Load Specifications
Load data in caliber .303 Savage with .308 | 110gr | Barnes Solid 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>> | 90% | 33,881 psi | 87% | 2572 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,921 psi | 74% | 1683 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 34,214 psi | 87% | 2474 fps | 96.4% |
| Lovex S053 | <<locked>> | 84% | 35,230 psi | 90% | 2507 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,297 psi | 72% | 1722 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 35,012 psi | 89% | 2536 fps | 96.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 35,244 psi | 90% | 2398 fps | 100% |
| Vihtavuori N120 | <<locked>> | 90% | 34,214 psi | 87% | 2549 fps | 98.8% |
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 | 25.9 gr | 84% | 28,340 psi | 72% | 2428 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,176 psi | 54% | 1506 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 32,198 psi | 82% | 2425 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 31,227 psi | 80% | 2411 fps | 98.5% |
| ReloadSwiss RS 14 | 9.1 gr | 80% | 20,842 psi | 53% | 1542 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 31,183 psi | 80% | 2444 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 29,718 psi | 76% | 2280 fps | 100% |
| Vihtavuori N120 | 24.6 gr | 80% | 25,309 psi | 65% | 2310 fps | 95.6% |
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 | Barnes Solid. ADI AR 2207 delivers the highest muzzle velocity at 2,572 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,572 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 72–90 %, leaving at least 10 % headroom. The 110.0 gr projectile in 0.308" calls for a 1:15.0 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 | Barnes Solid 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.