Load Specifications
Load data in caliber 9 x 21 with .355 | 100gr | Speer JHP bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 20, Alliant UNIQUE and Somchem MS200.
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>> | 80% | 27,920 psi | 82% | 1293 fps | 95.5% |
| Accurate Solo 1000 | <<locked>> | 80% | 28,007 psi | 82% | 1240 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 30,763 psi | 90% | 1342 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 29,907 psi | 88% | 1348 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 29,022 psi | 85% | 1142 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 30,066 psi | 88% | 1191 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 30,023 psi | 88% | 1247 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 29,675 psi | 87% | 1289 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 29,660 psi | 87% | 1322 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 30,443 psi | 89% | 1388 fps | 99.1% |
| Alliant Green Dot | <<locked>> | 84% | 29,211 psi | 86% | 1286 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 25,280 psi | 74% | 1299 fps | 97% |
| Alliant RED DOT | <<locked>> | 84% | 27,876 psi | 82% | 1240 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 28,079 psi | 82% | 1345 fps | 97.9% |
| Alliant UNIQUE | <<locked>> | 92% | 29,936 psi | 88% | 1391 fps | 98.6% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 29,414 psi | 86% | 1273 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 24,990 psi | 73% | 1230 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 28,747 psi | 84% | 1289 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 28,253 psi | 83% | 1322 fps | 99.9% |
| Hodgdon Clays | <<locked>> | 88% | 29,573 psi | 87% | 1184 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 26,832 psi | 79% | 1322 fps | 88.4% |
| Hodgdon Longshot*² | <<locked>> | 72% | 29,588 psi | 87% | 1375 fps | 92.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,399 psi | 31% | 866 fps | 99.2% |
| Hodgdon Universal | <<locked>> | 84% | 29,907 psi | 88% | 1348 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 29,341 psi | 86% | 1286 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 30,647 psi | 90% | 1368 fps | 99.6% |
| Maxam CSB 1 | <<locked>> | 96% | 30,835 psi | 90% | 1339 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 28,950 psi | 85% | 1342 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 29,646 psi | 87% | 1302 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 30,110 psi | 88% | 1293 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 30,661 psi | 90% | 1250 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 29,936 psi | 88% | 1378 fps | 96.9% |
| Ramshot True Blue*² | <<locked>> | 68% | 27,702 psi | 81% | 1335 fps | 91.3% |
| Ramshot Zip² | <<locked>> | 64% | 29,994 psi | 88% | 1322 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 30,124 psi | 88% | 1342 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 9,413 psi | 28% | 850 fps | 95% |
| ReloadSwiss RS 20 | <<locked>> | 92% | 28,007 psi | 82% | 1371 fps | 99.4% |
| Rottweil P 801² | <<locked>> | 72% | 28,369 psi | 83% | 1280 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 24,410 psi | 72% | 1391 fps | 87.5% |
| SNPE Vectan A0 | <<locked>> | 92% | 29,341 psi | 86% | 1325 fps | 98.2% |
| SNPE Vectan A1 | <<locked>> | 80% | 28,558 psi | 84% | 1286 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 30,226 psi | 89% | 1322 fps | 99.9% |
| SNPE Vectan BA10² | <<locked>> | 72% | 28,906 psi | 85% | 1178 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 30,313 psi | 89% | 1365 fps | 91.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 84% | 28,152 psi | 83% | 1309 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 30,124 psi | 88% | 1375 fps | 97.7% |
| Somchem MS200 | <<locked>> | 88% | 29,718 psi | 87% | 1352 fps | 99% |
| Vihtavuori 3N37* | <<locked>> | 92% | 28,732 psi | 84% | 1375 fps | 92.4% |
| Vihtavuori N310² | <<locked>> | 64% | 28,703 psi | 84% | 1191 fps | 100% |
| Vihtavuori N320 | <<locked>> | 80% | 28,137 psi | 83% | 1276 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 19,957 psi | 59% | 1086 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 29,559 psi | 87% | 1355 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 29,109 psi | 85% | 1345 fps | 98.4% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 30,342 psi | 89% | 1398 fps | 93.4% |
| Winchester 231² | <<locked>> | 68% | 27,050 psi | 79% | 1276 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 29,269 psi | 86% | 1378 fps | 91.3% |
| Winchester AutoComp | <<locked>> | 92% | 29,950 psi | 88% | 1342 fps | 100% |
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>> | 60% | 14,939 psi | 44% | 1014 fps | 85.4% |
| Accurate Solo 1000² | <<locked>> | 60% | 17,027 psi | 50% | 1040 fps | 100% |
| Accurate Solo 1250*² | <<locked>> | 60% | 13,271 psi | 39% | 981 fps | 93.8% |
