Load Specifications
Load data in caliber 9 x 18 Ultra with .355 | 100gr | Speer JHP bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N330, Maxam CSB 2 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"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2* | <<locked>> | 84% | 23,569 psi | 90% | 1076 fps | 87.5% |
| Accurate Solo 1000 | <<locked>> | 80% | 21,712 psi | 83% | 1030 fps | 99.9% |
| Accurate Solo 1250 | <<locked>> | 92% | 22,249 psi | 85% | 1086 fps | 96.8% |
| ADI AP 70N² | <<locked>> | 76% | 22,278 psi | 85% | 1106 fps | 97.6% |
| ADI APS 350² | <<locked>> | 72% | 22,263 psi | 85% | 948 fps | 100% |
| ADI APS 450² | <<locked>> | 76% | 22,916 psi | 88% | 991 fps | 100% |
| ADI AS 30 | <<locked>> | 80% | 21,335 psi | 82% | 1017 fps | 100% |
| ADI AS 50N | <<locked>> | 80% | 22,394 psi | 86% | 1066 fps | 99.9% |
| Alliant BE-86 | <<locked>> | 92% | 23,482 psi | 90% | 1115 fps | 99.1% |
| Alliant BULLSEYE* | <<locked>> | 80% | 23,134 psi | 89% | 1122 fps | 92.3% |
| Alliant Green Dot | <<locked>> | 84% | 22,046 psi | 84% | 1063 fps | 99.9% |
| Alliant Herco*ᴾ | <<locked>> | 100% | 17,883 psi | 69% | 1027 fps | 87% |
| Alliant RED DOT | <<locked>> | 84% | 21,147 psi | 81% | 1037 fps | 100% |
| Alliant Sport Pistol*² | <<locked>> | 76% | 23,540 psi | 90% | 1129 fps | 91.6% |
| Alliant UNIQUE* | <<locked>> | 96% | 22,974 psi | 88% | 1138 fps | 91.5% |
| Baschieri & Pellagri 100 | <<locked>> | 84% | 22,104 psi | 85% | 1050 fps | 99.3% |
| Baschieri & Pellagri 102 Pistolᴾ | <<locked>> | 100% | 17,550 psi | 67% | 1004 fps | 99.1% |
| Baschieri & Pellagri 103 Pistol | <<locked>> | 84% | 23,250 psi | 89% | 1106 fps | 99.9% |
| Hodgdon CFE Pistol² | <<locked>> | 68% | 22,872 psi | 88% | 1112 fps | 96% |
| Hodgdon Clays | <<locked>> | 84% | 21,553 psi | 83% | 971 fps | 100% |
| Hodgdon HP38² | <<locked>> | 64% | 22,800 psi | 87% | 1083 fps | 98.6% |
| Hodgdon TrailBoss*ᴾ | <<locked>> | 100% | 7,513 psi | 29% | 696 fps | 91.9% |
| Hodgdon Universal | <<locked>> | 88% | 23,395 psi | 90% | 1129 fps | 98% |
| Lovex S011² | <<locked>> | 72% | 23,134 psi | 89% | 1066 fps | 98.3% |
| Lovex S020* | <<locked>> | 84% | 21,683 psi | 83% | 1093 fps | 92.8% |
| Maxam CSB 1 | <<locked>> | 96% | 23,177 psi | 89% | 1099 fps | 97.3% |
| Maxam CSB 2 | <<locked>> | 96% | 21,785 psi | 83% | 1132 fps | 99.9% |
| Maxam CSB 3 | <<locked>> | 88% | 22,365 psi | 86% | 1079 fps | 99.5% |
| Maxam CSB 4 | <<locked>> | 84% | 22,945 psi | 88% | 1076 fps | 100% |
| Maxam CSB 5² | <<locked>> | 76% | 21,364 psi | 82% | 1020 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 76% | 22,394 psi | 86% | 1106 fps | 87.8% |
| Ramshot Zip² | <<locked>> | 64% | 21,814 psi | 84% | 1070 fps | 97.6% |
| ReloadSwiss RS 12 | <<locked>> | 84% | 22,075 psi | 85% | 1129 fps | 100% |
| ReloadSwiss RS 20*ᴾ | <<locked>> | 100% | 23,221 psi | 89% | 1155 fps | 93.8% |
