Load Specifications
Load data in caliber .221 Rem. Fireball with .224 | 50gr | Sellier & Bellot FMJ bullet and 12 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 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 11 FS | <<locked>> | 82% | 41,756 psi | 90% | 2838 fps | 98.7% |
| ADI AR 2205 | <<locked>> | 84% | 41,640 psi | 90% | 2753 fps | 99.7% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,510 psi | 89% | 2953 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,978 psi | 60% | 1834 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 39,755 psi | 86% | 2802 fps | 97% |
| Lovex S053 | <<locked>> | 92% | 40,857 psi | 88% | 2838 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,195 psi | 59% | 1870 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 40,944 psi | 88% | 2871 fps | 97.2% |
| Shooters World SOCOM | <<locked>> | 84% | 41,539 psi | 90% | 2818 fps | 96.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 41,945 psi | 90% | 2733 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 40,451 psi | 87% | 2785 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 41,829 psi | 90% | 2913 fps | 99.5% |
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 No. 11 FS | <<locked>> | 80% | 39,624 psi | 85% | 2795 fps | 98.3% |
| ADI AR 2205 | <<locked>> | 80% | 36,724 psi | 79% | 2654 fps | 99.1% |
| ADI AR 2207 | 14.9 gr | 90% | 30,385 psi | 65% | 2690 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,349 psi | 44% | 1640 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 33,620 psi | 72% | 2664 fps | 95.1% |
| Lovex S053 | 12.7 gr | 80% | 28,311 psi | 61% | 2543 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,914 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 36 | 14.9 gr | 86% | 34,127 psi | 74% | 2723 fps | 95.1% |
| Shooters World SOCOM | <<locked>> | 82% | 38,653 psi | 83% | 2759 fps | 95.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,340 psi | 59% | 2434 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,881 psi | 73% | 2654 fps | 100% |
| Vihtavuori N120 | <<locked>> | 86% | 27,688 psi | 60% | 2579 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 12 powders for .221 Rem. Fireball loaded with the .224 | 50gr | Sellier & Bellot FMJ. ADI AR 2207 delivers the highest muzzle velocity at 2,953 fps; across all powders the maximum-charge window runs from 1,834 fps to 2,953 fps. ADI AR 2207 gives the best case fill at 100 %, and 12 of the 12 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. The 50.0 gr projectile in 0.224" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, 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. ReloadSwiss RS 36, ADI AR 2207, Lovex S053 rank at the top here: for .221 Rem. Fireball with the .224 | 50gr | Sellier & Bellot FMJ 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.