Load Specifications
Load data in caliber 7 x 33 Sako with .284 | 108gr | Reichenberg Spezial Jagd bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N110, SNPE Vectan BA6 1/2 and ReloadSwiss RS 14.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 90% | 35,520 psi | 87% | 1942 fps | 96.4% |
| Hodgdon LilGun | <<locked>> | 86% | 34,751 psi | 86% | 2106 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 24,337 psi | 60% | 1253 fps | 100% |
| Lovex S040 | <<locked>> | 82% | 34,577 psi | 85% | 1939 fps | 99.4% |
| Lovex S053ᴾ | <<locked>> | 100% | 33,518 psi | 83% | 2005 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,395 psi | 58% | 1283 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 31,734 psi | 78% | 1913 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 35,752 psi | 88% | 2028 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2205 | <<locked>> | 86% | 31,415 psi | 77% | 1867 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 27,876 psi | 69% | 1978 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,666 psi | 44% | 1119 fps | 100% |
| Lovex S040 | <<locked>> | 80% | 33,054 psi | 81% | 1913 fps | 99.2% |
| Lovex S053 | <<locked>> | 98% | 31,488 psi | 78% | 1969 fps | 95.3% |
| ReloadSwiss RS 14 | 4.1 gr | 80% | 17,114 psi | 42% | 1148 fps | 100% |
| SNPE Vectan BA6 1/2 | 9.7 gr | 80% | 18,869 psi | 46% | 1614 fps | 97% |
| Vihtavuori N110 | 10.2 gr | 80% | 22,756 psi | 56% | 1765 fps | 97.3% |
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 11 powders for 7 x 33 Sako loaded with the .284 | 108gr | Reichenberg Spezial Jagd. Hodgdon LilGun delivers the highest muzzle velocity at 2,106 fps; across all powders the maximum-charge window runs from 1,253 fps to 2,106 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 11 of the 11 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 108.0 gr projectile in 0.284" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, Lovex S053, 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. Vihtavuori N110, SNPE Vectan BA6 1/2, ReloadSwiss RS 14 rank at the top here: for 7 x 33 Sako with the .284 | 108gr | Reichenberg Spezial Jagd they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 11 FS, IMR 4227, Vihtavuori N120 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss 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.