Load Specifications
Load data in caliber .221 Rem. Fireball with .224 | 74gr | RWS Kegelspitz bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-10x, Norma 200 and ADI AR 2207.
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>> | 86% | 40,364 psi | 87% | 2313 fps | 98.2% |
| Accurate 2015ᴾ | <<locked>> | 100% | 37,768 psi | 81% | 2356 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 92% | 41,162 psi | 89% | 2306 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 92% | 41,669 psi | 90% | 2411 fps | 100% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 34,998 psi | 75% | 2359 fps | 98.3% |
| Alliant Reloder-10x | <<locked>> | 98% | 41,669 psi | 90% | 2441 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 90% | 41,553 psi | 90% | 2372 fps | 98.9% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 41,858 psi | 90% | 2343 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,747 psi | 64% | 1476 fps | 100% |
| IMR 4198 | <<locked>> | 96% | 41,872 psi | 90% | 2385 fps | 99.2% |
| IMR 4227 | <<locked>> | 84% | 40,669 psi | 88% | 2306 fps | 99.7% |
| Lovex S053 | <<locked>> | 84% | 39,900 psi | 86% | 2287 fps | 100% |
| Norma 200 | <<locked>> | 94% | 41,655 psi | 90% | 2428 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,066 psi | 65% | 1526 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 39,755 psi | 86% | 2333 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 41,568 psi | 90% | 2185 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 40,538 psi | 87% | 2392 fps | 96.5% |
| Vihtavuori N120 | <<locked>> | 92% | 41,843 psi | 90% | 2375 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 40,292 psi | 87% | 2352 fps | 98.1% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 37,173 psi | 80% | 2297 fps | 96.2% |
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>> | 80% | 33,272 psi | 72% | 2182 fps | 96.4% |
| Accurate 2015 | <<locked>> | 96% | 32,793 psi | 71% | 2257 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 90% | 38,856 psi | 84% | 2267 fps | 95.1% |
| ADI AR 2207 | 12.1 gr | 80% | 28,790 psi | 62% | 2165 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 92% | 27,818 psi | 60% | 2185 fps | 95.4% |
| Alliant Reloder-10x | 13.1 gr | 86% | 28,413 psi | 61% | 2175 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 80% | 30,400 psi | 66% | 2156 fps | 96.2% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 38,914 psi | 84% | 2297 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,350 psi | 48% | 1332 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 28,427 psi | 61% | 2106 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 35,998 psi | 78% | 2224 fps | 99.2% |
| Lovex S053 | <<locked>> | 80% | 35,447 psi | 76% | 2208 fps | 100% |
| Norma 200 | 12.7 gr | 80% | 26,977 psi | 58% | 2126 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,466 psi | 46% | 1348 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 35,331 psi | 76% | 2254 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 33,257 psi | 72% | 2057 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 36,027 psi | 78% | 2306 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 29,080 psi | 63% | 2142 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 88% | 30,008 psi | 65% | 2152 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 98% | 35,099 psi | 76% | 2257 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 20 powders for .221 Rem. Fireball loaded with the .224 | 74gr | RWS Kegelspitz. Alliant Reloder-10x delivers the highest muzzle velocity at 2,441 fps; across all powders the maximum-charge window runs from 1,476 fps to 2,441 fps. Accurate 2015 gives the best case fill at 100 %, and 20 of the 20 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 74.0 gr projectile in 0.224" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Alliant AR-Comp, 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. Alliant Reloder-10x, Norma 200, ADI AR 2207 rank at the top here: for .221 Rem. Fireball with the .224 | 74gr | RWS Kegelspitz 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.