Load Specifications
Load data in caliber .303 Savage with .308 | 165gr | RWS Kegelspitz bullet and 14 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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 33,997 psi | 87% | 2100 fps | 97.5% |
| Accurate 2495ᴾ | <<locked>> | 100% | 34,200 psi | 87% | 2182 fps | 98% |
| Alliant AR-Comp | <<locked>> | 94% | 35,404 psi | 90% | 2198 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 86% | 34,882 psi | 89% | 2126 fps | 98.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 33,489 psi | 86% | 2028 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,575 psi | 81% | 1378 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 33,837 psi | 86% | 2169 fps | 96.3% |
| IMR 4198 | <<locked>> | 84% | 35,012 psi | 89% | 2080 fps | 99.2% |
| Norma 200 | <<locked>> | 82% | 34,838 psi | 89% | 2110 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,343 psi | 80% | 1411 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 33,417 psi | 85% | 2080 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 86% | 33,518 psi | 86% | 2051 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 92% | 34,795 psi | 89% | 2083 fps | 97.4% |
| Vihtavuori N135 | <<locked>> | 98% | 34,505 psi | 88% | 2159 fps | 97.8% |
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 28,036 psi | 72% | 1975 fps | 95.3% |
| Accurate 2495 | <<locked>> | 92% | 26,150 psi | 67% | 2011 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 23,177 psi | 59% | 1896 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 28,950 psi | 74% | 2001 fps | 97% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 31,662 psi | 81% | 1988 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,395 psi | 60% | 1230 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 31,923 psi | 82% | 2126 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 31,285 psi | 80% | 2005 fps | 98.4% |
| Norma 200 | <<locked>> | 80% | 32,793 psi | 84% | 2070 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,960 psi | 59% | 1257 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 31,459 psi | 80% | 2037 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 28,021 psi | 72% | 1932 fps | 96.3% |
| Vihtavuori N133 | <<locked>> | 86% | 29,138 psi | 74% | 1965 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 92% | 28,558 psi | 73% | 2028 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 14 powders for .303 Savage loaded with the .308 | 165gr | RWS Kegelspitz. Alliant AR-Comp delivers the highest muzzle velocity at 2,198 fps; across all powders the maximum-charge window runs from 1,378 fps to 2,198 fps. Accurate 2495 gives the best case fill at 100 %, and 14 of the 14 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 80–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, 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.