Load Specifications
Load data in caliber 9 x 21 with .356 | 95gr | Rim Rock RN 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 Hodgdon CFE Pistol.
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% | 30,429 psi | 89% | 1365 fps | 95.7% |
| Accurate Solo 1000 | <<locked>> | 84% | 30,429 psi | 89% | 1316 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 29,762 psi | 87% | 1368 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 28,935 psi | 85% | 1375 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 30,835 psi | 90% | 1201 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 29,356 psi | 86% | 1220 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 29,153 psi | 86% | 1273 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 28,790 psi | 84% | 1316 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 28,616 psi | 84% | 1345 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 29,544 psi | 87% | 1411 fps | 98.4% |
| Alliant Green Dot | <<locked>> | 88% | 30,458 psi | 89% | 1342 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 24,337 psi | 71% | 1316 fps | 95.8% |
| Alliant RED DOT | <<locked>> | 88% | 30,400 psi | 89% | 1316 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 30,168 psi | 89% | 1421 fps | 98.1% |
| Alliant UNIQUE | <<locked>> | 92% | 28,877 psi | 85% | 1411 fps | 97.7% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 30,603 psi | 90% | 1329 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 24,018 psi | 70% | 1253 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 27,731 psi | 81% | 1312 fps | 100% |
| Hodgdon CFE Pistol | <<locked>> | 88% | 30,342 psi | 89% | 1385 fps | 100% |
| Hodgdon Clays² | <<locked>> | 76% | 28,674 psi | 84% | 1188 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 29,211 psi | 86% | 1342 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 29,167 psi | 86% | 1398 fps | 88.8% |
| Hodgdon Longshot*² | <<locked>> | 72% | 28,514 psi | 84% | 1391 fps | 90.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 10,037 psi | 29% | 879 fps | 98.5% |
| Hodgdon Universal | <<locked>> | 84% | 28,935 psi | 85% | 1375 fps | 100% |
| Lovex S011² | <<locked>> | 72% | 28,485 psi | 84% | 1312 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 29,501 psi | 87% | 1388 fps | 99.1% |
| Maxam CSB 1 | <<locked>> | 96% | 29,805 psi | 87% | 1362 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 27,789 psi | 82% | 1365 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 28,761 psi | 84% | 1329 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 29,225 psi | 86% | 1316 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 29,718 psi | 87% | 1276 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 28,950 psi | 85% | 1394 fps | 95.8% |
| Ramshot True Blue*² | <<locked>> | 72% | 30,095 psi | 88% | 1411 fps | 91.6% |
| Ramshot Zip² | <<locked>> | 64% | 29,051 psi | 85% | 1345 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 27,963 psi | 82% | 1355 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 9,065 psi | 27% | 860 fps | 93.6% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 28,747 psi | 84% | 1424 fps | 99.2% |
| Rottweil P 801² | <<locked>> | 76% | 30,429 psi | 89% | 1348 fps | 100% |
| SNPE Vectan A0 | <<locked>> | 96% | 30,327 psi | 89% | 1378 fps | 98% |
| SNPE Vectan A1 | <<locked>> | 84% | 30,472 psi | 89% | 1352 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 29,312 psi | 86% | 1345 fps | 99.7% |
| SNPE Vectan BA10² | <<locked>> | 76% | 30,501 psi | 89% | 1234 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 28,485 psi | 84% | 1368 fps | 89.8% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 30,153 psi | 88% | 1378 fps | 100% |
| Somchem MP200 | <<locked>> | 84% | 29,153 psi | 86% | 1394 fps | 96.7% |
| Somchem MS200 | <<locked>> | 88% | 28,703 psi | 84% | 1368 fps | 98.3% |
| Vihtavuori 3N37* | <<locked>> | 96% | 30,313 psi | 89% | 1437 fps | 92.2% |
| Vihtavuori N310² | <<locked>> | 64% | 27,891 psi | 82% | 1217 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 30,530 psi | 90% | 1352 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 19,145 psi | 56% | 1109 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 28,427 psi | 83% | 1378 fps | 100% |
| Vihtavuori N340 | <<locked>> | 88% | 28,079 psi | 82% | 1362 fps | 97.5% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 29,196 psi | 86% | 1414 fps | 91.9% |
| Winchester 231² | <<locked>> | 72% | 29,051 psi | 85% | 1345 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 28,239 psi | 83% | 1394 fps | 89.7% |
| Winchester AutoComp | <<locked>> | 92% | 28,935 psi | 85% | 1368 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% | 16,491 psi | 48% | 1083 fps | 86.2% |
| Accurate Solo 1000² | <<locked>> | 60% | 16,578 psi | 49% | 1060 fps | 99.9% |
| Accurate Solo 1250*² | <<locked>> | 60% | 12,821 psi | 38% | 994 fps | 92.3% |
| ADI AP 70N² | <<locked>> | 60% | 18,043 psi | 53% | 1155 fps | 97.7% |
