Load Specifications
Load data in caliber 9 x 21 with .358 | 148gr | Speer LHBWC bullet and 63 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 Hodgdon Universal.
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% | 26,295 psi | 77% | 958 fps | 97.4% |
| Accurate No. 5*² | <<locked>> | 68% | 28,050 psi | 82% | 1037 fps | 90.7% |
| Accurate Solo 1000 | <<locked>> | 84% | 29,617 psi | 87% | 945 fps | 100% |
| Accurate Solo 1250 | <<locked>> | 92% | 29,994 psi | 88% | 1001 fps | 100% |
| ADI AP 70N² | <<locked>> | 76% | 28,021 psi | 82% | 997 fps | 100% |
| ADI APS 350² | <<locked>> | 76% | 28,210 psi | 83% | 837 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 30,560 psi | 90% | 889 fps | 100% |
| ADI AS 30 | <<locked>> | 84% | 29,138 psi | 85% | 922 fps | 100% |
| ADI AS 50N | <<locked>> | 84% | 30,530 psi | 90% | 974 fps | 100% |
| Alliant BE-86 | <<locked>> | 88% | 28,689 psi | 84% | 984 fps | 100% |
| Alliant BULLSEYE | <<locked>> | 80% | 28,950 psi | 85% | 1030 fps | 99.9% |
| Alliant Green Dot | <<locked>> | 88% | 30,052 psi | 88% | 974 fps | 100% |
| Alliant Hercoᴾ | <<locked>> | 100% | 23,453 psi | 69% | 971 fps | 98.6% |
| Alliant POWER PISTOL* | <<locked>> | 92% | 28,601 psi | 84% | 1079 fps | 88.1% |
| Alliant RED DOT | <<locked>> | 88% | 29,254 psi | 86% | 942 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 72% | 27,992 psi | 82% | 1020 fps | 99.6% |
| Alliant UNIQUE | <<locked>> | 96% | 30,719 psi | 90% | 1070 fps | 99.9% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 27,775 psi | 81% | 935 fps | 100% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 24,076 psi | 71% | 919 fps | 100% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 80% | 27,267 psi | 80% | 958 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 30,501 psi | 89% | 1024 fps | 100% |
| Hodgdon Clays | <<locked>> | 92% | 30,414 psi | 89% | 889 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 29,936 psi | 88% | 984 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 76% | 29,878 psi | 88% | 1053 fps | 93.9% |
| Hodgdon Longshot² | <<locked>> | 72% | 29,356 psi | 86% | 1050 fps | 95.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 9,021 psi | 26% | 636 fps | 99.8% |
| Hodgdon Universal | <<locked>> | 84% | 28,021 psi | 82% | 997 fps | 100% |
| Lovex D036*² | <<locked>> | 68% | 28,007 psi | 82% | 1037 fps | 90.6% |
| Lovex S011² | <<locked>> | 72% | 28,645 psi | 84% | 955 fps | 100% |
| Lovex S020 | <<locked>> | 84% | 29,863 psi | 88% | 1024 fps | 100% |
| Maxam CSB 1 | <<locked>> | 96% | 29,327 psi | 86% | 991 fps | 100% |
| Maxam CSB 2 | <<locked>> | 92% | 28,065 psi | 82% | 1001 fps | 100% |
| Maxam CSB 3 | <<locked>> | 88% | 29,646 psi | 87% | 978 fps | 100% |
| Maxam CSB 4 | <<locked>> | 84% | 28,819 psi | 85% | 951 fps | 100% |
| Maxam CSB 5 | <<locked>> | 80% | 30,197 psi | 89% | 925 fps | 100% |
| Ramshot Silhouette² | <<locked>> | 76% | 29,820 psi | 87% | 1043 fps | 99% |
| Ramshot True Blue² | <<locked>> | 72% | 30,110 psi | 88% | 1053 fps | 95.8% |
| Ramshot Zip² | <<locked>> | 64% | 28,718 psi | 84% | 978 fps | 100% |
| ReloadSwiss RS 12 | <<locked>> | 80% | 28,137 psi | 83% | 991 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 7,948 psi | 23% | 623 fps | 96.4% |
| ReloadSwiss RS 20 | <<locked>> | 96% | 29,022 psi | 85% | 1053 fps | 100% |
| Rottweil P 801² | <<locked>> | 76% | 30,545 psi | 90% | 984 fps | 100% |
| Rottweil P 806*ᴾ | <<locked>> | 100% | 22,162 psi | 65% | 1053 fps | 90.9% |
| Shooters World Auto Pistol*² | <<locked>> | 68% | 28,007 psi | 82% | 1037 fps | 90.6% |