| Rottweil P 801² | <<locked>> | 76% | 22,437 psi | 86% | 1099 fps | 100% |
| SNPE Vectan A0* | <<locked>> | 96% | 23,525 psi | 90% | 1093 fps | 91.2% |
| SNPE Vectan A1 | <<locked>> | 80% | 21,814 psi | 84% | 1056 fps | 97.8% |
| SNPE Vectan BA 9 | <<locked>> | 84% | 23,003 psi | 88% | 1076 fps | 95.2% |
| SNPE Vectan BA10² | <<locked>> | 72% | 22,902 psi | 88% | 991 fps | 100% |
| SNPE Vectan BA9 1/2 | <<locked>> | 88% | 23,569 psi | 90% | 1112 fps | 97.2% |
| Somchem MP200* | <<locked>> | 84% | 21,437 psi | 82% | 1086 fps | 88.3% |
| Somchem MS200* | <<locked>> | 88% | 21,886 psi | 84% | 1083 fps | 91.6% |
| Vihtavuori N310² | <<locked>> | 64% | 21,480 psi | 82% | 1001 fps | 100% |
| Vihtavuori N320 | <<locked>> | 84% | 22,931 psi | 88% | 1099 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 13,474 psi | 52% | 889 fps | 100% |
| Vihtavuori N330 | <<locked>> | 88% | 23,177 psi | 89% | 1142 fps | 98.5% |
| Vihtavuori N340* | <<locked>> | 88% | 21,335 psi | 82% | 1076 fps | 90.2% |
| Winchester 231² | <<locked>> | 72% | 22,902 psi | 88% | 1089 fps | 98.1% |
| Winchester AutoComp | <<locked>> | 92% | 22,002 psi | 84% | 1093 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 4"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate No. 2* | <<locked>> | 80% | 21,016 psi | 81% | 1030 fps | 85.5% |
| Accurate Solo 1000² | <<locked>> | 60% | 13,300 psi | 51% | 850 fps | 96.3% |
| Accurate Solo 1250*² | <<locked>> | 64% | 11,110 psi | 43% | 823 fps | 85.6% |
| ADI AP 70N*² | <<locked>> | 60% | 13,779 psi | 53% | 915 fps | 90.9% |
| ADI APS 350² | <<locked>> | 60% | 16,868 psi | 65% | 863 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 15,650 psi | 60% | 866 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 12,807 psi | 49% | 837 fps | 99.3% |
| ADI AS 50N² | <<locked>> | 60% | 13,213 psi | 51% | 866 fps | 95.6% |
| Alliant BE-86*² | <<locked>> | 60% | 9,573 psi | 37% | 787 fps | 86.5% |
| Alliant BULLSEYE*² | <<locked>> | 68% | 16,897 psi | 65% | 988 fps | 86.7% |
| Alliant Green Dot*² | <<locked>> | 60% | 12,285 psi | 47% | 840 fps | 94.6% |
| Alliant Herco* | <<locked>> | 96% | 16,375 psi | 63% | 991 fps | 85.4% |
| Alliant RED DOT² | <<locked>> | 60% | 11,777 psi | 45% | 827 fps | 98.2% |
| Alliant Sport Pistol*² | <<locked>> | 64% | 17,361 psi | 67% | 997 fps | 86.1% |
| Alliant UNIQUE* | <<locked>> | 80% | 16,360 psi | 63% | 994 fps | 85.3% |
| Baschieri & Pellagri 100*² | <<locked>> | 60% | 11,487 psi | 44% | 814 fps | 91.9% |
| Baschieri & Pellagri 102 Pistol*² | <<locked>> | 64% | 7,310 psi | 28% | 702 fps | 86% |
| Baschieri & Pellagri 103 Pistol*² | <<locked>> | 60% | 11,023 psi | 42% | 840 fps | 92.5% |
| Hodgdon CFE Pistol*² | <<locked>> | 60% | 17,912 psi | 69% | 1014 fps | 92.6% |
| Hodgdon Clays² | <<locked>> | 60% | 12,850 psi | 49% | 804 fps | 100% |
| Hodgdon HP38² | <<locked>> | 60% | 20,537 psi | 79% | 1043 fps | 97.6% |
