Load Specifications
Load data in caliber 10.3 x 60 R Swiss with .416 | 325gr | NorthFork Bonded Core bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 4064 and Accurate 2495.
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>> | 84% | 34,824 psi | 89% | 2096 fps | 99.4% |
| Accurate 2460 | <<locked>> | 82% | 34,998 psi | 89% | 2119 fps | 97.1% |
| Accurate 2495 | <<locked>> | 92% | 34,389 psi | 88% | 2159 fps | 99.6% |
| Accurate 2520 | <<locked>> | 86% | 34,766 psi | 89% | 2152 fps | 96.7% |
| Accurate 4064 | <<locked>> | 94% | 34,476 psi | 88% | 2175 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 86% | 33,968 psi | 87% | 2156 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,054 psi | 84% | 1391 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 34,490 psi | 88% | 2178 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 88% | 33,185 psi | 85% | 2136 fps | 96.1% |
| Norma 202 | <<locked>> | 88% | 35,128 psi | 90% | 2142 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,011 psi | 84% | 1424 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 34,751 psi | 89% | 2096 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 88% | 33,185 psi | 85% | 2136 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 33,634 psi | 86% | 2031 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 34,548 psi | 88% | 2070 fps | 98.1% |
| Somchem S335 | <<locked>> | 86% | 34,708 psi | 89% | 2073 fps | 98% |
| Vihtavuori N133 | <<locked>> | 86% | 35,331 psi | 90% | 2080 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 90% | 33,446 psi | 85% | 2123 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 90% | 35,404 psi | 90% | 2129 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 90% | 34,011 psi | 87% | 2119 fps | 96.9% |
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% | 30,676 psi | 78% | 2014 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 32,677 psi | 83% | 2073 fps | 96.4% |
| Accurate 2495 | 50.5 gr | 80% | 23,221 psi | 59% | 1906 fps | 96.4% |
| Accurate 2520 | <<locked>> | 82% | 30,342 psi | 77% | 2064 fps | 95.1% |
| Accurate 4064 | 54.3 gr | 86% | 26,731 psi | 68% | 2008 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 28,181 psi | 72% | 2031 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,352 psi | 62% | 1240 fps | 100% |
| IMR 3031 | 49.9 gr | 80% | 26,919 psi | 69% | 2005 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 86% | 31,082 psi | 79% | 2093 fps | 95.4% |
| Norma 202 | <<locked>> | 82% | 29,109 psi | 74% | 2014 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,265 psi | 62% | 1270 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 30,995 psi | 79% | 2014 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 31,082 psi | 79% | 2093 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,660 psi | 76% | 1949 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 27,166 psi | 69% | 1913 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 28,950 psi | 74% | 1955 fps | 96.2% |
| Vihtavuori N133 | <<locked>> | 80% | 29,399 psi | 75% | 1962 fps | 98.1% |
| Vihtavuori N135 | <<locked>> | 80% | 24,598 psi | 63% | 1919 fps | 96.7% |
| Vihtavuori N140 | <<locked>> | 82% | 27,673 psi | 71% | 1962 fps | 95% |
| Vihtavuori N540 | <<locked>> | 86% | 29,936 psi | 76% | 2031 fps | 95.4% |
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 57 powders for 10.3 x 60 R Swiss loaded with the .416 | 325gr | NorthFork Bonded Core. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,198 fps; across all powders the maximum-charge window runs from 1,391 fps to 2,198 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 84–90 %, leaving at least 10 % headroom. The 325.0 gr projectile in 0.416" calls for a 1:23.0 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. IMR 3031, Accurate 4064, Accurate 2495 rank at the top here: for 10.3 x 60 R Swiss with the .416 | 325gr | NorthFork Bonded Core 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.