| ADI APS 350² | <<locked>> | 60% | 19,783 psi | 58% | 1030 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 18,521 psi | 54% | 1040 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 16,114 psi | 47% | 1033 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 17,202 psi | 50% | 1093 fps | 99.8% |
| Alliant BE-86² | <<locked>> | 60% | 12,850 psi | 38% | 1004 fps | 95.3% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 16,853 psi | 49% | 1129 fps | 90.9% |
| Alliant Green Dot² | <<locked>> | 60% | 15,563 psi | 46% | 1050 fps | 99.4% |
| Alliant Herco*² | <<locked>> | 76% | 14,040 psi | 41% | 1056 fps | 86.8% |
| Alliant RED DOT² | <<locked>> | 60% | 15,316 psi | 45% | 1033 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 18,985 psi | 56% | 1184 fps | 92% |
| Alliant UNIQUE*² | 4.6 gr | 64% | 14,199 psi | 42% | 1063 fps | 86.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 14,852 psi | 44% | 1027 fps | 98.2% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 8,644 psi | 25% | 856 fps | 93.5% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 15,098 psi | 44% | 1066 fps | 99% |
| Hodgdon CFE Pistol*² | 4.6 gr | 60% | 13,953 psi | 41% | 1033 fps | 93.1% |
| Hodgdon Clays² | <<locked>> | 60% | 19,899 psi | 58% | 1047 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 26,310 psi | 77% | 1293 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 72% | 25,918 psi | 76% | 1339 fps | 86.8% |
| Hodgdon Longshot*² | <<locked>> | 64% | 21,698 psi | 64% | 1253 fps | 85.9% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 4,844 psi | 14% | 627 fps | 87.5% |
| Hodgdon Universal² | <<locked>> | 60% | 15,360 psi | 45% | 1079 fps | 95.8% |
| Lovex S011² | <<locked>> | 60% | 19,986 psi | 59% | 1155 fps | 99.1% |
| Lovex S020*² | <<locked>> | 60% | 13,982 psi | 41% | 1047 fps | 89.5% |
| Maxam CSB 1*² | <<locked>> | 60% | 11,821 psi | 35% | 958 fps | 91.1% |
| Maxam CSB 2² | <<locked>> | 60% | 11,777 psi | 35% | 1007 fps | 96.6% |
| Maxam CSB 3² | <<locked>> | 60% | 13,938 psi | 41% | 1020 fps | 97.6% |
| Maxam CSB 4² | <<locked>> | 60% | 15,809 psi | 46% | 1060 fps | 99.8% |
| Maxam CSB 5² | <<locked>> | 60% | 17,651 psi | 52% | 1073 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 17,738 psi | 52% | 1155 fps | 88.1% |
| Ramshot True Blue*² | <<locked>> | 64% | 22,945 psi | 67% | 1276 fps | 87% |
| Ramshot Zip² | <<locked>> | 60% | 25,309 psi | 74% | 1283 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 16,012 psi | 47% | 1125 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 76% | 6,150 psi | 18% | 715 fps | 86.5% |
| ReloadSwiss RS 20*² | 4.8 gr | 64% | 12,575 psi | 37% | 1027 fps | 86.6% |
| Rottweil P 801² | <<locked>> | 60% | 19,392 psi | 57% | 1165 fps | 100% |
| SNPE Vectan A0*² | <<locked>> | 64% | 14,127 psi | 41% | 1017 fps | 86.4% |
| SNPE Vectan A1² | <<locked>> | 60% | 15,693 psi | 46% | 1060 fps | 96.9% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 14,997 psi | 44% | 1040 fps | 92.6% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,262 psi | 59% | 1073 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 92% | 23,815 psi | 70% | 1280 fps | 86.7% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 14,446 psi | 42% | 1043 fps | 93.9% |
| Somchem MP200*² | <<locked>> | 60% | 14,663 psi | 43% | 1063 fps | 85.7% |
| Somchem MS200*² | <<locked>> | 60% | 13,474 psi | 40% | 1010 fps | 87.2% |
| Vihtavuori 3N37* | <<locked>> | 84% | 22,075 psi | 65% | 1280 fps | 86.8% |
| Vihtavuori N310² | <<locked>> | 60% | 25,498 psi | 75% | 1181 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 15,447 psi | 45% | 1073 fps | 99.8% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 7,426 psi | 22% | 784 fps | 98.8% |
| Vihtavuori N330² | <<locked>> | 60% | 13,648 psi | 40% | 1060 fps | 95.1% |
| Vihtavuori N340*² | <<locked>> | 60% | 12,720 psi | 37% | 1001 fps | 85.2% |
| Vihtavuori N350* | <<locked>> | 88% | 20,958 psi | 61% | 1250 fps | 86.1% |
| Winchester 231² | <<locked>> | 60% | 20,262 psi | 59% | 1184 fps | 99% |
| Winchester 572*² | <<locked>> | 60% | 24,831 psi | 73% | 1325 fps | 87.4% |
| Winchester AutoComp *² | <<locked>> | 60% | 12,372 psi | 36% | 988 fps | 90.3% |
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 33 powders for 9 x 21 loaded with the .356 | 95gr | Rim Rock RN. Vihtavuori 3N37 delivers the highest muzzle velocity at 1,437 fps; across all powders the maximum-charge window runs from 860 fps to 1,437 fps. Alliant Herco gives the best case fill at 100 %, and 33 of the 33 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 27–90 %, 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, Hodgdon CFE Pistol rank at the top here: for 9 x 21 with the .356 | 95gr | Rim Rock RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ReloadSwiss RS 14, Vihtavuori 3N37 burn incompletely and react more sensitively to barrel length and temperature. Baschieri & Pellagri 102 Pistol, Hodgdon TrailBoss, ReloadSwiss RS 14 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.