Load Specifications
Load data in caliber .22 Rem. Jet Mag. with .224 | 55gr | Norma FMJ bullet and 16 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 14 and Hodgdon TrailBoss.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AP 100² | <<locked>> | 68% | 31,575 psi | 85% | 1585 fps | 100% |
| Alliant 2400*² | <<locked>> | 64% | 29,892 psi | 81% | 1617 fps | 88.3% |
| Alliant BLUE DOT² | <<locked>> | 68% | 31,169 psi | 84% | 1627 fps | 95.7% |
| Alliant Herco² | <<locked>> | 68% | 32,561 psi | 88% | 1516 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 72% | 33,156 psi | 90% | 1411 fps | 100% |
| Hodgdon Clays² | <<locked>> | 64% | 30,763 psi | 83% | 1309 fps | 100% |
| Hodgdon LilGun*² | <<locked>> | 76% | 33,112 psi | 90% | 1742 fps | 90.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,992 psi | 73% | 1263 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 64% | 29,196 psi | 79% | 1608 fps | 89% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,454 psi | 69% | 1273 fps | 100% |
| SNPE Vectan BA6 1/2* | <<locked>> | 92% | 32,532 psi | 88% | 1677 fps | 93.6% |
| SNPE Vectan BA7 1/2² | <<locked>> | 64% | 32,996 psi | 89% | 1562 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 68% | 32,648 psi | 88% | 1634 fps | 98.9% |
| Vihtavuori N105² | <<locked>> | 68% | 31,169 psi | 84% | 1631 fps | 99.9% |
| Vihtavuori N110* | <<locked>> | 84% | 32,518 psi | 88% | 1693 fps | 90.4% |
| Vihtavuori N32C Tin Star | <<locked>> | 80% | 31,575 psi | 85% | 1312 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AP 100² | <<locked>> | 60% | 25,005 psi | 68% | 1447 fps | 99.4% |
| Alliant 2400*² | <<locked>> | 60% | 26,353 psi | 71% | 1535 fps | 85.8% |
| Alliant BLUE DOT*² | <<locked>> | 60% | 24,598 psi | 67% | 1476 fps | 92.1% |
| Alliant Herco² | <<locked>> | 60% | 26,527 psi | 72% | 1404 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 25,280 psi | 68% | 1283 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 28,761 psi | 78% | 1273 fps | 100% |
| Hodgdon LilGun*² | <<locked>> | 72% | 28,543 psi | 77% | 1644 fps | 87.3% |
| Hodgdon TrailBoss² | 2.8 gr | 60% | 13,242 psi | 36% | 958 fps | 100% |
| Ramshot Enforcer*² | <<locked>> | 60% | 25,802 psi | 70% | 1532 fps | 86.6% |
| ReloadSwiss RS 14² | 2.8 gr | 60% | 12,589 psi | 34% | 965 fps | 100% |
| SNPE Vectan BA6 1/2*² | <<locked>> | 76% | 21,118 psi | 57% | 1411 fps | 85.1% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 29,472 psi | 80% | 1499 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 26,208 psi | 71% | 1503 fps | 96.8% |
| Vihtavuori N105² | <<locked>> | 60% | 24,511 psi | 66% | 1486 fps | 98.5% |
| Vihtavuori N110*² | <<locked>> | 76% | 25,889 psi | 70% | 1549 fps | 85.9% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 21,321 psi | 58% | 1132 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 16 powders for .22 Rem. Jet Mag. loaded with the .224 | 55gr | Norma FMJ. Hodgdon LilGun delivers the highest muzzle velocity at 1,742 fps; across all powders the maximum-charge window runs from 1,263 fps to 1,742 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 5 of the 16 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (255 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 55.0 gr projectile in 0.224" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. 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 14, Hodgdon TrailBoss rank at the top here: for .22 Rem. Jet Mag. with the .224 | 55gr | Norma FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant 2400, Hodgdon LilGun, Ramshot Enforcer burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.