Load Specifications
Load data in caliber .219 Zipper with .223 | 45gr | Sierra VarmintKing bullet and 9 powders. The key underlying parameters are shown in the table above.
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 2015 | <<locked>> | 90% | 36,811 psi | 89% | 3179 fps | 96.2% |
| Accurate 2495 | <<locked>> | 98% | 36,550 psi | 88% | 3235 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 92% | 35,969 psi | 87% | 3255 fps | 98.5% |
| Alliant Reloder-10x | <<locked>> | 86% | 37,202 psi | 90% | 3225 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,270 psi | 76% | 2241 fps | 100% |
| IMR 4198 | <<locked>> | 84% | 36,738 psi | 89% | 3176 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,082 psi | 75% | 2293 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 35,998 psi | 87% | 3123 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 96% | 35,491 psi | 86% | 3199 fps | 96.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 34,345 psi | 83% | 3117 fps | 95.3% |
| Accurate 2495 | <<locked>> | 96% | 33,924 psi | 82% | 3166 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 84% | 28,007 psi | 68% | 2999 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,792 psi | 74% | 3045 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,829 psi | 55% | 2014 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 32,750 psi | 79% | 3064 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,829 psi | 55% | 2064 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 31,734 psi | 77% | 3002 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 94% | 33,127 psi | 80% | 3130 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 9 powders for .219 Zipper loaded with the .223 | 45gr | Sierra VarmintKing. Alliant AR-Comp delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 2,241 fps to 3,255 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (285 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.