Load Specifications
Load data in caliber 9 x 21 with .356 | 100gr | H&N HP HS bullet and 57 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 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>> | 84% | 30,269 psi | 89% | 1316 fps | 96% |
| Accurate Solo 1000 | <<locked>> | 84% | 29,747 psi | 87% | 1257 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 29,559 psi | 87% | 1312 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 28,689 psi | 84% | 1322 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 28,224 psi | 83% | 1122 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 29,515 psi | 87% | 1175 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 29,443 psi | 86% | 1230 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 28,123 psi | 83% | 1257 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 30,821 psi | 90% | 1325 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 29,225 psi | 86% | 1355 fps | 98.6% |
| Alliant Green Dot | <<locked>> | 84% | 28,790 psi | 84% | 1270 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 23,728 psi | 70% | 1260 fps | 95.9% |
| Alliant RED DOT | <<locked>> | 88% | 29,530 psi | 87% | 1253 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 29,994 psi | 88% | 1368 fps | 98.3% |
| Alliant UNIQUE | <<locked>> | 92% | 28,906 psi | 85% | 1365 fps | 98.1% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 28,021 psi | 82% | 1243 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 24,076 psi | 71% | 1211 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 28,152 psi | 83% | 1273 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 64% | 27,354 psi | 80% | 1296 fps | 99.8% |
| Hodgdon Clays | <<locked>> | 88% | 29,080 psi | 85% | 1168 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 30,037 psi | 88% | 1302 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 29,863 psi | 88% | 1365 fps | 89.8% |
| Hodgdon Longshot*² | <<locked>> | 72% | 29,109 psi | 85% | 1355 fps | 91.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,385 psi | 30% | 860 fps | 99% |
| Hodgdon Universal | <<locked>> | 84% | 28,689 psi | 84% | 1322 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 29,037 psi | 85% | 1273 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 29,457 psi | 86% | 1339 fps | 99.3% |
| Maxam CSB 1 | <<locked>> | 96% | 29,689 psi | 87% | 1312 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 27,644 psi | 81% | 1316 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 29,399 psi | 86% | 1289 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 28,572 psi | 84% | 1260 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 30,008 psi | 88% | 1230 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 29,225 psi | 86% | 1352 fps | 96.3% |
| Ramshot True Blue*² | <<locked>> | 72% | 30,748 psi | 90% | 1375 fps | 92.5% |
| Ramshot Zip² | <<locked>> | 64% | 28,848 psi | 85% | 1293 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 28,703 psi | 84% | 1316 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 8,978 psi | 26% | 827 fps | 94% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 28,964 psi | 85% | 1378 fps | 99.4% |
| Rottweil P 801² | <<locked>> | 76% | 30,081 psi | 88% | 1293 fps | 100% |
| SNPE Vectan A0 | <<locked>> | 96% | 30,429 psi | 89% | 1332 fps | 98.2% |
| SNPE Vectan A1 | <<locked>> | 84% | 30,443 psi | 89% | 1306 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 29,327 psi | 86% | 1299 fps | 99.8% |
| SNPE Vectan BA10² | <<locked>> | 76% | 30,705 psi | 90% | 1191 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 29,066 psi | 85% | 1332 fps | 90.6% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 29,994 psi | 88% | 1325 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 28,311 psi | 83% | 1332 fps | 96.7% |
| Somchem MS200 | <<locked>> | 88% | 28,718 psi | 84% | 1322 fps | 98.6% |
| Vihtavuori 3N37* | <<locked>> | 92% | 27,296 psi | 80% | 1335 fps | 91% |
| Vihtavuori N310² | <<locked>> | 64% | 27,847 psi | 82% | 1171 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 30,023 psi | 88% | 1296 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 18,710 psi | 55% | 1060 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 28,239 psi | 83% | 1329 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 28,108 psi | 82% | 1316 fps | 97.8% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 28,819 psi | 85% | 1358 fps | 92.3% |
| Winchester 231² | <<locked>> | 72% | 29,878 psi | 88% | 1309 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 28,514 psi | 84% | 1352 fps | 90.4% |
| Winchester AutoComp | <<locked>> | 92% | 29,182 psi | 86% | 1322 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% | 16,621 psi | 49% | 1050 fps | 86.8% |
| Accurate Solo 1000² | <<locked>> | 60% | 16,331 psi | 48% | 1014 fps | 99.9% |
| Accurate Solo 1250*² | <<locked>> | 60% | 12,734 psi | 37% | 958 fps | 92.8% |
