Load Specifications
Load data in caliber .221 Rem. Fireball with .224 | 65gr | Reichenberg HDB Universal bullet and 16 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Norma 200 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 41,307 psi | 89% | 2461 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 96% | 41,075 psi | 89% | 2559 fps | 99.7% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,681 psi | 81% | 2513 fps | 96.3% |
| Alliant Reloder-7 | <<locked>> | 94% | 41,249 psi | 89% | 2510 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,225 psi | 63% | 1572 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 39,726 psi | 86% | 2484 fps | 97.5% |
| IMR 4227 | <<locked>> | 88% | 41,017 psi | 88% | 2457 fps | 99% |
| Lovex S053 | <<locked>> | 88% | 40,001 psi | 86% | 2438 fps | 100% |
| Norma 200 | <<locked>> | 98% | 40,712 psi | 88% | 2559 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,631 psi | 62% | 1608 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 40,422 psi | 87% | 2490 fps | 98.8% |
| Shooters World SOCOM | <<locked>> | 82% | 41,945 psi | 90% | 2461 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 92% | 41,046 psi | 88% | 2329 fps | 100% |
| Vihtavuori N110 | <<locked>> | 82% | 39,624 psi | 85% | 2372 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 41,321 psi | 89% | 2523 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 37,594 psi | 81% | 2441 fps | 95.8% |
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 1680 | <<locked>> | 86% | 35,969 psi | 78% | 2362 fps | 95.4% |
| ADI AR 2207 | 11.9 gr | 80% | 25,135 psi | 54% | 2201 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 98% | 35,404 psi | 76% | 2467 fps | 95.6% |
| Alliant Reloder-7 | 13.3 gr | 86% | 32,576 psi | 70% | 2336 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,205 psi | 46% | 1401 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 32,068 psi | 69% | 2320 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 32,706 psi | 70% | 2293 fps | 97.2% |
| Lovex S053 | <<locked>> | 80% | 31,357 psi | 68% | 2270 fps | 99.3% |
| Norma 200 | 14 gr | 90% | 31,357 psi | 68% | 2369 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,885 psi | 45% | 1437 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 31,154 psi | 67% | 2300 fps | 96.5% |
| Shooters World SOCOM | <<locked>> | 80% | 39,494 psi | 85% | 2418 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 30,182 psi | 65% | 2146 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 37,173 psi | 80% | 2333 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 25,483 psi | 55% | 2182 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 98% | 35,404 psi | 76% | 2395 fps | 95.1% |
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 16 powders for .221 Rem. Fireball loaded with the .224 | 65gr | Reichenberg HDB Universal. ADI AR 2207 delivers the highest muzzle velocity at 2,559 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,559 fps. Alliant Reloder-10x gives the best case fill at 100 %, and 16 of the 16 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 65.0 gr projectile in 0.224" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-10x, 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, Norma 200, Alliant Reloder-7 rank at the top here: for .221 Rem. Fireball with the .224 | 65gr | Reichenberg HDB Universal 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.