Load Specifications
Load data in caliber 9 x 18 Ultra with .355 | 65gr | Lehigh Defense Xtreme Defense bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 801, Maxam CSB 5 and ADI APS 450.
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 Solo 1000ᴾ | <<locked>> | 100% | 22,118 psi | 85% | 1283 fps | 95.7% |
| Accurate Solo 1000ᴾ | <<locked>> | 100% | 22,118 psi | 85% | 1283 fps | 95.7% |
| ADI AP 70N*ᴾ | <<locked>> | 100% | 21,843 psi | 84% | 1362 fps | 89.4% |
| ADI AP 70N*ᴾ | <<locked>> | 100% | 21,843 psi | 84% | 1362 fps | 89.4% |
| ADI APS 350 | <<locked>> | 92% | 22,510 psi | 86% | 1211 fps | 100% |
| ADI APS 350 | <<locked>> | 92% | 22,510 psi | 86% | 1211 fps | 100% |
| ADI APS 450 | <<locked>> | 96% | 23,105 psi | 89% | 1253 fps | 100% |
| ADI APS 450 | <<locked>> | 96% | 23,105 psi | 89% | 1253 fps | 100% |
| ADI AS 30ᴾ | <<locked>> | 100% | 18,942 psi | 73% | 1237 fps | 98.2% |
| ADI AS 30ᴾ | <<locked>> | 100% | 18,942 psi | 73% | 1237 fps | 98.2% |
| ADI AS 50N*ᴾ | <<locked>> | 100% | 19,653 psi | 75% | 1270 fps | 93.5% |
| ADI AS 50N*ᴾ | <<locked>> | 100% | 19,653 psi | 75% | 1270 fps | 93.5% |
| Alliant Green Dot*ᴾ | <<locked>> | 100% | 18,159 psi | 70% | 1237 fps | 92.5% |
| Alliant Green Dot*ᴾ | <<locked>> | 100% | 18,159 psi | 70% | 1237 fps | 92.5% |
| Alliant RED DOTᴾ | <<locked>> | 100% | 17,143 psi | 66% | 1220 fps | 96.7% |
| Alliant RED DOTᴾ | <<locked>> | 100% | 17,143 psi | 66% | 1220 fps | 96.7% |
| Baschieri & Pellagri 100*ᴾ | <<locked>> | 100% | 17,825 psi | 68% | 1198 fps | 89.6% |
| Baschieri & Pellagri 100*ᴾ | <<locked>> | 100% | 17,825 psi | 68% | 1198 fps | 89.6% |
| Baschieri & Pellagri 103 Pistol*ᴾ | <<locked>> | 100% | 19,566 psi | 75% | 1276 fps | 92.3% |
| Baschieri & Pellagri 103 Pistol*ᴾ | <<locked>> | 100% | 19,566 psi | 75% | 1276 fps | 92.3% |
| Hodgdon CFE Pistol* | <<locked>> | 88% | 23,424 psi | 90% | 1362 fps | 87.1% |
| Hodgdon CFE Pistol* | <<locked>> | 88% | 23,424 psi | 90% | 1362 fps | 87.1% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 20,001 psi | 77% | 1194 fps | 100% |
| Hodgdon Claysᴾ | <<locked>> | 100% | 20,001 psi | 77% | 1194 fps | 100% |
| Hodgdon HP38* | <<locked>> | 80% | 22,118 psi | 85% | 1312 fps | 90.7% |
| Hodgdon HP38* | <<locked>> | 80% | 22,118 psi | 85% | 1312 fps | 90.7% |
| Hodgdon TiteGroup² | <<locked>> | 72% | 21,959 psi | 84% | 1296 fps | 97.1% |
| Hodgdon TiteGroup² | <<locked>> | 72% | 21,959 psi | 84% | 1296 fps | 97.1% |
| Lovex S011* | <<locked>> | 88% | 21,306 psi | 82% | 1257 fps | 89.1% |
| Lovex S011* | <<locked>> | 88% | 21,306 psi | 82% | 1257 fps | 89.1% |
| Maxam CSB 3*ᴾ | <<locked>> | 100% | 16,781 psi | 64% | 1201 fps | 88.9% |
| Maxam CSB 3*ᴾ | <<locked>> | 100% | 16,781 psi | 64% | 1201 fps | 88.9% |
| Maxam CSB 4*ᴾ | <<locked>> | 100% | 18,449 psi | 71% | 1240 fps | 93.9% |
| Maxam CSB 4*ᴾ | <<locked>> | 100% | 18,449 psi | 71% | 1240 fps | 93.9% |
| Maxam CSB 5ᴾ | <<locked>> | 100% | 21,959 psi | 84% | 1312 fps | 100% |
| Maxam CSB 5ᴾ | <<locked>> | 100% | 21,959 psi | 84% | 1312 fps | 100% |