| ADI AP 70N² | <<locked>> | 60% | 18,159 psi | 53% | 1115 fps | 98.1% |
| ADI APS 350² | <<locked>> | 60% | 19,232 psi | 56% | 981 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 18,173 psi | 53% | 994 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 16,592 psi | 49% | 1007 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,071 psi | 50% | 1047 fps | 99.9% |
| Alliant BE-86² | <<locked>> | 60% | 12,923 psi | 38% | 971 fps | 95.8% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 16,882 psi | 50% | 1093 fps | 91.5% |
| Alliant Green Dot² | <<locked>> | 60% | 15,389 psi | 45% | 1007 fps | 99.5% |
| Alliant Herco*² | <<locked>> | 72% | 12,763 psi | 37% | 978 fps | 85.5% |
| Alliant RED DOT² | <<locked>> | 60% | 15,737 psi | 46% | 1007 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 19,174 psi | 56% | 1148 fps | 92.6% |
| Alliant UNIQUE*² | 4.4 gr | 64% | 14,286 psi | 42% | 1030 fps | 87.6% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 14,750 psi | 43% | 988 fps | 98.5% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 8,572 psi | 25% | 827 fps | 93.9% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 14,895 psi | 44% | 1027 fps | 99.2% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 23,801 psi | 70% | 1234 fps | 99% |
| Hodgdon Clays² | <<locked>> | 60% | 14,808 psi | 43% | 925 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 25,947 psi | 76% | 1240 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 25,614 psi | 75% | 1286 fps | 87.1% |
| Hodgdon Longshot*² | <<locked>> | 64% | 21,828 psi | 64% | 1214 fps | 86.6% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,844 psi | 14% | 604 fps | 88.2% |
| Hodgdon Universal² | <<locked>> | 60% | 15,360 psi | 45% | 1043 fps | 96.3% |
| Lovex S011² | <<locked>> | 60% | 20,073 psi | 59% | 1115 fps | 99.3% |
| Lovex S020*² | <<locked>> | 60% | 14,054 psi | 41% | 1014 fps | 90.3% |
| Maxam CSB 1*² | <<locked>> | 60% | 12,314 psi | 36% | 938 fps | 92.3% |
| Maxam CSB 2² | <<locked>> | 60% | 11,734 psi | 34% | 974 fps | 97% |
| Maxam CSB 3² | <<locked>> | 60% | 14,446 psi | 42% | 997 fps | 98.2% |
| Maxam CSB 4² | <<locked>> | 60% | 15,650 psi | 46% | 1020 fps | 99.9% |
| Maxam CSB 5² | <<locked>> | 60% | 18,289 psi | 54% | 1047 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 17,506 psi | 51% | 1109 fps | 88.4% |
| Ramshot True Blue*² | <<locked>> | 60% | 20,305 psi | 60% | 1175 fps | 85.2% |
| Ramshot Zip² | <<locked>> | 60% | 25,802 psi | 76% | 1243 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 16,114 psi | 47% | 1086 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 72% | 5,700 psi | 17% | 666 fps | 85.6% |
| ReloadSwiss RS 20*² | 4.5 gr | 64% | 12,169 psi | 36% | 981 fps | 86.6% |
| Rottweil P 801² | <<locked>> | 60% | 19,508 psi | 57% | 1125 fps | 100% |
| SNPE Vectan A0*² | <<locked>> | 64% | 13,619 psi | 40% | 971 fps | 86.4% |
| SNPE Vectan A1² | <<locked>> | 60% | 15,809 psi | 46% | 1027 fps | 97.3% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 15,084 psi | 44% | 1007 fps | 93.2% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,972 psi | 62% | 1047 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 88% | 21,263 psi | 62% | 1184 fps | 85.1% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 14,417 psi | 42% | 1007 fps | 94.4% |
| Somchem MP200*² | <<locked>> | 60% | 14,837 psi | 44% | 1030 fps | 86.5% |
| Somchem MS200*² | 4.2 gr | 60% | 14,054 psi | 41% | 994 fps | 88.6% |
| Vihtavuori 3N37* | <<locked>> | 84% | 22,307 psi | 65% | 1243 fps | 87.6% |
| Vihtavuori N310² | <<locked>> | 60% | 25,396 psi | 75% | 1138 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 15,345 psi | 45% | 1033 fps | 99.9% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,600 psi | 22% | 764 fps | 99.2% |
| Vihtavuori N330² | <<locked>> | 60% | 13,735 psi | 40% | 1027 fps | 95.7% |
| Vihtavuori N340*² | <<locked>> | 60% | 12,763 psi | 37% | 968 fps | 85.9% |
| Vihtavuori N350* | <<locked>> | 88% | 21,089 psi | 62% | 1211 fps | 86.9% |
| Winchester 231² | <<locked>> | 60% | 20,508 psi | 60% | 1145 fps | 99.3% |
| Winchester 572*² | <<locked>> | 60% | 24,207 psi | 71% | 1270 fps | 87.5% |
| Winchester AutoComp *² | <<locked>> | 60% | 12,459 psi | 37% | 955 fps | 91% |
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 .356 | 100gr | H&N HP HS. ReloadSwiss RS 20 delivers the highest muzzle velocity at 1,378 fps; across all powders the maximum-charge window runs from 827 fps to 1,378 fps. Alliant Herco gives the best case fill at 100 %, and 41 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 26–90 %, 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. Alliant UNIQUE, ReloadSwiss RS 20, Somchem MS200 rank at the top here: for 9 x 21 with the .356 | 100gr | H&N HP HS 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.