| Hodgdon TrailBoss* | <<locked>> | 80% | 5,439 psi | 21% | 594 fps | 85.5% |
| Hodgdon Universal*² | 2.9 gr | 60% | 11,618 psi | 45% | 850 fps | 87.7% |
| Lovex S011*² | <<locked>> | 60% | 16,418 psi | 63% | 935 fps | 94.4% |
| Lovex S020*² | <<locked>> | 72% | 15,548 psi | 60% | 961 fps | 87.3% |
| Maxam CSB 1*² | <<locked>> | 68% | 11,414 psi | 44% | 827 fps | 86.3% |
| Maxam CSB 2*² | 2.7 gr | 60% | 7,977 psi | 31% | 764 fps | 86.1% |
| Maxam CSB 3*² | <<locked>> | 60% | 11,008 psi | 42% | 814 fps | 91% |
| Maxam CSB 4² | <<locked>> | 60% | 11,734 psi | 45% | 833 fps | 95.2% |
| Maxam CSB 5² | <<locked>> | 60% | 13,358 psi | 51% | 866 fps | 100% |
| Ramshot Silhouette*² | <<locked>> | 72% | 19,522 psi | 75% | 1050 fps | 85.3% |
| Ramshot Zip² | <<locked>> | 60% | 19,667 psi | 75% | 1027 fps | 96.5% |
| ReloadSwiss RS 12² | <<locked>> | 60% | 10,878 psi | 42% | 873 fps | 95.4% |
| ReloadSwiss RS 20* | <<locked>> | 84% | 15,795 psi | 61% | 991 fps | 86.5% |
| Rottweil P 801² | <<locked>> | 60% | 14,286 psi | 55% | 938 fps | 99.7% |
| SNPE Vectan A0* | <<locked>> | 80% | 16,810 psi | 64% | 955 fps | 85.2% |
| SNPE Vectan A1*² | <<locked>> | 60% | 12,343 psi | 47% | 840 fps | 89.8% |
| SNPE Vectan BA 9*² | <<locked>> | 64% | 13,213 psi | 51% | 860 fps | 86.1% |
| SNPE Vectan BA10² | <<locked>> | 60% | 16,737 psi | 64% | 889 fps | 100% |
| SNPE Vectan BA9 1/2*² | <<locked>> | 60% | 11,081 psi | 42% | 817 fps | 85.2% |
| Somchem MP200* | <<locked>> | 80% | 19,522 psi | 75% | 1047 fps | 86.6% |
| Somchem MS200*² | <<locked>> | 76% | 16,215 psi | 62% | 958 fps | 86.4% |
| Vihtavuori N310² | <<locked>> | 60% | 18,666 psi | 72% | 958 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 11,356 psi | 44% | 850 fps | 95.2% |
| Vihtavuori N32C Tin Star*² | <<locked>> | 60% | 5,860 psi | 22% | 633 fps | 92.9% |
| Vihtavuori N330*² | 3.2 gr | 64% | 11,197 psi | 43% | 860 fps | 87.4% |
| Vihtavuori N340* | <<locked>> | 80% | 16,476 psi | 63% | 974 fps | 85.6% |
| Winchester 231*² | <<locked>> | 60% | 15,853 psi | 61% | 945 fps | 93.6% |
| Winchester AutoComp *² | <<locked>> | 68% | 11,748 psi | 45% | 850 fps | 85.1% |
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 49 powders for 9 x 18 Ultra loaded with the .355 | 100gr | Speer JHP. ReloadSwiss RS 20 delivers the highest muzzle velocity at 1,155 fps; across all powders the maximum-charge window runs from 696 fps to 1,155 fps. Alliant Herco gives the best case fill at 100 %, and 35 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (180 MPa), the top charges use 29–90 %, 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. Vihtavuori N330, Maxam CSB 2, Hodgdon Universal rank at the top here: for 9 x 18 Ultra with the .355 | 100gr | Speer JHP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate No. 2, Alliant BULLSEYE, Alliant Herco 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.