Load Specifications
Load data in caliber .360 Buckhammer with .358 | 250gr | Speer Grand Slam bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, ADI AR 2207 and Alliant Reloder-7.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 45,194 psi | 90% | 1841 fps | 97.2% |
| Accurate 5744 | <<locked>> | 84% | 44,846 psi | 90% | 1837 fps | 98.2% |
| Accurate No. 11 FS | <<locked>> | 82% | 42,293 psi | 85% | 1795 fps | 99.7% |
| ADI AR 2205 | <<locked>> | 86% | 44,846 psi | 90% | 1762 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,655 psi | 83% | 1880 fps | 99.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,759 psi | 90% | 1877 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,529 psi | 57% | 1096 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 38,435 psi | 77% | 1788 fps | 96.8% |
| IMR 4227 | <<locked>> | 92% | 42,801 psi | 86% | 1804 fps | 99.1% |
| Lovex D060 | <<locked>> | 86% | 44,846 psi | 90% | 1837 fps | 98.2% |
| Lovex D063 | <<locked>> | 86% | 44,092 psi | 88% | 1814 fps | 98.5% |
| Lovex S053 | <<locked>> | 94% | 43,163 psi | 86% | 1811 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 38,261 psi | 77% | 1844 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,978 psi | 56% | 1125 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 43,613 psi | 87% | 1857 fps | 99.1% |
| Shooters World Blackout | <<locked>> | 82% | 43,540 psi | 87% | 1818 fps | 98% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 44,846 psi | 90% | 1837 fps | 98.2% |
| Shooters World SOCOM | <<locked>> | 86% | 44,092 psi | 88% | 1814 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 44,831 psi | 90% | 1732 fps | 100% |
| Vihtavuori N110 | <<locked>> | 88% | 43,642 psi | 87% | 1765 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,105 psi | 84% | 1854 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 37,289 psi | 75% | 1739 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 39,711 psi | 79% | 1768 fps | 97.1% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,958 psi | 80% | 1765 fps | 99.5% |
| ADI AR 2205 | <<locked>> | 80% | 37,449 psi | 75% | 1670 fps | 99.9% |
| ADI AR 2207 | 21.1 gr | 82% | 24,410 psi | 49% | 1585 fps | 95.3% |
| Alliant Reloder-7 | 24 gr | 90% | 33,054 psi | 66% | 1713 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,697 psi | 41% | 974 fps | 100% |
| IMR 4198 | <<locked>> | 96% | 34,490 psi | 69% | 1726 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 30,168 psi | 60% | 1617 fps | 96.2% |
| Lovex D060 | <<locked>> | 80% | 37,536 psi | 75% | 1732 fps | 96.6% |
| Lovex D063 | <<locked>> | 80% | 36,419 psi | 73% | 1713 fps | 97% |
| Lovex S053 | <<locked>> | 80% | 29,269 psi | 59% | 1611 fps | 98.9% |
| Norma 200 | <<locked>> | 94% | 31,937 psi | 64% | 1745 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,436 psi | 41% | 1001 fps | 100% |
| ReloadSwiss RS 36 | 21.5 gr | 80% | 28,776 psi | 58% | 1627 fps | 95.5% |
| Shooters World Blackout | <<locked>> | 80% | 40,654 psi | 81% | 1778 fps | 97.5% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 37,536 psi | 75% | 1732 fps | 96.6% |
| Shooters World SOCOM | <<locked>> | 80% | 36,419 psi | 73% | 1713 fps | 97% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,920 psi | 56% | 1516 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 34,606 psi | 69% | 1654 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,511 psi | 47% | 1542 fps | 96.2% |
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 21 powders for .360 Buckhammer loaded with the .358 | 250gr | Speer Grand Slam. ADI AR 2207 delivers the highest muzzle velocity at 1,880 fps; across all powders the maximum-charge window runs from 1,096 fps to 1,880 fps. ADI AR 2207 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (345 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.358" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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 36, ADI AR 2207, Alliant Reloder-7 rank at the top here: for .360 Buckhammer with the .358 | 250gr | Speer Grand Slam 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.