Load Specifications
Load data in caliber 10.75 x 68 with .423 | 400gr | A-Square LionLoad bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 43,033 psi | 90% | 2037 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 42,177 psi | 88% | 2077 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 41,626 psi | 87% | 2087 fps | 99.9% |
| Accurate 4064 | <<locked>> | 92% | 42,177 psi | 88% | 2106 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 39,871 psi | 83% | 2129 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 86% | 41,916 psi | 88% | 2087 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 92% | 42,975 psi | 90% | 2087 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 41,582 psi | 87% | 2057 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 86% | 42,917 psi | 90% | 2090 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 40,785 psi | 85% | 2149 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 41,568 psi | 87% | 2103 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 90% | 42,482 psi | 89% | 2116 fps | 98% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,495 psi | 87% | 2139 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 41,553 psi | 87% | 2172 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 40,872 psi | 85% | 2087 fps | 97% |
| Bofors RP3 | <<locked>> | 92% | 41,104 psi | 86% | 2110 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 82% | 41,481 psi | 87% | 2018 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,192 psi | 88% | 2116 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 82% | 40,524 psi | 85% | 2129 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 92% | 42,772 psi | 89% | 2113 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 42,148 psi | 88% | 2096 fps | 98.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,623 psi | 79% | 2051 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,091 psi | 90% | 2156 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,200 psi | 71% | 1306 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 40,944 psi | 86% | 2064 fps | 98.5% |
| IMR 3031 | <<locked>> | 86% | 40,799 psi | 85% | 2096 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 42,409 psi | 89% | 2073 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 38,740 psi | 81% | 2090 fps | 96.5% |
| IMR 4895 | <<locked>> | 88% | 40,814 psi | 85% | 2103 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 84% | 41,582 psi | 87% | 2057 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 88% | 42,743 psi | 89% | 2110 fps | 99.9% |
| Lovex S060 | <<locked>> | 86% | 43,018 psi | 90% | 2041 fps | 98.4% |
| Lovex S062 | <<locked>> | 90% | 41,713 psi | 87% | 2077 fps | 99.2% |
| Norma 201 | <<locked>> | 86% | 41,075 psi | 86% | 2054 fps | 99.1% |
| Norma 202 | <<locked>> | 86% | 41,162 psi | 86% | 2064 fps | 100% |
| Norma 203B | <<locked>> | 90% | 41,669 psi | 87% | 2106 fps | 98.3% |
| Norma URPᴾ | <<locked>> | 100% | 40,901 psi | 85% | 2129 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 90% | 41,466 psi | 87% | 2119 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 43,265 psi | 90% | 2116 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 82% | 42,496 psi | 89% | 2057 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,301 psi | 72% | 1335 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 41,307 psi | 86% | 2152 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 41,568 psi | 87% | 2182 fps | 99.9% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 40,422 psi | 84% | 2146 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 84% | 42,554 psi | 89% | 2051 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 41,423 psi | 87% | 2051 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 94% | 41,002 psi | 86% | 2100 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 42,743 psi | 89% | 2110 fps | 99.9% |
| Shooters World Precision | <<locked>> | 90% | 41,713 psi | 87% | 2077 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 42,714 psi | 89% | 2146 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 42,235 psi | 88% | 2073 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 43,149 psi | 90% | 2106 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 40,625 psi | 85% | 1985 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,583 psi | 89% | 2021 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 41,742 psi | 87% | 2080 fps | 99.3% |
| Somchem S335 | <<locked>> | 86% | 42,380 psi | 89% | 2024 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 41,640 psi | 87% | 2073 fps | 98.1% |
| Somchem S355 | <<locked>> | 94% | 42,061 psi | 88% | 2103 fps | 98.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,347 psi | 76% | 2090 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 86% | 43,250 psi | 90% | 2018 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 42,641 psi | 89% | 2073 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 41,452 psi | 87% | 2051 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 42,946 psi | 90% | 2090 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 98% | 40,640 psi | 85% | 2090 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 84% | 41,611 psi | 87% | 2057 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 90% | 42,395 psi | 89% | 2080 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,061 psi | 88% | 2136 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 41,887 psi | 88% | 2083 fps | 98.6% |
