Load Specifications
Load data in caliber .303 Savage with .308 | 110gr | Fox Classic Hunter bullet and 8 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Vihtavuori N120 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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2207 | <<locked>> | 92% | 34,301 psi | 88% | 2589 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,369 psi | 72% | 1677 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 35,259 psi | 90% | 2500 fps | 96.7% |
| Lovex S053 | <<locked>> | 84% | 33,968 psi | 87% | 2484 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,659 psi | 71% | 1713 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 33,866 psi | 86% | 2513 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 33,721 psi | 86% | 2372 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 34,766 psi | 89% | 2562 fps | 98.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| ADI AR 2207 | 25.6 gr | 84% | 26,847 psi | 69% | 2392 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,552 psi | 52% | 1496 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 31,169 psi | 80% | 2405 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 30,023 psi | 77% | 2388 fps | 98.2% |
| ReloadSwiss RS 14 | 9 gr | 80% | 20,131 psi | 51% | 1532 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 31,560 psi | 81% | 2457 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,514 psi | 73% | 2260 fps | 100% |
| Vihtavuori N120 | 25 gr | 82% | 25,701 psi | 66% | 2326 fps | 95.8% |
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 8 powders for .303 Savage loaded with the .308 | 110gr | Fox Classic Hunter. ADI AR 2207 delivers the highest muzzle velocity at 2,589 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,589 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 8 of the 8 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 110.0 gr projectile in 0.308" calls for a 1:14.0 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. ADI AR 2207, Vihtavuori N120, ReloadSwiss RS 14 rank at the top here: for .303 Savage with the .308 | 110gr | Fox Classic Hunter 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.