| SNPE Vectan A0 | <<locked>> | 96% | 30,661 psi | 90% | 1017 fps | 99.8% |
| SNPE Vectan A1 | <<locked>> | 80% | 26,861 psi | 79% | 948 fps | 100% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 29,791 psi | 87% | 991 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 30,545 psi | 90% | 889 fps | 100% |
| SNPE Vectan BA7 1/2*ᴾ | <<locked>> | 100% | 28,355 psi | 83% | 1020 fps | 94.2% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 29,588 psi | 87% | 1004 fps | 100% |
| SNPE Vectan SP 2* | <<locked>> | 92% | 30,298 psi | 89% | 1129 fps | 91.6% |
| Somchem MP200 | <<locked>> | 84% | 28,195 psi | 83% | 1020 fps | 99.1% |
| Somchem MS200 | <<locked>> | 88% | 28,514 psi | 84% | 1010 fps | 99.9% |
| Vihtavuori 3N37 | <<locked>> | 92% | 27,122 psi | 80% | 1033 fps | 95% |
| Vihtavuori N310² | <<locked>> | 64% | 27,282 psi | 80% | 873 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 29,907 psi | 88% | 974 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 18,594 psi | 55% | 804 fps | 100% |
| Vihtavuori N330 | <<locked>> | 84% | 27,963 psi | 82% | 1004 fps | 100% |
| Vihtavuori N340 | <<locked>> | 92% | 30,342 psi | 89% | 1033 fps | 99.9% |
| Vihtavuori N350ᴾ | <<locked>> | 100% | 28,892 psi | 85% | 1050 fps | 96% |
| Winchester 231² | <<locked>> | 72% | 30,197 psi | 89% | 994 fps | 100% |
| Winchester 572*² | <<locked>> | 64% | 29,080 psi | 85% | 1050 fps | 94.7% |
| Winchester AutoComp | <<locked>> | 92% | 29,080 psi | 85% | 1007 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% | 14,083 psi | 41% | 761 fps | 88.9% |
| Accurate No. 5*² | <<locked>> | 60% | 20,421 psi | 60% | 922 fps | 85.3% |
| Accurate Solo 1000² | <<locked>> | 60% | 16,172 psi | 47% | 771 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 12,125 psi | 36% | 728 fps | 96.1% |
| ADI AP 70N² | <<locked>> | 60% | 17,056 psi | 50% | 843 fps | 99.6% |
| ADI APS 350² | <<locked>> | 60% | 18,826 psi | 55% | 732 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 17,550 psi | 51% | 741 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 15,418 psi | 45% | 748 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 15,940 psi | 47% | 784 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 11,864 psi | 35% | 732 fps | 98.1% |
| Alliant BULLSEYE² | <<locked>> | 60% | 16,592 psi | 49% | 837 fps | 95.3% |
| Alliant Green Dot² | <<locked>> | 60% | 14,707 psi | 43% | 764 fps | 100% |
| Alliant Herco*² | <<locked>> | 68% | 10,283 psi | 30% | 705 fps | 86.8% |
| Alliant POWER PISTOL* | <<locked>> | 88% | 26,179 psi | 77% | 1047 fps | 86.6% |
| Alliant RED DOT² | <<locked>> | 60% | 14,257 psi | 42% | 741 fps | 100% |
| Alliant Sport Pistol² | <<locked>> | 60% | 19,334 psi | 57% | 889 fps | 96.5% |
| Alliant UNIQUE*² | 3 gr | 60% | 11,516 psi | 34% | 738 fps | 88.8% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 14,156 psi | 42% | 748 fps | 99.8% |
| Baschieri & Pellagri 102 Pistol² | <<locked>> | 60% | 8,122 psi | 24% | 636 fps | 97.2% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 14,620 psi | 43% | 787 fps | 100% |
| Hodgdon CFE Pistol² | <<locked>> | 60% | 22,800 psi | 67% | 932 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 14,243 psi | 42% | 689 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 25,657 psi | 75% | 938 fps | 100% |
| Hodgdon HS-6*² | <<locked>> | 64% | 19,102 psi | 56% | 892 fps | 86.7% |
| Hodgdon Longshot*² | <<locked>> | 60% | 18,550 psi | 54% | 889 fps | 88.6% |
| Hodgdon TrailBoss*² | <<locked>> | 60% | 3,902 psi | 11% | 449 fps | 89.2% |
| Hodgdon Universal² | 3 gr | 60% | 14,170 psi | 42% | 787 fps | 98.4% |