| Winchester 748 | <<locked>> | 86% | 43,076 psi | 90% | 2129 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 42,221 psi | 88% | 2110 fps | 98.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 37,942 psi | 79% | 1965 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 30,342 psi | 63% | 1900 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 36,245 psi | 76% | 2005 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 28,747 psi | 60% | 1883 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 34,751 psi | 73% | 2047 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 34,722 psi | 73% | 1969 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 33,649 psi | 70% | 1932 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,666 psi | 77% | 1982 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 35,114 psi | 73% | 1985 fps | 100% |
| Alliant Power Pro 2000-MR | 62.9 gr | 84% | 35,723 psi | 75% | 2057 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 28,413 psi | 59% | 1870 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 82% | 32,851 psi | 69% | 1952 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 36,724 psi | 77% | 2057 fps | 95.5% |
| Alliant Reloder-17 | 64.9 gr | 88% | 32,140 psi | 67% | 1998 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 35,882 psi | 75% | 2005 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 27,441 psi | 57% | 1864 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,015 psi | 82% | 1982 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,403 psi | 72% | 1991 fps | 98.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 37,869 psi | 79% | 2087 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 88% | 37,492 psi | 78% | 2031 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 34,940 psi | 73% | 1978 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 31,343 psi | 65% | 1932 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,111 psi | 65% | 1946 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,251 psi | 53% | 1165 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,707 psi | 70% | 1942 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 33,518 psi | 70% | 1985 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 33,040 psi | 69% | 1916 fps | 95.3% |
| IMR 4831 | <<locked>> | 96% | 34,142 psi | 71% | 2011 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 31,488 psi | 66% | 1939 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 36,666 psi | 77% | 1982 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,605 psi | 68% | 1952 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 35,940 psi | 75% | 1929 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 30,661 psi | 64% | 1886 fps | 96.7% |
| Norma 201 | <<locked>> | 80% | 34,113 psi | 71% | 1939 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 33,982 psi | 71% | 1952 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 30,226 psi | 63% | 1906 fps | 95% |
| Norma URP | <<locked>> | 96% | 36,129 psi | 75% | 2047 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 31,923 psi | 67% | 1949 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,476 psi | 74% | 1991 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,827 psi | 83% | 2014 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,454 psi | 53% | 1194 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 33,736 psi | 70% | 2021 fps | 95.6% |
| ReloadSwiss RS 60 | 59 gr | 80% | 26,600 psi | 56% | 1873 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 37,840 psi | 79% | 2103 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 37,724 psi | 79% | 1978 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,474 psi | 68% | 1903 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 29,530 psi | 62% | 1903 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,605 psi | 68% | 1952 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 30,661 psi | 64% | 1886 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 31,270 psi | 65% | 1942 fps | 95% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 39,320 psi | 82% | 2031 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,417 psi | 70% | 1946 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,969 psi | 75% | 1916 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,312 psi | 61% | 1814 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 39,030 psi | 82% | 2041 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 35,360 psi | 74% | 1919 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 34,084 psi | 71% | 1952 fps | 96.2% |
| Somchem S355 | <<locked>> | 82% | 29,008 psi | 61% | 1873 fps | 95.1% |
| Somchem S365 | <<locked>> | 90% | 26,774 psi | 56% | 1886 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 35,984 psi | 75% | 1916 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,096 psi | 65% | 1900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 32,068 psi | 67% | 1903 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 25,773 psi | 54% | 1788 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 94% | 35,911 psi | 75% | 2011 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 36,434 psi | 76% | 1975 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 30,893 psi | 65% | 1896 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 96% | 36,999 psi | 77% | 2054 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 30,472 psi | 64% | 1880 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 35,230 psi | 74% | 2008 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,387 psi | 68% | 1946 fps | 96.5% |
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 91 powders for 10.75 x 68 loaded with the .423 | 400gr | A-Square LionLoad. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,182 fps; across all powders the maximum-charge window runs from 1,306 fps to 2,182 fps. Accurate 4350 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for 10.75 x 68 with the .423 | 400gr | A-Square LionLoad they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 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.