Load Specifications
Load data in caliber 9 x 21 with .355 | 115gr | Geco FMJ bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, ReloadSwiss RS 20 and Somchem MP200.
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: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2 | <<locked>> | 88% | 30,574 psi | 90% | 1158 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 88% | 30,037 psi | 88% | 1109 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 96% | 30,618 psi | 90% | 1171 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 29,124 psi | 85% | 1175 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 30,269 psi | 89% | 1004 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 30,110 psi | 88% | 1037 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 30,240 psi | 89% | 1093 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 29,602 psi | 87% | 1125 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 28,660 psi | 84% | 1148 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 29,762 psi | 87% | 1204 fps | 98.8% |
| Alliant Green Dot | <<locked>> | 88% | 29,138 psi | 85% | 1122 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 21,843 psi | 64% | 1083 fps | 95% |
| Alliant RED DOT | <<locked>> | 92% | 30,327 psi | 89% | 1115 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 28,674 psi | 84% | 1188 fps | 97.9% |
| Alliant UNIQUEᴾ | <<locked>> | 100% | 30,763 psi | 90% | 1234 fps | 98.6% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 29,211 psi | 86% | 1109 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 22,249 psi | 65% | 1047 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 28,892 psi | 85% | 1135 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 27,978 psi | 82% | 1155 fps | 99.8% |
| Hodgdon Clays | <<locked>> | 92% | 28,529 psi | 84% | 1020 fps | 100% |
| Hodgdon HP38² | <<locked>> | 68% | 30,806 psi | 90% | 1158 fps | 100% |
| Hodgdon HS-6* | <<locked>> | 80% | 30,835 psi | 90% | 1217 fps | 90.2% |
| Hodgdon Longshot*² | <<locked>> | 76% | 29,385 psi | 86% | 1201 fps | 91.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 9,384 psi | 28% | 735 fps | 98.5% |
| Hodgdon Universal | <<locked>> | 88% | 29,124 psi | 85% | 1175 fps | 100% |
| Lovex S011² | <<locked>> | 76% | 30,139 psi | 88% | 1132 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 30,052 psi | 88% | 1188 fps | 99.4% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 29,791 psi | 87% | 1158 fps | 100% |
| Maxam CSB 2ᴾ | <<locked>> | 100% | 29,646 psi | 87% | 1191 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 29,327 psi | 86% | 1135 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 28,979 psi | 85% | 1115 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 27,833 psi | 82% | 1056 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 30,356 psi | 89% | 1211 fps | 96.8% |
| Ramshot True Blue*² | <<locked>> | 72% | 27,905 psi | 82% | 1171 fps | 90.9% |
| Ramshot Zip² | <<locked>> | 64% | 26,977 psi | 79% | 1115 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 28,906 psi | 85% | 1168 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 8,079 psi | 24% | 705 fps | 92.9% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 29,544 psi | 87% | 1227 fps | 99.5% |
| Rottweil P 801² | <<locked>> | 76% | 27,528 psi | 81% | 1115 fps | 100% |
| SNPE Vectan A0ᴾ | <<locked>> | 100% | 30,589 psi | 90% | 1175 fps | 98.2% |
| SNPE Vectan A1 | <<locked>> | 84% | 27,514 psi | 81% | 1112 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 30,110 psi | 88% | 1152 fps | 99.8% |
| SNPE Vectan BA10² | <<locked>> | 76% | 28,631 psi | 84% | 1020 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 26,397 psi | 77% | 1135 fps | 89% |
| SNPE Vectan BA9 1/2 | <<locked>> | 92% | 30,139 psi | 88% | 1171 fps | 100% |
| Somchem MP200 | <<locked>> | 88% | 29,501 psi | 87% | 1194 fps | 97.2% |
| Somchem MS200 | <<locked>> | 92% | 29,022 psi | 85% | 1171 fps | 98.7% |
| Vihtavuori 3N37*ᴾ | <<locked>> | 100% | 30,806 psi | 90% | 1234 fps | 92.9% |
| Vihtavuori N310² | <<locked>> | 68% | 28,776 psi | 84% | 1040 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 28,166 psi | 83% | 1119 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 17,274 psi | 51% | 915 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 28,123 psi | 83% | 1171 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 27,673 psi | 81% | 1155 fps | 97.7% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 25,382 psi | 74% | 1148 fps | 90.2% |
| Winchester 231² | <<locked>> | 72% | 26,977 psi | 79% | 1115 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 29,805 psi | 87% | 1145 fps | 100% |
| Winchester 572*² | <<locked>> | 68% | 29,602 psi | 87% | 1211 fps | 91% |
| Winchester AutoComp | <<locked>> | 96% | 28,819 psi | 85% | 1165 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4.5"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2*² | <<locked>> | 64% | 15,127 psi | 44% | 889 fps | 85.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 15,838 psi | 46% | 886 fps | 99.9% |
| Accurate Solo 1250*² | <<locked>> | 60% | 11,864 psi | 35% | 823 fps | 92% |
