Load Specifications
Load data in caliber 9 x 21 with .355 | 124gr | Sellier & Bellot LRN bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant UNIQUE, Somchem MP200 and ReloadSwiss RS 20.
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% | 28,036 psi | 82% | 1096 fps | 96.4% |
| Accurate No. 5*² | <<locked>> | 72% | 29,733 psi | 87% | 1181 fps | 89.1% |
| Accurate Solo 1000 | <<locked>> | 88% | 30,690 psi | 90% | 1083 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 28,384 psi | 83% | 1109 fps | 100% |
| ADI AP 70N | <<locked>> | 80% | 29,080 psi | 85% | 1142 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 27,862 psi | 82% | 945 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 27,934 psi | 82% | 981 fps | 100% |
| ADI AS 30 | <<locked>> | 88% | 30,501 psi | 89% | 1060 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 29,675 psi | 87% | 1093 fps | 100% |
| Alliant BE-86 | <<locked>> | 92% | 28,979 psi | 85% | 1115 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 84% | 30,371 psi | 89% | 1178 fps | 99.5% |
| Alliant Green Dot | <<locked>> | 88% | 29,211 psi | 86% | 1093 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 21,509 psi | 63% | 1056 fps | 96.3% |
| Alliant RED DOT | <<locked>> | 92% | 30,545 psi | 90% | 1083 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 76% | 29,211 psi | 86% | 1165 fps | 99% |
| Alliant UNIQUE | <<locked>> | 96% | 29,602 psi | 87% | 1184 fps | 99.2% |
| Baschieri & Pellagri 100 | <<locked>> | 88% | 29,646 psi | 87% | 1079 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 22,278 psi | 65% | 1014 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 28,979 psi | 85% | 1102 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 28,079 psi | 82% | 1125 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 29,080 psi | 85% | 994 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 28,543 psi | 84% | 1096 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 27,615 psi | 81% | 1145 fps | 90.4% |
| Hodgdon Longshot*² | <<locked>> | 76% | 30,792 psi | 90% | 1191 fps | 94.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 8,717 psi | 26% | 709 fps | 98.7% |
| Hodgdon Universal | <<locked>> | 88% | 29,080 psi | 85% | 1142 fps | 100% |
| Lovex D036*² | <<locked>> | 72% | 29,718 psi | 87% | 1181 fps | 89% |
| Lovex S011² | <<locked>> | 76% | 30,835 psi | 90% | 1106 fps | 100% |
| Lovex S020 | <<locked>> | 88% | 30,516 psi | 90% | 1161 fps | 99.9% |
| Maxam CSB 1ᴾ | <<locked>> | 100% | 30,284 psi | 89% | 1129 fps | 100% |
| Maxam CSB 2 | <<locked>> | 96% | 28,601 psi | 84% | 1142 fps | 100% |
| Maxam CSB 3 | <<locked>> | 92% | 29,878 psi | 88% | 1109 fps | 100% |
| Maxam CSB 4 | <<locked>> | 88% | 29,573 psi | 87% | 1086 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 28,500 psi | 84% | 1030 fps | 100% |
| Ramshot Silhouette | <<locked>> | 80% | 30,763 psi | 90% | 1184 fps | 98% |
| Ramshot True Blue*² | <<locked>> | 72% | 28,065 psi | 82% | 1148 fps | 92.8% |
| Ramshot Zip² | <<locked>> | 64% | 27,369 psi | 80% | 1089 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 29,051 psi | 85% | 1135 fps | 100% |
| ReloadSwiss RS 14*ᴾ | <<locked>> | 100% | 7,107 psi | 21% | 669 fps | 92.5% |
| ReloadSwiss RS 20ᴾ | <<locked>> | 100% | 30,153 psi | 88% | 1201 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 27,499 psi | 81% | 1079 fps | 100% |
| Shooters World Auto Pistol*² | <<locked>> | 72% | 29,718 psi | 87% | 1181 fps | 89% |
| SNPE Vectan A0 | <<locked>> | 96% | 28,558 psi | 84% | 1115 fps | 98.6% |
