Load Specifications
Load data in caliber 10.3 x 60 R Swiss with .416 | 350gr | Swift A-Frame bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 4064, Vihtavuori N135 and Vihtavuori N540.
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>> | 82% | 35,331 psi | 90% | 2028 fps | 99.8% |
| Accurate 2495 | <<locked>> | 88% | 33,286 psi | 85% | 2057 fps | 99.8% |
| Accurate 2520 | <<locked>> | 82% | 33,170 psi | 85% | 2047 fps | 97.2% |
| Accurate 4064 | <<locked>> | 90% | 33,460 psi | 85% | 2077 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 84% | 34,447 psi | 88% | 2083 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,794 psi | 86% | 2077 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,533 psi | 86% | 1348 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 35,041 psi | 89% | 2113 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 86% | 33,982 psi | 87% | 2077 fps | 97.4% |
| Norma 202 | <<locked>> | 84% | 33,475 psi | 85% | 2037 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,576 psi | 86% | 1381 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 33,953 psi | 87% | 2119 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 82% | 35,346 psi | 90% | 2034 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 33,982 psi | 87% | 2077 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 33,852 psi | 86% | 1965 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 34,766 psi | 89% | 2005 fps | 98.9% |
| Somchem S335 | <<locked>> | 84% | 35,099 psi | 90% | 2008 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 33,620 psi | 86% | 1975 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 88% | 34,301 psi | 88% | 2060 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 86% | 33,692 psi | 86% | 2024 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 94% | 34,650 psi | 88% | 2057 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 88% | 34,461 psi | 88% | 2054 fps | 98% |
| Winchester 748 | <<locked>> | 84% | 34,911 psi | 89% | 2093 fps | 96.7% |
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% | 33,243 psi | 85% | 1988 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 25,628 psi | 65% | 1896 fps | 98.3% |
| Accurate 2520 | <<locked>> | 80% | 31,053 psi | 79% | 2005 fps | 96.5% |
| Accurate 4064 | 51 gr | 80% | 24,323 psi | 62% | 1873 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 30,371 psi | 78% | 2005 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 31,575 psi | 81% | 2031 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,816 psi | 63% | 1201 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,138 psi | 74% | 1988 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 80% | 27,818 psi | 71% | 1946 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 29,588 psi | 76% | 1955 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,801 psi | 63% | 1230 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 31,836 psi | 81% | 2070 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 33,243 psi | 85% | 1991 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 27,818 psi | 71% | 1946 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,894 psi | 81% | 1926 fps | 97.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,802 psi | 66% | 1818 fps | 96.1% |
| Somchem S335 | <<locked>> | 80% | 31,140 psi | 80% | 1932 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 80% | 31,662 psi | 81% | 1936 fps | 99.3% |
| Vihtavuori N135 | 49.3 gr | 80% | 26,716 psi | 68% | 1903 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 80% | 28,050 psi | 72% | 1906 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 92% | 32,576 psi | 83% | 2018 fps | 95.5% |
| Vihtavuori N540 | 53.3 gr | 80% | 26,861 psi | 69% | 1893 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 30,690 psi | 78% | 2005 fps | 95.1% |
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 62 powders for 10.3 x 60 R Swiss loaded with the .416 | 350gr | Swift A-Frame. Hodgdon CFE223 delivers the highest muzzle velocity at 2,123 fps; across all powders the maximum-charge window runs from 1,348 fps to 2,123 fps. Accurate 4350 gives the best case fill at 100 %, and 62 of the 62 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 350.0 gr projectile in 0.416" calls for a 1:24.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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, Vihtavuori N135, Vihtavuori N540 rank at the top here: for 10.3 x 60 R Swiss with the .416 | 350gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2206H, ADI AR 2208 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.