Load Specifications
Load data in caliber 7.63 Mauser with .309 | 120gr | LEE Mold C309-120-R bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AP 100, Rottweil P 806 and Alliant Herco.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 5.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 72% | 32,213 psi | 85% | 1171 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 33,982 psi | 90% | 1335 fps | 91.9% |
| Accurate Solo 1000² | <<locked>> | 72% | 31,821 psi | 84% | 1079 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 80% | 33,779 psi | 90% | 1155 fps | 100% |
| ADI AP 100 | <<locked>> | 92% | 30,966 psi | 82% | 1240 fps | 97.9% |
| ADI AP 70N² | <<locked>> | 64% | 31,415 psi | 83% | 1145 fps | 100% |
| ADI APS 350² | <<locked>> | 68% | 31,821 psi | 84% | 981 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 33,141 psi | 88% | 1027 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 30,632 psi | 81% | 1040 fps | 100% |
| ADI AS 50N² | <<locked>> | 72% | 33,330 psi | 88% | 1112 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 31,734 psi | 84% | 1125 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 32,271 psi | 86% | 1296 fps | 89.8% |
| Alliant BULLSEYE² | <<locked>> | 68% | 32,909 psi | 87% | 1207 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 31,517 psi | 84% | 1096 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 32,184 psi | 85% | 1207 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 30,313 psi | 80% | 1266 fps | 97.2% |
| Alliant RED DOT² | <<locked>> | 76% | 32,619 psi | 87% | 1083 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 33,025 psi | 88% | 1214 fps | 100% |
| Alliant UNIQUE | <<locked>> | 80% | 33,518 psi | 89% | 1224 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 31,662 psi | 84% | 1083 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 32,126 psi | 85% | 1106 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 30,414 psi | 81% | 1096 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 32,909 psi | 87% | 1024 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 32,866 psi | 87% | 1247 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 15,389 psi | 41% | 833 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 32,706 psi | 87% | 1158 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 33,982 psi | 90% | 1335 fps | 91.9% |
| Lovex S011² | <<locked>> | 64% | 33,547 psi | 89% | 1125 fps | 100% |
| Lovex S020² | <<locked>> | 72% | 33,881 psi | 90% | 1188 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 31,720 psi | 84% | 1129 fps | 100% |
| Maxam CSB 2 | <<locked>> | 80% | 33,924 psi | 90% | 1158 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 32,314 psi | 86% | 1112 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 31,720 psi | 84% | 1086 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 31,749 psi | 84% | 1040 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 32,532 psi | 86% | 1211 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 68% | 32,909 psi | 87% | 1132 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 13,909 psi | 37% | 840 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 33,620 psi | 89% | 1217 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 31,502 psi | 84% | 1283 fps | 93% |
| Rottweil P 801² | <<locked>> | 64% | 32,822 psi | 87% | 1102 fps | 100% |
| Rottweil P 806 | <<locked>> | 88% | 33,837 psi | 90% | 1345 fps | 100% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 33,982 psi | 90% | 1335 fps | 91.9% |
| SNPE Vectan A0 | <<locked>> | 80% | 32,082 psi | 85% | 1165 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 33,170 psi | 88% | 1132 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 32,213 psi | 85% | 1138 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 33,127 psi | 88% | 1027 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 84% | 31,183 psi | 83% | 1207 fps | 99.9% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 30,632 psi | 81% | 1129 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 29,921 psi | 79% | 1273 fps | 98.4% |
| Somchem MP200² | <<locked>> | 72% | 32,764 psi | 87% | 1207 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 31,923 psi | 85% | 1175 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 31,995 psi | 85% | 1270 fps | 95.9% |
| Vihtavuori 3N37 | <<locked>> | 80% | 33,663 psi | 89% | 1257 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 92% | 30,937 psi | 82% | 1266 fps | 93.6% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 32,343 psi | 86% | 1342 fps | 97.7% |
| Vihtavuori N320² | <<locked>> | 68% | 30,501 psi | 81% | 1079 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 28,964 psi | 77% | 1001 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 33,011 psi | 88% | 1161 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 32,300 psi | 86% | 1181 fps | 100% |
| Vihtavuori N350 | <<locked>> | 84% | 31,647 psi | 84% | 1227 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 33,083 psi | 88% | 1168 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 5.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2² | <<locked>> | 60% | 21,944 psi | 58% | 1033 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 25,063 psi | 66% | 1198 fps | 86.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 22,974 psi | 61% | 968 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 19,435 psi | 52% | 968 fps | 100% |