| SNPE Vectan A1 | <<locked>> | 84% | 29,153 psi | 86% | 1099 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 88% | 30,545 psi | 90% | 1125 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 29,356 psi | 86% | 994 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 26,484 psi | 78% | 1112 fps | 91% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 27,905 psi | 82% | 1109 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 96% | 30,603 psi | 90% | 1263 fps | 89.2% |
| Somchem MP200 | <<locked>> | 88% | 29,646 psi | 87% | 1165 fps | 98.3% |
| Somchem MS200 | <<locked>> | 92% | 29,269 psi | 86% | 1145 fps | 99.4% |
| Vihtavuori 3N37* | <<locked>> | 96% | 28,616 psi | 84% | 1175 fps | 93.6% |
| Vihtavuori N310² | <<locked>> | 68% | 29,457 psi | 86% | 1014 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 28,718 psi | 84% | 1089 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 17,013 psi | 50% | 886 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 28,776 psi | 84% | 1142 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 29,327 psi | 86% | 1145 fps | 99.1% |
| Vihtavuori N350*ᴾ | <<locked>> | 100% | 26,832 psi | 79% | 1142 fps | 93% |
| Winchester 231² | <<locked>> | 72% | 27,369 psi | 80% | 1089 fps | 100% |
| Winchester 244² | <<locked>> | 64% | 30,240 psi | 89% | 1115 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 26,426 psi | 78% | 1135 fps | 91% |
| Winchester AutoComp | <<locked>> | 96% | 28,950 psi | 85% | 1132 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% | 13,431 psi | 39% | 833 fps | 85.1% |
| Accurate No. 5*² | <<locked>> | 68% | 26,353 psi | 77% | 1132 fps | 87% |
| Accurate Solo 1000² | <<locked>> | 60% | 14,997 psi | 44% | 846 fps | 100% |
| Accurate Solo 1250*² | <<locked>> | 60% | 10,936 psi | 32% | 784 fps | 92.4% |
| ADI AP 70N² | <<locked>> | 60% | 15,925 psi | 47% | 925 fps | 98.1% |
| ADI APS 350² | <<locked>> | 60% | 18,028 psi | 53% | 817 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 17,666 psi | 52% | 840 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 14,388 psi | 42% | 827 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 15,519 psi | 46% | 876 fps | 99.9% |
| Alliant BE-86² | <<locked>> | 60% | 11,124 psi | 33% | 801 fps | 95.6% |
| Alliant BULLSEYE*² | <<locked>> | 60% | 15,795 psi | 46% | 919 fps | 92.4% |
| Alliant Green Dot² | <<locked>> | 60% | 13,518 psi | 40% | 833 fps | 99.5% |
| Alliant Herco*² | <<locked>> | 76% | 12,401 psi | 36% | 850 fps | 87.6% |
| Alliant RED DOT² | <<locked>> | 60% | 13,314 psi | 39% | 820 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 60% | 18,057 psi | 53% | 971 fps | 93.6% |
| Alliant UNIQUE*² | 3.5 gr | 64% | 12,241 psi | 36% | 846 fps | 87.2% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 12,836 psi | 38% | 810 fps | 98.3% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 60% | 7,266 psi | 21% | 682 fps | 93.5% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 13,111 psi | 38% | 853 fps | 99.2% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 21,379 psi | 63% | 1027 fps | 99.2% |
| Hodgdon Clays² | <<locked>> | 60% | 13,576 psi | 40% | 768 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 24,758 psi | 73% | 1047 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 68% | 20,784 psi | 61% | 1030 fps | 85.4% |
| Hodgdon Longshot*² | <<locked>> | 64% | 20,392 psi | 60% | 1027 fps | 87.6% |
| Hodgdon TrailBoss*² | <<locked>> | 64% | 3,800 psi | 11% | 495 fps | 85.7% |
