Load Specifications
Load data in caliber 7.63 Mauser with .309 | 115gr | Rim Rock RN 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, SNPE Vectan BA7 1/2 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% | 32,692 psi | 87% | 1198 fps | 100% |
| Accurate No. 7*² | <<locked>> | 76% | 33,663 psi | 89% | 1348 fps | 90.8% |
| Accurate Solo 1000² | <<locked>> | 72% | 32,314 psi | 86% | 1102 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 76% | 31,676 psi | 84% | 1152 fps | 100% |
| ADI AP 100 | <<locked>> | 96% | 33,765 psi | 90% | 1296 fps | 98.2% |
| ADI AP 70N² | <<locked>> | 64% | 32,576 psi | 86% | 1178 fps | 100% |
| ADI APS 350² | <<locked>> | 72% | 33,750 psi | 90% | 1020 fps | 100% |
| ADI APS 450² | <<locked>> | 72% | 33,533 psi | 89% | 1050 fps | 100% |
| ADI AS 30² | <<locked>> | 72% | 31,546 psi | 84% | 1066 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 31,604 psi | 84% | 1109 fps | 100% |
| Alliant BE-86² | <<locked>> | 76% | 32,576 psi | 86% | 1155 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 96% | 32,053 psi | 85% | 1312 fps | 88.7% |
| Alliant BULLSEYE² | <<locked>> | 68% | 32,082 psi | 85% | 1217 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 31,154 psi | 83% | 1109 fps | 100% |
| Alliant Herco | <<locked>> | 92% | 32,126 psi | 85% | 1224 fps | 100% |
| Alliant POWER PISTOL² | <<locked>> | 76% | 30,980 psi | 82% | 1296 fps | 96.8% |
| Alliant RED DOT² | <<locked>> | 76% | 33,533 psi | 89% | 1109 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 64% | 33,489 psi | 89% | 1240 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 76% | 30,777 psi | 82% | 1211 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 72% | 31,053 psi | 82% | 1096 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 92% | 32,953 psi | 87% | 1135 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 68% | 31,270 psi | 83% | 1122 fps | 100% |
| Hodgdon Clays | <<locked>> | 80% | 32,039 psi | 85% | 1033 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 64% | 32,430 psi | 86% | 1260 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 16,520 psi | 44% | 863 fps | 100% |
| Hodgdon Universal² | <<locked>> | 72% | 33,866 psi | 90% | 1191 fps | 100% |
| Lovex D037.1*² | <<locked>> | 76% | 33,663 psi | 89% | 1348 fps | 90.8% |
| Lovex S011² | <<locked>> | 64% | 34,026 psi | 90% | 1152 fps | 100% |
| Lovex S020² | <<locked>> | 68% | 30,661 psi | 81% | 1171 fps | 100% |
| Maxam CSB 1 | <<locked>> | 80% | 32,430 psi | 86% | 1158 fps | 100% |
| Maxam CSB 2² | <<locked>> | 76% | 32,329 psi | 86% | 1158 fps | 100% |
| Maxam CSB 3² | <<locked>> | 76% | 32,938 psi | 87% | 1142 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 32,300 psi | 86% | 1112 fps | 100% |
| Maxam CSB 5² | <<locked>> | 68% | 32,329 psi | 86% | 1066 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 64% | 31,995 psi | 85% | 1227 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 64% | 30,240 psi | 80% | 1119 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 14,678 psi | 39% | 856 fps | 100% |
| ReloadSwiss RS 20 | <<locked>> | 80% | 32,880 psi | 87% | 1234 fps | 100% |
| ReloadSwiss RS 24* | <<locked>> | 80% | 32,126 psi | 85% | 1312 fps | 92.5% |
| Rottweil P 801² | <<locked>> | 64% | 34,098 psi | 90% | 1132 fps | 100% |
| Rottweil P 806 | <<locked>> | 84% | 29,994 psi | 80% | 1316 fps | 99.7% |
| Shooters World Major Pistol*² | <<locked>> | 76% | 33,663 psi | 89% | 1348 fps | 90.8% |
| SNPE Vectan A0 | <<locked>> | 80% | 32,576 psi | 86% | 1191 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 72% | 32,503 psi | 86% | 1145 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 72% | 31,502 psi | 84% | 1152 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 68% | 33,518 psi | 89% | 1050 fps | 100% |
| SNPE Vectan BA7 1/2 | <<locked>> | 88% | 33,997 psi | 90% | 1263 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 72% | 31,386 psi | 83% | 1155 fps | 100% |
| SNPE Vectan SP 2² | <<locked>> | 72% | 30,966 psi | 82% | 1306 fps | 98.2% |
| Somchem MP200² | <<locked>> | 72% | 33,533 psi | 89% | 1237 fps | 100% |
| Somchem MS200² | <<locked>> | 76% | 32,663 psi | 87% | 1201 fps | 100% |
| Somchem S221² | <<locked>> | 68% | 33,112 psi | 88% | 1302 fps | 95.6% |
| Vihtavuori 3N37 | <<locked>> | 80% | 34,011 psi | 90% | 1286 fps | 100% |
| Vihtavuori 3N38* | <<locked>> | 92% | 32,619 psi | 87% | 1309 fps | 93.5% |
| Vihtavuori N105ᴾ | <<locked>> | 100% | 33,025 psi | 88% | 1371 fps | 97.3% |
| Vihtavuori N320² | <<locked>> | 68% | 30,385 psi | 81% | 1099 fps | 100% |
| Vihtavuori N32C Tin Star | <<locked>> | 96% | 32,314 psi | 86% | 1053 fps | 100% |
| Vihtavuori N330² | <<locked>> | 72% | 31,560 psi | 84% | 1168 fps | 100% |
| Vihtavuori N340² | <<locked>> | 76% | 32,343 psi | 86% | 1204 fps | 100% |
| Vihtavuori N350 | <<locked>> | 80% | 30,618 psi | 81% | 1237 fps | 100% |
| Winchester AutoComp | <<locked>> | 80% | 33,953 psi | 90% | 1198 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% | 22,611 psi | 60% | 1060 fps | 99.9% |
| Accurate No. 7*² | <<locked>> | 68% | 25,135 psi | 67% | 1211 fps | 85.7% |
