Load Specifications
Load data in caliber 10.3 x 60 R Swiss with .416 | 347gr | Rim Rock RNFP Gas Check bullet and 31 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 Vihtavuori N135.
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% | 33,344 psi | 85% | 2031 fps | 99.7% |
| Accurate 2495 | <<locked>> | 92% | 35,230 psi | 90% | 2133 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 33,649 psi | 86% | 2096 fps | 97.5% |
| Accurate 4064 | <<locked>> | 94% | 35,433 psi | 90% | 2156 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,230 psi | 90% | 2083 fps | 96% |
| Alliant AR-Comp | <<locked>> | 86% | 35,230 psi | 90% | 2133 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 35,317 psi | 90% | 2152 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 34,577 psi | 88% | 2129 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,851 psi | 84% | 1362 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 33,634 psi | 86% | 2123 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 84% | 35,230 psi | 90% | 2083 fps | 96% |
| Lovex D073.6 | <<locked>> | 88% | 34,664 psi | 89% | 2126 fps | 97.8% |
| Lovex S062 | <<locked>> | 90% | 34,563 psi | 88% | 2090 fps | 96% |
| Norma 202 | <<locked>> | 86% | 34,156 psi | 87% | 2087 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,909 psi | 84% | 1398 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 34,809 psi | 89% | 2178 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 84% | 35,128 psi | 90% | 2073 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 88% | 34,243 psi | 87% | 2064 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 34,664 psi | 89% | 2126 fps | 97.8% |
| Shooters World Precision | <<locked>> | 90% | 34,563 psi | 88% | 2090 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 34,432 psi | 88% | 2014 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,460 psi | 85% | 2018 fps | 98.8% |
| Somchem S321 | <<locked>> | 82% | 34,679 psi | 89% | 2096 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 33,344 psi | 85% | 2014 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 84% | 34,360 psi | 88% | 2024 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 90% | 34,867 psi | 89% | 2106 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 88% | 34,389 psi | 88% | 2073 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 96% | 35,346 psi | 90% | 2106 fps | 96.7% |
| Vihtavuori N530 | <<locked>> | 84% | 34,896 psi | 89% | 2077 fps | 96% |
| Vihtavuori N540 | <<locked>> | 90% | 35,186 psi | 90% | 2106 fps | 98.3% |
| Winchester 748 | <<locked>> | 84% | 33,417 psi | 85% | 2100 fps | 96.4% |
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% | 31,328 psi | 80% | 1991 fps | 99.4% |
| Accurate 2495 | 52.5 gr | 80% | 22,945 psi | 59% | 1873 fps | 97.5% |
| Accurate 2520 | <<locked>> | 80% | 29,109 psi | 74% | 2005 fps | 96% |
| Accurate 4064 | 55.1 gr | 84% | 25,135 psi | 64% | 1936 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 32,895 psi | 84% | 2037 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 28,761 psi | 73% | 2008 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 32,837 psi | 84% | 2106 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 84% | 32,256 psi | 82% | 2083 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,149 psi | 62% | 1214 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 27,485 psi | 70% | 1991 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 32,895 psi | 84% | 2037 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 82% | 27,876 psi | 71% | 1988 fps | 95.4% |
| Lovex S062 | <<locked>> | 88% | 32,401 psi | 83% | 2047 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 27,862 psi | 71% | 1955 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,960 psi | 61% | 1243 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 32,576 psi | 83% | 2126 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 30,879 psi | 79% | 1988 fps | 97% |
| Rottweil R 902 | <<locked>> | 86% | 32,111 psi | 82% | 2021 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 82% | 27,876 psi | 71% | 1988 fps | 95.4% |
| Shooters World Precision | <<locked>> | 88% | 32,401 psi | 83% | 2047 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,298 psi | 77% | 1932 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 24,352 psi | 62% | 1818 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 32,387 psi | 83% | 2051 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 29,341 psi | 75% | 1936 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 80% | 30,269 psi | 77% | 1946 fps | 99.1% |
| Vihtavuori N135 | 50.8 gr | 80% | 24,990 psi | 64% | 1903 fps | 98% |
| Vihtavuori N140 | <<locked>> | 80% | 26,411 psi | 67% | 1906 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 92% | 30,995 psi | 79% | 2021 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 82% | 32,532 psi | 83% | 2028 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 82% | 26,905 psi | 69% | 1932 fps | 95.5% |
| Winchester 748 | <<locked>> | 82% | 31,198 psi | 80% | 2054 fps | 95.6% |
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 64 powders for 10.3 x 60 R Swiss loaded with the .416 | 347gr | Rim Rock RNFP Gas Check. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,178 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,178 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 64 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (270 MPa), the top charges use 76–90 %, leaving at least 10 % headroom. Alliant Reloder-16, 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, Accurate 2495, Vihtavuori N135 rank at the top here: for 10.3 x 60 R Swiss with the .416 | 347gr | Rim Rock RNFP Gas Check they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, ADI AR 2208, Alliant Power Pro 2000-MR 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.