Load Specifications
Load data in caliber 10.3 x 60 R Swiss with .416 | 365gr | Atomic 29 HP bullet and 27 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 4064, Accurate 2495 and Alliant AR-Comp.
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 |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 34,795 psi | 89% | 1932 fps | 99.6% |
| Accurate 2460 | <<locked>> | 84% | 35,070 psi | 90% | 1962 fps | 97.7% |
| Accurate 2495 | <<locked>> | 94% | 33,968 psi | 87% | 1991 fps | 99.7% |
| Accurate 2520 | <<locked>> | 88% | 34,911 psi | 89% | 1995 fps | 97.3% |
| Accurate 4064 | <<locked>> | 96% | 33,997 psi | 87% | 2008 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 88% | 34,287 psi | 88% | 1991 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 84% | 34,983 psi | 89% | 1909 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 82% | 34,330 psi | 88% | 1955 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 82% | 34,577 psi | 88% | 1969 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,460 psi | 83% | 1257 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 34,708 psi | 89% | 2014 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 84% | 34,853 psi | 89% | 1959 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 90% | 33,243 psi | 85% | 1978 fps | 96.8% |
| Norma 202 | <<locked>> | 90% | 35,288 psi | 90% | 1982 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,430 psi | 83% | 1289 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 34,156 psi | 87% | 1936 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 86% | 34,621 psi | 88% | 1936 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 33,243 psi | 85% | 1978 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 33,939 psi | 87% | 1880 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 34,795 psi | 89% | 1913 fps | 98.5% |
| Somchem S335 | <<locked>> | 88% | 34,896 psi | 89% | 1919 fps | 98.5% |
| Vihtavuori N130 | <<locked>> | 82% | 34,142 psi | 87% | 1883 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 33,620 psi | 86% | 1886 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 92% | 33,518 psi | 86% | 1962 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 90% | 33,504 psi | 86% | 1932 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 92% | 34,084 psi | 87% | 1959 fps | 97.4% |
| Winchester 748 | <<locked>> | 88% | 34,954 psi | 89% | 1998 fps | 96.1% |
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 |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 28,863 psi | 74% | 1824 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 30,545 psi | 78% | 1877 fps | 96.3% |
| Accurate 2495 | 44.7 gr | 80% | 21,103 psi | 54% | 1719 fps | 96.1% |
| Accurate 2520 | <<locked>> | 84% | 30,327 psi | 77% | 1909 fps | 95.8% |
| Accurate 4064 | 49.1 gr | 88% | 26,107 psi | 67% | 1850 fps | 95.6% |
| Alliant AR-Comp | 44.2 gr | 80% | 26,556 psi | 68% | 1841 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 32,953 psi | 84% | 1870 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 32,213 psi | 82% | 1916 fps | 98% |
| Hodgdon H335 | <<locked>> | 80% | 32,387 psi | 83% | 1926 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,960 psi | 61% | 1122 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 25,324 psi | 65% | 1814 fps | 96.3% |
| Lovex D073.5 | <<locked>> | 82% | 32,547 psi | 83% | 1916 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 86% | 29,022 psi | 74% | 1896 fps | 95.2% |
| Norma 202 | <<locked>> | 82% | 27,311 psi | 70% | 1827 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,859 psi | 61% | 1148 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 31,937 psi | 82% | 1893 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 28,935 psi | 74% | 1824 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 29,022 psi | 74% | 1896 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 28,181 psi | 72% | 1768 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 25,628 psi | 65% | 1732 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 27,354 psi | 70% | 1772 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 80% | 32,227 psi | 82% | 1850 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 80% | 27,978 psi | 71% | 1781 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 80% | 23,090 psi | 59% | 1739 fps | 96.6% |
| Vihtavuori N140 | <<locked>> | 84% | 27,702 psi | 71% | 1818 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 86% | 28,166 psi | 72% | 1844 fps | 95.3% |
| Winchester 748 | <<locked>> | 86% | 32,764 psi | 84% | 1955 fps | 95.3% |
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 63 powders for 10.3 x 60 R Swiss loaded with the .416 | 365gr | Atomic 29 HP. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,037 fps; across all powders the maximum-charge window runs from 1,257 fps to 2,037 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 63 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 83–90 %, leaving at least 10 % headroom. The 365.0 gr projectile in 0.416" calls for a 1:19.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Winchester 6.5 StaBALL 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. Accurate 4064, Accurate 2495, Alliant AR-Comp rank at the top here: for 10.3 x 60 R Swiss with the .416 | 365gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, ADI AR 2208, ADI Benchmark 8208 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.