| Accurate Solo 1000² | <<locked>> | 60% | 23,554 psi | 62% | 991 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 20,218 psi | 54% | 994 fps | 100% |
| ADI AP 100*² | 4.5 gr | 64% | 14,518 psi | 39% | 932 fps | 85.6% |
| ADI AP 70N² | <<locked>> | 60% | 28,906 psi | 77% | 1132 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 26,687 psi | 71% | 938 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 24,526 psi | 65% | 942 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 23,902 psi | 63% | 971 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 25,324 psi | 67% | 1030 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 21,060 psi | 56% | 1001 fps | 100% |
| Alliant BLUE DOT* | <<locked>> | 88% | 26,614 psi | 71% | 1220 fps | 85.4% |
| Alliant BULLSEYE² | <<locked>> | 60% | 25,962 psi | 69% | 1132 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 22,800 psi | 60% | 997 fps | 100% |
| Alliant Herco² | 3.9 gr | 60% | 14,953 psi | 40% | 928 fps | 98.7% |
| Alliant POWER PISTOL*² | <<locked>> | 60% | 19,145 psi | 51% | 1073 fps | 89.7% |
| Alliant RED DOT² | <<locked>> | 60% | 23,119 psi | 61% | 974 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 29,762 psi | 79% | 1191 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 20,407 psi | 54% | 1047 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 22,669 psi | 60% | 988 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 14,199 psi | 38% | 863 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 24,584 psi | 65% | 1040 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 21,219 psi | 56% | 896 fps | 100% |
| Hodgdon HS-6² | <<locked>> | 60% | 28,297 psi | 75% | 1201 fps | 98.9% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 7,614 psi | 20% | 643 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 24,366 psi | 65% | 1066 fps | 100% |
| Lovex D037.1*² | <<locked>> | 68% | 25,135 psi | 67% | 1211 fps | 85.7% |
| Lovex S011² | <<locked>> | 60% | 29,921 psi | 79% | 1106 fps | 100% |
| Lovex S020² | <<locked>> | 60% | 23,583 psi | 63% | 1076 fps | 100% |
| Maxam CSB 1² | <<locked>> | 60% | 19,392 psi | 51% | 974 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 20,842 psi | 55% | 1007 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 22,249 psi | 59% | 1001 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 23,627 psi | 63% | 1004 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 26,919 psi | 71% | 1004 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 60% | 28,689 psi | 76% | 1181 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 26,571 psi | 70% | 1073 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 6,976 psi | 19% | 633 fps | 99.1% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 18,130 psi | 48% | 1014 fps | 100% |
| ReloadSwiss RS 24*² | <<locked>> | 68% | 22,234 psi | 59% | 1142 fps | 86.1% |
| Rottweil P 801² | <<locked>> | 60% | 30,226 psi | 80% | 1089 fps | 100% |
| Rottweil P 806*² | <<locked>> | 60% | 13,358 psi | 35% | 981 fps | 89.9% |
| Shooters World Major Pistol*² | <<locked>> | 68% | 25,135 psi | 67% | 1211 fps | 85.7% |
| SNPE Vectan A0² | <<locked>> | 60% | 19,319 psi | 51% | 991 fps | 99.9% |
| SNPE Vectan A1² | <<locked>> | 60% | 23,859 psi | 63% | 1033 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 22,989 psi | 61% | 1037 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 28,224 psi | 75% | 991 fps | 100% |
| SNPE Vectan BA7 1/2*² | 4.5 gr | 60% | 15,867 psi | 42% | 951 fps | 93.2% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 22,539 psi | 60% | 1033 fps | 100% |
| SNPE Vectan SP 2*² | <<locked>> | 60% | 20,566 psi | 55% | 1122 fps | 93.2% |
| Somchem MP200² | <<locked>> | 60% | 22,843 psi | 61% | 1083 fps | 100% |
| Somchem MS200² | <<locked>> | 60% | 20,900 psi | 55% | 1030 fps | 100% |
| Somchem S221*² | <<locked>> | 60% | 24,831 psi | 66% | 1171 fps | 91.5% |
| Vihtavuori 3N37² | <<locked>> | 60% | 18,521 psi | 49% | 1033 fps | 96.5% |
| Vihtavuori 3N38*² | <<locked>> | 76% | 20,900 psi | 55% | 1109 fps | 86% |
| Vihtavuori N105* | <<locked>> | 80% | 17,637 psi | 47% | 1089 fps | 87.1% |
| Vihtavuori N320² | <<locked>> | 60% | 23,946 psi | 64% | 1017 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 14,576 psi | 39% | 810 fps | 100% |
| Vihtavuori N330² | <<locked>> | 60% | 22,031 psi | 58% | 1040 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 20,276 psi | 54% | 1027 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 16,694 psi | 44% | 991 fps | 95.6% |
| Winchester AutoComp ² | <<locked>> | 60% | 20,088 psi | 53% | 1004 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 | 115gr | Rim Rock RN. Vihtavuori N105 delivers the highest muzzle velocity at 1,371 fps; across all powders the maximum-charge window runs from 856 fps to 1,371 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 19 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 39–90 %, 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, SNPE Vectan BA7 1/2, Alliant Herco rank at the top here: for 7.63 Mauser with the .309 | 115gr | Rim Rock RN 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.