| Lovex D036*² | <<locked>> | 60% | 20,392 psi | 60% | 922 fps | 85.2% |
| Lovex S011² | <<locked>> | 60% | 20,247 psi | 59% | 853 fps | 100% |
| Lovex S020*² | <<locked>> | 60% | 13,895 psi | 41% | 787 fps | 94.7% |
| Maxam CSB 1² | <<locked>> | 60% | 11,632 psi | 34% | 715 fps | 95.6% |
| Maxam CSB 2² | <<locked>> | 60% | 11,023 psi | 32% | 741 fps | 99.2% |
| Maxam CSB 3² | <<locked>> | 60% | 13,648 psi | 40% | 751 fps | 99.7% |
| Maxam CSB 4² | <<locked>> | 60% | 15,635 psi | 46% | 778 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 16,882 psi | 50% | 768 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 60% | 17,506 psi | 51% | 863 fps | 93.1% |
| Ramshot True Blue*² | <<locked>> | 60% | 20,044 psi | 59% | 909 fps | 89.9% |
| Ramshot Zip² | <<locked>> | 60% | 25,947 psi | 76% | 948 fps | 100% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 14,460 psi | 42% | 807 fps | 100% |
| ReloadSwiss RS 14*² | <<locked>> | 72% | 4,322 psi | 13% | 479 fps | 85.8% |
| ReloadSwiss RS 20*² | 3.1 gr | 60% | 10,124 psi | 30% | 709 fps | 88.6% |
| Rottweil P 801² | <<locked>> | 60% | 18,391 psi | 54% | 843 fps | 100% |
| Rottweil P 806* | <<locked>> | 92% | 16,940 psi | 50% | 961 fps | 86% |
| Shooters World Auto Pistol*² | <<locked>> | 60% | 20,392 psi | 60% | 922 fps | 85.2% |
| SNPE Vectan A0*² | <<locked>> | 60% | 11,821 psi | 35% | 709 fps | 88.7% |
| SNPE Vectan A1² | <<locked>> | 60% | 15,853 psi | 47% | 791 fps | 99.5% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 15,156 psi | 44% | 781 fps | 96.8% |
| SNPE Vectan BA10² | <<locked>> | 60% | 20,102 psi | 59% | 774 fps | 100% |
| SNPE Vectan BA7 1/2* | <<locked>> | 80% | 17,216 psi | 51% | 846 fps | 86.3% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 13,576 psi | 40% | 761 fps | 97.1% |
| SNPE Vectan SP 2* | <<locked>> | 80% | 20,813 psi | 61% | 988 fps | 85.2% |
| Somchem MP200*² | <<locked>> | 60% | 14,402 psi | 42% | 794 fps | 91% |
| Somchem MS200*² | <<locked>> | 60% | 13,387 psi | 39% | 761 fps | 92.5% |
| Vihtavuori 3N37*² | <<locked>> | 72% | 15,040 psi | 44% | 830 fps | 85.5% |
| Vihtavuori N310² | <<locked>> | 60% | 25,541 psi | 75% | 853 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 14,765 psi | 43% | 781 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 6,280 psi | 18% | 561 fps | 99.7% |
| Vihtavuori N330² | <<locked>> | 60% | 13,431 psi | 39% | 791 fps | 98.7% |
| Vihtavuori N340*² | <<locked>> | 60% | 12,328 psi | 36% | 745 fps | 90.5% |
| Vihtavuori N350*² | <<locked>> | 76% | 14,982 psi | 44% | 827 fps | 85.7% |
| Winchester 231² | <<locked>> | 60% | 19,711 psi | 58% | 863 fps | 100% |
| Winchester 572*² | <<locked>> | 60% | 24,105 psi | 71% | 981 fps | 92% |
| Winchester AutoComp *² | <<locked>> | 60% | 11,516 psi | 34% | 725 fps | 94.2% |
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 63 powders for 9 x 21 loaded with the .358 | 148gr | Speer LHBWC. SNPE Vectan SP 2 delivers the highest muzzle velocity at 1,129 fps; across all powders the maximum-charge window runs from 623 fps to 1,129 fps. Alliant Herco gives the best case fill at 100 %, and 44 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (235 MPa), the top charges use 23–90 %, 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, Hodgdon Universal rank at the top here: for 9 x 21 with the .358 | 148gr | Speer LHBWC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 5, Alliant POWER PISTOL, Hodgdon HS-6 burn incompletely and react more sensitively to barrel length and temperature. Accurate No. 2, Accurate No. 5, Accurate Solo 1000 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.