Load Specifications
Load data in caliber .221 Rem. Fireball with .224 | 50gr | Remington V-Max bullet and 11 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, ReloadSwiss RS 36 and Vihtavuori N120.
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 |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 82% | 40,205 psi | 87% | 2736 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 98% | 39,885 psi | 86% | 2930 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,963 psi | 60% | 1844 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 41,220 psi | 89% | 2844 fps | 97.5% |
| Lovex S053 | <<locked>> | 92% | 41,568 psi | 90% | 2861 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,209 psi | 59% | 1880 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 41,539 psi | 90% | 2897 fps | 97.5% |
| Shooters World SOCOM | <<locked>> | 82% | 39,175 psi | 84% | 2782 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 40,524 psi | 87% | 2720 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 41,394 psi | 89% | 2808 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 40,277 psi | 87% | 2897 fps | 99.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 80% | 37,434 psi | 81% | 2684 fps | 99.3% |
| ADI AR 2207 | 14.9 gr | 88% | 29,327 psi | 63% | 2674 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,479 psi | 44% | 1654 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 34,330 psi | 74% | 2694 fps | 95.6% |
| Lovex S053 | <<locked>> | 80% | 29,022 psi | 63% | 2572 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,030 psi | 43% | 1690 fps | 100% |
| ReloadSwiss RS 36 | 15.2 gr | 86% | 34,809 psi | 75% | 2749 fps | 95.6% |
| Shooters World SOCOM | <<locked>> | 80% | 37,188 psi | 80% | 2740 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,615 psi | 60% | 2451 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 34,200 psi | 74% | 2671 fps | 100% |
| Vihtavuori N120 | 14.3 gr | 84% | 26,774 psi | 58% | 2559 fps | 95.5% |
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 11 powders for .221 Rem. Fireball loaded with the .224 | 50gr | Remington V-Max. ADI AR 2207 delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,844 fps to 2,930 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 11 of the 11 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. 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 2207, ReloadSwiss RS 36, Vihtavuori N120 rank at the top here: for .221 Rem. Fireball with the .224 | 50gr | Remington V-Max 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.