Load Specifications
Load data in caliber 10.3 x 60 R Swiss with .416 | 350gr | Peregrine VRG-2 bullet and 32 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% | 33,707 psi | 86% | 2014 fps | 99.7% |
| Accurate 2495 | <<locked>> | 90% | 33,431 psi | 85% | 2080 fps | 99.9% |
| Accurate 2520 | <<locked>> | 84% | 33,968 psi | 87% | 2080 fps | 97.6% |
| Accurate 4064 | <<locked>> | 92% | 33,518 psi | 86% | 2096 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 35,360 psi | 90% | 2064 fps | 95.9% |
| Alliant AR-Comp | <<locked>> | 84% | 33,228 psi | 85% | 2077 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 35,433 psi | 90% | 2133 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 34,737 psi | 89% | 2110 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,924 psi | 84% | 1348 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 33,808 psi | 86% | 2103 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 84% | 35,360 psi | 90% | 2064 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 88% | 34,882 psi | 89% | 2110 fps | 97.8% |
| Lovex S062 | <<locked>> | 90% | 34,708 psi | 89% | 2070 fps | 95.9% |
| Norma 201 | <<locked>> | 86% | 34,374 psi | 88% | 2051 fps | 95.8% |
| Norma 202 | <<locked>> | 86% | 34,374 psi | 88% | 2070 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,054 psi | 84% | 1381 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 34,954 psi | 89% | 2159 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 82% | 33,460 psi | 85% | 2018 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 88% | 34,722 psi | 89% | 2051 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 34,882 psi | 89% | 2110 fps | 97.8% |
| Shooters World Precision | <<locked>> | 90% | 34,708 psi | 89% | 2070 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 34,722 psi | 89% | 1998 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,649 psi | 86% | 1998 fps | 98.8% |
| Somchem S321 | <<locked>> | 82% | 34,998 psi | 89% | 2080 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 33,750 psi | 86% | 2001 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 84% | 34,563 psi | 88% | 2005 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 90% | 35,099 psi | 90% | 2090 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 88% | 34,635 psi | 88% | 2057 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 94% | 33,301 psi | 85% | 2047 fps | 96% |
| Vihtavuori N530 | <<locked>> | 84% | 35,114 psi | 90% | 2057 fps | 96% |
| Vihtavuori N540 | <<locked>> | 90% | 35,375 psi | 90% | 2087 fps | 98.3% |
| Winchester 748 | <<locked>> | 84% | 33,692 psi | 86% | 2087 fps | 96.5% |
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% | 31,662 psi | 81% | 1975 fps | 99.4% |
| Accurate 2495 | 51.4 gr | 80% | 23,525 psi | 60% | 1867 fps | 97.7% |
| Accurate 2520 | <<locked>> | 80% | 29,399 psi | 75% | 1988 fps | 96% |
| Accurate 4064 | 52.7 gr | 82% | 24,004 psi | 61% | 1886 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 82% | 33,185 psi | 85% | 2021 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 29,153 psi | 74% | 1995 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 33,112 psi | 85% | 2090 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 84% | 32,430 psi | 83% | 2064 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,279 psi | 62% | 1201 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 27,746 psi | 71% | 1975 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 33,185 psi | 85% | 2021 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 82% | 28,166 psi | 72% | 1972 fps | 95.5% |
| Lovex S062 | <<locked>> | 88% | 32,692 psi | 83% | 2031 fps | 95.2% |
| Norma 201 | <<locked>> | 84% | 32,227 psi | 82% | 2008 fps | 95% |
| Norma 202 | <<locked>> | 80% | 28,181 psi | 72% | 1942 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,323 psi | 62% | 1234 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 32,692 psi | 83% | 2106 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 31,343 psi | 80% | 1975 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 86% | 32,576 psi | 83% | 2008 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 28,166 psi | 72% | 1972 fps | 95.5% |
| Shooters World Precision | <<locked>> | 88% | 32,692 psi | 83% | 2031 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,516 psi | 78% | 1916 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 24,569 psi | 63% | 1804 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 32,648 psi | 83% | 2037 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 29,718 psi | 76% | 1919 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 80% | 30,443 psi | 78% | 1929 fps | 99.1% |
| Vihtavuori N135 | 49.7 gr | 80% | 25,266 psi | 65% | 1890 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 26,701 psi | 68% | 1893 fps | 96% |
| Vihtavuori N150 | <<locked>> | 92% | 31,212 psi | 80% | 2005 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 82% | 32,866 psi | 84% | 2014 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 27,282 psi | 70% | 1919 fps | 95.6% |
| Winchester 748 | <<locked>> | 82% | 31,459 psi | 80% | 2037 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 62 powders for 10.3 x 60 R Swiss loaded with the .416 | 350gr | Peregrine VRG-2. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,159 fps; across all powders the maximum-charge window runs from 1,348 fps to 2,159 fps. Hodgdon Hybrid 100V 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 77–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.416" calls for a 1:23.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, Hodgdon TrailBoss, Norma URP 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 | 350gr | Peregrine VRG-2 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 Reloder-15 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.