Load Specifications
Load data in caliber .303 Savage with .310 | 150gr | Rhino Solid Shank bullet and 12 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Alliant Reloder-10x and Vihtavuori N130.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 94% | 34,693 psi | 89% | 2215 fps | 96.4% |
| ADI AR 2207 | <<locked>> | 82% | 33,808 psi | 86% | 2185 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 96% | 34,534 psi | 88% | 2277 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 88% | 33,605 psi | 86% | 2205 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,995 psi | 79% | 1440 fps | 100% |
| IMR 4198 | <<locked>> | 86% | 34,650 psi | 88% | 2172 fps | 98.3% |
| Norma 200 | <<locked>> | 84% | 33,837 psi | 86% | 2198 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,676 psi | 78% | 1473 fps | 100% |
| Vihtavuori N120 | <<locked>> | 82% | 34,069 psi | 87% | 2159 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 34,882 psi | 89% | 2175 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 94% | 34,156 psi | 87% | 2165 fps | 95.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 33,185 psi | 85% | 2228 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 30,734 psi | 78% | 2133 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 31,734 psi | 81% | 2142 fps | 99.6% |
| Alliant AR-Comp | 27 gr | 88% | 27,050 psi | 69% | 2093 fps | 95.8% |
| Alliant Reloder-10x | 24.5 gr | 82% | 27,934 psi | 71% | 2077 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,902 psi | 58% | 1289 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 29,254 psi | 75% | 2051 fps | 96.6% |
| Norma 200 | <<locked>> | 80% | 29,675 psi | 76% | 2106 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,437 psi | 57% | 1312 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 31,981 psi | 82% | 2116 fps | 99.9% |
| Vihtavuori N130 | 25.2 gr | 84% | 29,138 psi | 74% | 2054 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 92% | 32,184 psi | 82% | 2123 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 98% | 31,270 psi | 80% | 2185 fps | 95.2% |
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 35 powders for .303 Savage loaded with the .310 | 150gr | Rhino Solid Shank. Alliant AR-Comp delivers the highest muzzle velocity at 2,277 fps; across all powders the maximum-charge window runs from 1,440 fps to 2,277 fps. Accurate 2495 gives the best case fill at 100 %, and 35 of the 35 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.31" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Hodgdon TrailBoss, IMR 3031 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. Alliant AR-Comp, Alliant Reloder-10x, Vihtavuori N130 rank at the top here: for .303 Savage with the .310 | 150gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate LT-30, Accurate LT-32 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.