| ADI AP 100*² | 4.6 gr | 64% | 14,286 psi | 38% | 919 fps | 86.4% |
| ADI AP 70N² | <<locked>> | 60% | 27,717 psi | 74% | 1099 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,208 psi | 70% | 915 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,062 psi | 64% | 919 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 22,931 psi | 61% | 945 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 24,337 psi | 65% | 1004 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 20,102 psi | 53% | 974 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 25,686 psi | 68% | 1191 fps | 85.8% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,411 psi | 67% | 1106 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,887 psi | 61% | 984 fps | 100% |
| Alliant Herco² | 3.9 gr | 60% | 13,750 psi | 36% | 892 fps | 98.4% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 18,318 psi | 49% | 1043 fps | 89.9% |
| Alliant RED DOT² | <<locked>> | 60% | 22,089 psi | 59% | 948 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,240 psi | 78% | 1161 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 19,290 psi | 51% | 1014 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 21,843 psi | 58% | 961 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 13,140 psi | 35% | 833 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 23,670 psi | 63% | 1014 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 20,639 psi | 55% | 873 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 27,572 psi | 73% | 1175 fps | 99.1% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 6,411 psi | 17% | 610 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 23,163 psi | 61% | 1037 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 25,063 psi | 66% | 1198 fps | 86.7% |
| Lovex S011² | <<locked>> | 60% | 29,414 psi | 78% | 1079 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 22,611 psi | 60% | 1047 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 18,550 psi | 49% | 948 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 19,609 psi | 52% | 974 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 21,466 psi | 57% | 974 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 22,887 psi | 61% | 978 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,237 psi | 70% | 978 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,007 psi | 74% | 1155 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 26,426 psi | 70% | 1056 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 5,598 psi | 15% | 591 fps | 97.5% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,188 psi | 48% | 1001 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 21,437 psi | 57% | 1109 fps | 86.4% |
| Rottweil P 801² | <<locked>> | 60% | 30,211 psi | 80% | 1073 fps | 100% |
| Rottweil P 806*² | 6.2 gr | 60% | 11,850 psi | 31% | 932 fps | 88.5% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 25,063 psi | 66% | 1198 fps | 86.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 18,652 psi | 49% | 968 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,192 psi | 62% | 1007 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,379 psi | 59% | 1010 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 27,775 psi | 74% | 968 fps | 100% |
| SNPE Vectan BA7 1/2*² | <<locked>> | 60% | 15,635 psi | 41% | 935 fps | 93.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 21,654 psi | 57% | 1007 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 19,392 psi | 51% | 1086 fps | 93.1% |
| Somchem MP200² | <<locked>> | 60% | 22,872 psi | 61% | 1070 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 20,958 psi | 56% | 1017 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 24,468 psi | 65% | 1152 fps | 92.2% |
| Vihtavuori 3N37² | <<locked>> | 60% | 17,912 psi | 48% | 1010 fps | 96.8% |
| Vihtavuori 3N38* | <<locked>> | 80% | 21,596 psi | 57% | 1112 fps | 87.7% |
| Vihtavuori N105*² | <<locked>> | 76% | 15,345 psi | 41% | 1020 fps | 85.2% |
| Vihtavuori N320² | <<locked>> | 60% | 23,917 psi | 63% | 1001 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 11,168 psi | 30% | 738 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,960 psi | 61% | 1037 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 19,972 psi | 53% | 1007 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 15,476 psi | 41% | 951 fps | 95.2% |
| Winchester AutoComp ² | <<locked>> | 60% | 19,102 psi | 51% | 974 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 61 powders for 7.63 Mauser loaded with the .309 | 120gr | LEE Mold C309-120-R. Rottweil P 806 delivers the highest muzzle velocity at 1,345 fps; across all powders the maximum-charge window runs from 833 fps to 1,345 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 22 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 37–90 %, leaving at least 10 % headroom. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N105 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. ADI AP 100, Rottweil P 806, Alliant Herco rank at the top here: for 7.63 Mauser with the .309 | 120gr | LEE Mold C309-120-R they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 7, Alliant BLUE DOT, Lovex D037.1 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate Solo 1000, Accurate Solo 1250 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.