| Hodgdon Universal² | <<locked>> | 60% | 13,416 psi | 39% | 866 fps | 96.3% |
| Lovex D036*² | <<locked>> | 68% | 26,368 psi | 77% | 1129 fps | 87% |
| Lovex S011² | <<locked>> | 60% | 19,261 psi | 57% | 942 fps | 99.7% |
| Lovex S020*² | <<locked>> | 60% | 12,125 psi | 36% | 833 fps | 90% |
| Maxam CSB 1*² | <<locked>> | 60% | 10,501 psi | 31% | 768 fps | 91.9% |
| Maxam CSB 2² | <<locked>> | 60% | 9,616 psi | 28% | 794 fps | 96.4% |
| Maxam CSB 3² | <<locked>> | 60% | 12,444 psi | 37% | 817 fps | 98% |
| Maxam CSB 4² | <<locked>> | 60% | 14,272 psi | 42% | 850 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 16,694 psi | 49% | 869 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 15,824 psi | 46% | 925 fps | 88.8% |
| Ramshot True Blue*² | <<locked>> | 60% | 18,507 psi | 54% | 981 fps | 85.8% |
| Ramshot Zip² | <<locked>> | 60% | 23,714 psi | 70% | 1037 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 13,373 psi | 39% | 889 fps | 100% |
| ReloadSwiss RS 14* | <<locked>> | 84% | 5,439 psi | 16% | 597 fps | 87.5% |
| ReloadSwiss RS 20*² | 3.6 gr | 64% | 10,704 psi | 31% | 810 fps | 86.6% |
| Rottweil P 801² | <<locked>> | 60% | 17,085 psi | 50% | 932 fps | 100% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 26,368 psi | 77% | 1129 fps | 87% |
| SNPE Vectan A0*² | <<locked>> | 60% | 11,327 psi | 33% | 781 fps | 85.1% |
| SNPE Vectan A1² | <<locked>> | 60% | 14,185 psi | 42% | 850 fps | 97.4% |
| SNPE Vectan BA 9*² | <<locked>> | 60% | 13,547 psi | 40% | 837 fps | 93.4% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,001 psi | 59% | 876 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 88% | 19,899 psi | 58% | 997 fps | 86.1% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 12,923 psi | 38% | 837 fps | 94.6% |
| SNPE Vectan SP 2* | <<locked>> | 88% | 24,787 psi | 73% | 1175 fps | 85.4% |
| Somchem MP200*² | 3.8 gr | 60% | 13,387 psi | 39% | 863 fps | 87% |
| Somchem MS200*² | <<locked>> | 60% | 12,009 psi | 35% | 814 fps | 88.1% |
| Vihtavuori 3N37* | <<locked>> | 80% | 17,651 psi | 52% | 984 fps | 85.6% |
| Vihtavuori N310² | <<locked>> | 60% | 23,206 psi | 68% | 942 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 13,213 psi | 39% | 850 fps | 99.9% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 5,802 psi | 17% | 614 fps | 98.1% |
| Vihtavuori N330² | <<locked>> | 60% | 11,763 psi | 35% | 843 fps | 95.5% |
| Vihtavuori N340*² | <<locked>> | 60% | 10,907 psi | 32% | 791 fps | 85.3% |
| Vihtavuori N350* | <<locked>> | 84% | 16,998 psi | 50% | 965 fps | 85.1% |
| Winchester 231² | <<locked>> | 60% | 19,406 psi | 57% | 968 fps | 99.6% |
| Winchester 244² | <<locked>> | 60% | 26,281 psi | 77% | 1066 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 23,163 psi | 68% | 1079 fps | 88.8% |
| Winchester AutoComp *² | <<locked>> | 60% | 10,718 psi | 31% | 787 fps | 90.7% |
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 62 powders for 9 x 21 loaded with the .355 | 124gr | Sellier & Bellot LRN. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,263 fps; across all powders the maximum-charge window runs from 669 fps to 1,263 fps. Alliant Herco gives the best case fill at 100 %, and 44 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 21–90 %, 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, Somchem MP200, ReloadSwiss RS 20 rank at the top here: for 9 x 21 with the .355 | 124gr | Sellier & Bellot LRN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, Hodgdon HS-6, Hodgdon Longshot 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.