| ADI AP 70N² | <<locked>> | 60% | 18,652 psi | 55% | 1135 fps | 98.5% |
| ADI APS 350² | <<locked>> | 60% | 20,218 psi | 59% | 1007 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 18,956 psi | 56% | 1017 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 16,607 psi | 49% | 1014 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,767 psi | 52% | 1073 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 13,329 psi | 39% | 991 fps | 96.5% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 17,361 psi | 51% | 1112 fps | 92.3% |
| Alliant Green Dot² | <<locked>> | 60% | 16,070 psi | 47% | 1033 fps | 99.8% |
| Alliant Herco*² | <<locked>> | 72% | 13,082 psi | 38% | 997 fps | 86.4% |
| Alliant RED DOT² | <<locked>> | 60% | 15,795 psi | 46% | 1014 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 19,580 psi | 57% | 1168 fps | 93.3% |
| Alliant UNIQUE*² | 4.3 gr | 60% | 13,082 psi | 38% | 997 fps | 86.3% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 15,389 psi | 45% | 1010 fps | 99% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 8,992 psi | 26% | 846 fps | 94.9% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 15,679 psi | 46% | 1053 fps | 99.6% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 24,743 psi | 73% | 1263 fps | 99.4% |
| Hodgdon Clays² | <<locked>> | 60% | 15,592 psi | 46% | 948 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 68% | 23,859 psi | 70% | 1263 fps | 86.3% |
| Hodgdon Longshot*² | <<locked>> | 60% | 19,798 psi | 58% | 1181 fps | 85.3% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,989 psi | 15% | 617 fps | 89.2% |
| Hodgdon Universal² | <<locked>> | 60% | 15,940 psi | 47% | 1066 fps | 97% |
| Lovex S011² | <<locked>> | 60% | 20,595 psi | 60% | 1135 fps | 99.6% |
| Lovex S020*² | <<locked>> | 60% | 14,533 psi | 43% | 1037 fps | 91.3% |
| Maxam CSB 1*² | <<locked>> | 60% | 12,821 psi | 38% | 961 fps | 93.4% |
| Maxam CSB 2² | <<locked>> | 60% | 12,343 psi | 36% | 997 fps | 97.8% |
| Maxam CSB 3² | <<locked>> | 60% | 14,417 psi | 42% | 1004 fps | 98.4% |
| Maxam CSB 4² | <<locked>> | 60% | 16,302 psi | 48% | 1043 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 18,231 psi | 53% | 1050 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 18,347 psi | 54% | 1142 fps | 89.7% |
| Ramshot True Blue*² | <<locked>> | 60% | 20,972 psi | 62% | 1201 fps | 86.4% |
| Ramshot Zip² | <<locked>> | 60% | 26,092 psi | 77% | 1260 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 16,752 psi | 49% | 1106 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 68% | 5,569 psi | 16% | 663 fps | 85.6% |
| ReloadSwiss RS 20*² | 4.5 gr | 60% | 11,560 psi | 34% | 965 fps | 85.9% |
| Rottweil P 801² | <<locked>> | 60% | 20,117 psi | 59% | 1142 fps | 100% |
| Rottweil P 806* | <<locked>> | 96% | 21,683 psi | 64% | 1335 fps | 85.2% |
| SNPE Vectan A0*² | <<locked>> | 60% | 12,937 psi | 38% | 955 fps | 85.8% |
| SNPE Vectan A1² | <<locked>> | 60% | 16,172 psi | 47% | 1043 fps | 97.8% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 15,490 psi | 45% | 1027 fps | 93.9% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,769 psi | 61% | 1050 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 88% | 22,553 psi | 66% | 1224 fps | 86.8% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 14,939 psi | 44% | 1027 fps | 95.1% |
| Somchem MP200*² | <<locked>> | 60% | 15,214 psi | 45% | 1050 fps | 87.4% |
| Somchem MS200*² | 4.4 gr | 60% | 14,504 psi | 43% | 1017 fps | 89.7% |
| Vihtavuori 3N37* | <<locked>> | 80% | 20,813 psi | 61% | 1220 fps | 86.8% |
| Vihtavuori N310² | <<locked>> | 60% | 26,266 psi | 77% | 1158 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 16,056 psi | 47% | 1056 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,745 psi | 23% | 774 fps | 99.4% |
| Vihtavuori N330² | <<locked>> | 60% | 14,257 psi | 42% | 1050 fps | 96.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 13,155 psi | 39% | 988 fps | 87% |
| Vihtavuori N350* | <<locked>> | 84% | 19,711 psi | 58% | 1191 fps | 86.1% |
| Winchester 231² | <<locked>> | 60% | 20,929 psi | 61% | 1165 fps | 99.5% |
| Winchester 572*² | <<locked>> | 60% | 25,831 psi | 76% | 1316 fps | 89.2% |
| Winchester AutoComp *² | <<locked>> | 60% | 12,850 psi | 38% | 974 fps | 91.9% |
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 57 powders for 9 x 21 loaded with the .355 | 100gr | Speer JHP. Vihtavuori N350 delivers the highest muzzle velocity at 1,398 fps; across all powders the maximum-charge window runs from 850 fps to 1,398 fps. Alliant Herco gives the best case fill at 100 %, and 42 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 28–90 %, leaving at least 10 % headroom. Alliant Herco, Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss 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 20, Alliant UNIQUE, Somchem MS200 rank at the top here: for 9 x 21 with the .355 | 100gr | Speer JHP 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.