 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 42,743 psi | 89% | 1936 fps | 97.8% |
| Shooters World Blackout | <<locked>> | 86% | 41,814 psi | 87% | 1873 fps | 96.1% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 43,149 psi | 90% | 1896 fps | 96.3% |
| Shooters World SOCOM | <<locked>> | 90% | 42,380 psi | 89% | 1873 fps | 96.8% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 39,610 psi | 83% | 1772 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 43,062 psi | 90% | 1860 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 34,461 psi | 72% | 1837 fps | 98.5% |
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 5744 | <<locked>> | 80% | 38,159 psi | 80% | 1824 fps | 95% |
| Accurate No. 11 FS | <<locked>> | 80% | 33,228 psi | 69% | 1752 fps | 97.3% |
| ADI AR 2205 | <<locked>> | 80% | 32,039 psi | 67% | 1670 fps | 98.5% |
| ADI AR 2207 | <<locked>> | 94% | 28,326 psi | 59% | 1755 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 37,101 psi | 78% | 1867 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,435 psi | 41% | 1001 fps | 100% |
| IMR 4227 | 31.7 gr | 88% | 32,184 psi | 67% | 1732 fps | 95.1% |
| Lovex D060 | <<locked>> | 86% | 38,464 psi | 80% | 1827 fps | 95.1% |
| Lovex D063 | <<locked>> | 86% | 37,391 psi | 78% | 1804 fps | 95.5% |
| Lovex S040 | <<locked>> | 80% | 39,755 psi | 83% | 1775 fps | 100% |
| Lovex S053 | 28.2 gr | 80% | 24,236 psi | 51% | 1598 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,855 psi | 39% | 1024 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 33,924 psi | 71% | 1804 fps | 95.6% |
| Shooters World Blackout | <<locked>> | 84% | 39,262 psi | 82% | 1841 fps | 95.4% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 38,464 psi | 80% | 1827 fps | 95.1% |
| Shooters World SOCOM | <<locked>> | 86% | 37,391 psi | 78% | 1804 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,337 psi | 49% | 1522 fps | 100% |
| Vihtavuori N110 | 26.9 gr | 80% | 28,587 psi | 60% | 1660 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 26,005 psi | 54% | 1677 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 19 powders for .450 Marlin loaded with the .458 | 360gr | Rhino Penetrator. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,936 fps; across all powders the maximum-charge window runs from 1,122 fps to 1,936 fps. ADI AR 2207 gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. ADI AR 2207, Hodgdon TrailBoss, Lovex S053 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. IMR 4227, Vihtavuori N110, Lovex S053 rank at the top here: for .450 Marlin with the .458 | 360gr | Rhino Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.