Load Specifications
Load data in caliber .17 Rem. Fireball with .172 | 20gr | Impala LWHV LS bullet and 16 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% | 47,311 psi | 86% | 3825 fps | 97.5% |
| Accurate 2015ᴾ | <<locked>> | 100% | 46,456 psi | 84% | 3888 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 92% | 49,327 psi | 90% | 4006 fps | 99.9% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 42,786 psi | 78% | 3907 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 98% | 49,864 psi | 90% | 4022 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 90% | 48,791 psi | 89% | 3930 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,125 psi | 56% | 2631 fps | 100% |
| IMR 4198 | <<locked>> | 96% | 48,138 psi | 87% | 3950 fps | 98.5% |
| IMR 4227 | <<locked>> | 86% | 48,834 psi | 89% | 3914 fps | 99.4% |
| Lovex S053 | <<locked>> | 86% | 47,718 psi | 87% | 3875 fps | 100% |
| Norma 200 | <<locked>> | 92% | 48,312 psi | 88% | 3967 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,777 psi | 56% | 2687 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 49,327 psi | 90% | 3953 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 48,573 psi | 88% | 3717 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 49,269 psi | 89% | 3947 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 48,472 psi | 88% | 3894 fps | 97.6% |
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% | 38,827 psi | 70% | 3615 fps | 95.1% |
| Accurate 2015 | <<locked>> | 98% | 44,063 psi | 80% | 3832 fps | 95.6% |
| ADI AR 2207 | 14 gr | 80% | 34,200 psi | 62% | 3619 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 94% | 35,534 psi | 64% | 3688 fps | 95.3% |
| Alliant Reloder-10x | 15.9 gr | 90% | 39,233 psi | 71% | 3760 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 82% | 38,667 psi | 70% | 3678 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,814 psi | 41% | 2365 fps | 100% |
| IMR 4198 | <<locked>> | 86% | 36,260 psi | 66% | 3629 fps | 95.2% |
| IMR 4227 | <<locked>> | 80% | 40,959 psi | 74% | 3724 fps | 98.1% |
| Lovex S053 | <<locked>> | 80% | 40,248 psi | 73% | 3698 fps | 99.8% |
| Norma 200 | 15.4 gr | 84% | 37,637 psi | 68% | 3691 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,669 psi | 41% | 2418 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 41,017 psi | 74% | 3753 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 37,637 psi | 68% | 3488 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 34,258 psi | 62% | 3579 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 92% | 40,277 psi | 73% | 3698 fps | 95.4% |
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 .17 Rem. Fireball loaded with the .172 | 20gr | Impala LWHV LS. Alliant Reloder-10x delivers the highest muzzle velocity at 4,022 fps; across all powders the maximum-charge window runs from 2,631 fps to 4,022 fps. Accurate 2015 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 (380 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 20.0 gr projectile in 0.172" calls for a 1:6.5 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 .17 Rem. Fireball with the .172 | 20gr | Impala LWHV LS 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.