| ADI AP 70N² | <<locked>> | 60% | 16,433 psi | 48% | 951 fps | 97.3% |
| ADI APS 350² | <<locked>> | 60% | 18,826 psi | 55% | 856 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 17,303 psi | 51% | 860 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 15,606 psi | 46% | 869 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 15,838 psi | 46% | 899 fps | 99.7% |
| Alliant BE-86*² | <<locked>> | 60% | 11,531 psi | 34% | 823 fps | 94.6% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 15,693 psi | 46% | 938 fps | 90.6% |
| Alliant Green Dot² | <<locked>> | 60% | 14,779 psi | 43% | 879 fps | 99.4% |
| Alliant Herco*² | <<locked>> | 76% | 13,082 psi | 38% | 879 fps | 86.5% |
| Alliant RED DOT² | <<locked>> | 60% | 14,533 psi | 43% | 863 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 17,898 psi | 53% | 988 fps | 91.8% |
| Alliant UNIQUE*² | 3.4 gr | 64% | 12,778 psi | 37% | 873 fps | 85.9% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 13,808 psi | 41% | 850 fps | 98% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 7,890 psi | 23% | 709 fps | 93.1% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 13,532 psi | 40% | 879 fps | 98.7% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 21,422 psi | 63% | 1053 fps | 98.4% |
| Hodgdon Clays² | <<locked>> | 60% | 14,417 psi | 42% | 804 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 24,511 psi | 72% | 1073 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 23,496 psi | 69% | 1102 fps | 85.5% |
| Hodgdon Longshot*² | <<locked>> | 68% | 23,177 psi | 68% | 1102 fps | 87.8% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,699 psi | 14% | 528 fps | 88.1% |
| Hodgdon Universal² | <<locked>> | 60% | 13,996 psi | 41% | 892 fps | 95.4% |
| Lovex S011² | <<locked>> | 60% | 18,985 psi | 56% | 961 fps | 99% |
| Lovex S020*² | <<locked>> | 60% | 13,169 psi | 39% | 876 fps | 89.6% |
| Maxam CSB 1*² | <<locked>> | 60% | 10,849 psi | 32% | 787 fps | 90.6% |
| Maxam CSB 2² | <<locked>> | 60% | 10,153 psi | 30% | 820 fps | 95.7% |
| Maxam CSB 3² | <<locked>> | 60% | 13,373 psi | 39% | 856 fps | 97.7% |
| Maxam CSB 4² | <<locked>> | 60% | 14,272 psi | 42% | 869 fps | 99.6% |
| Maxam CSB 5² | <<locked>> | 60% | 16,462 psi | 48% | 889 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 15,969 psi | 47% | 948 fps | 87% |
| Ramshot True Blue*² | <<locked>> | 64% | 21,045 psi | 62% | 1053 fps | 86.1% |
| Ramshot Zip² | <<locked>> | 60% | 23,511 psi | 69% | 1063 fps | 99.9% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 13,866 psi | 41% | 919 fps | 99.9% |
| ReloadSwiss RS 14*² | <<locked>> | 72% | 5,468 psi | 16% | 581 fps | 85.4% |
| ReloadSwiss RS 20*² | 3.6 gr | 64% | 11,603 psi | 34% | 850 fps | 86% |
| Rottweil P 801² | <<locked>> | 60% | 17,434 psi | 51% | 961 fps | 100% |
| SNPE Vectan A0*² | <<locked>> | 64% | 12,836 psi | 38% | 833 fps | 85.4% |
| SNPE Vectan A1² | <<locked>> | 60% | 15,084 psi | 44% | 889 fps | 97% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 14,402 psi | 42% | 873 fps | 92.6% |
| SNPE Vectan BA10² | <<locked>> | 60% | 19,580 psi | 57% | 899 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 92% | 21,698 psi | 64% | 1053 fps | 85.5% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 13,242 psi | 39% | 860 fps | 93.3% |
| Somchem MP200*² | 3.7 gr | 60% | 13,779 psi | 40% | 886 fps | 85.4% |
| Somchem MS200*² | <<locked>> | 60% | 13,068 psi | 38% | 856 fps | 87.6% |
| Vihtavuori 3N37* | <<locked>> | 84% | 20,247 psi | 59% | 1060 fps | 85.9% |
| Vihtavuori N310² | <<locked>> | 60% | 22,669 psi | 67% | 965 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 14,214 psi | 42% | 892 fps | 99.8% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,034 psi | 21% | 659 fps | 98.9% |
| Vihtavuori N330² | <<locked>> | 60% | 12,691 psi | 37% | 886 fps | 95% |
| Vihtavuori N340*² | <<locked>> | 64% | 13,242 psi | 39% | 873 fps | 87% |
| Vihtavuori N350* | <<locked>> | 92% | 21,306 psi | 63% | 1076 fps | 87.2% |
| Winchester 231² | <<locked>> | 60% | 19,319 psi | 57% | 991 fps | 99% |
| Winchester 244² | <<locked>> | 60% | 25,976 psi | 76% | 1093 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 22,060 psi | 65% | 1083 fps | 85.9% |
| Winchester AutoComp *² | <<locked>> | 60% | 11,298 psi | 33% | 814 fps | 89.7% |
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 58 powders for 9 x 21 loaded with the .355 | 115gr | Geco FMJ. Alliant UNIQUE delivers the highest muzzle velocity at 1,234 fps; across all powders the maximum-charge window runs from 705 fps to 1,234 fps. Alliant Herco gives the best case fill at 100 %, and 45 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 24–90 %, leaving at least 10 % headroom. Alliant Herco, Alliant UNIQUE, Baschieri & Pellagri 102 Pistol 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. Alliant UNIQUE, ReloadSwiss RS 20, Somchem MP200 rank at the top here: for 9 x 21 with the .355 | 115gr | Geco FMJ they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon HS-6, Hodgdon Longshot, Ramshot True Blue 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.