| Ramshot Zip* | <<locked>> | 84% | 23,525 psi | 90% | 1342 fps | 90.7% |
| Ramshot Zip* | <<locked>> | 84% | 23,525 psi | 90% | 1342 fps | 90.7% |
| ReloadSwiss RS 12*ᴾ | <<locked>> | 100% | 15,229 psi | 58% | 1270 fps | 92.7% |
| ReloadSwiss RS 12*ᴾ | <<locked>> | 100% | 15,229 psi | 58% | 1270 fps | 92.7% |
| Rottweil P 801ᴾ | <<locked>> | 100% | 20,842 psi | 80% | 1371 fps | 98.8% |
| Rottweil P 801ᴾ | <<locked>> | 100% | 20,842 psi | 80% | 1371 fps | 98.8% |
| SNPE Vectan A1*ᴾ | <<locked>> | 100% | 21,712 psi | 83% | 1280 fps | 89.6% |
| SNPE Vectan A1*ᴾ | <<locked>> | 100% | 21,712 psi | 83% | 1280 fps | 89.6% |
| SNPE Vectan BA10 | <<locked>> | 88% | 23,090 psi | 88% | 1253 fps | 100% |
| SNPE Vectan BA10 | <<locked>> | 88% | 23,090 psi | 88% | 1253 fps | 100% |
| Vihtavuori N310 | <<locked>> | 88% | 23,511 psi | 90% | 1329 fps | 100% |
| Vihtavuori N310 | <<locked>> | 88% | 23,511 psi | 90% | 1329 fps | 100% |
| Vihtavuori N320*ᴾ | <<locked>> | 100% | 17,332 psi | 66% | 1247 fps | 93.2% |
| Vihtavuori N320*ᴾ | <<locked>> | 100% | 17,332 psi | 66% | 1247 fps | 93.2% |
| Winchester 231* | <<locked>> | 92% | 23,525 psi | 90% | 1342 fps | 90.7% |
| Winchester 231* | <<locked>> | 92% | 23,525 psi | 90% | 1342 fps | 90.7% |
| Winchester 244*² | <<locked>> | 76% | 20,987 psi | 80% | 1293 fps | 90.8% |
| Winchester 244*² | <<locked>> | 76% | 20,987 psi | 80% | 1293 fps | 90.8% |
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 Solo 1000*² | <<locked>> | 76% | 12,270 psi | 47% | 1020 fps | 86.1% |
| Accurate Solo 1000*² | <<locked>> | 76% | 12,270 psi | 47% | 1020 fps | 86.1% |
| ADI AP 70N* | <<locked>> | 92% | 17,274 psi | 66% | 1250 fps | 85.1% |
| ADI AP 70N* | <<locked>> | 92% | 17,274 psi | 66% | 1250 fps | 85.1% |
| ADI APS 350² | <<locked>> | 60% | 9,921 psi | 38% | 902 fps | 97.6% |
| ADI APS 350² | <<locked>> | 60% | 9,921 psi | 38% | 902 fps | 97.6% |
| ADI APS 450*² | 2 gr | 60% | 9,471 psi | 36% | 899 fps | 94.4% |
| ADI APS 450*² | 2 gr | 60% | 9,471 psi | 36% | 899 fps | 94.4% |
| ADI AS 30*² | <<locked>> | 68% | 9,065 psi | 35% | 928 fps | 87.3% |
| ADI AS 30*² | <<locked>> | 68% | 9,065 psi | 35% | 928 fps | 87.3% |
| ADI AS 50N* | <<locked>> | 80% | 12,488 psi | 48% | 1066 fps | 85.7% |
| ADI AS 50N* | <<locked>> | 80% | 12,488 psi | 48% | 1066 fps | 85.7% |
| Alliant Green Dot* | <<locked>> | 84% | 12,314 psi | 47% | 1063 fps | 85.6% |
| Alliant Green Dot* | <<locked>> | 84% | 12,314 psi | 47% | 1063 fps | 85.6% |
| Alliant RED DOT*² | <<locked>> | 72% | 8,673 psi | 33% | 932 fps | 85.4% |
| Alliant RED DOT*² | <<locked>> | 72% | 8,673 psi | 33% | 932 fps | 85.4% |
| Baschieri & Pellagri 100* | <<locked>> | 92% | 14,620 psi | 56% | 1112 fps | 86.1% |
| Baschieri & Pellagri 100* | <<locked>> | 92% | 14,620 psi | 56% | 1112 fps | 86.1% |
| Baschieri & Pellagri 103 Pistol* | <<locked>> | 88% | 13,561 psi | 52% | 1119 fps | 85.7% |
| Baschieri & Pellagri 103 Pistol* | <<locked>> | 88% | 13,561 psi | 52% | 1119 fps | 85.7% |
| Hodgdon CFE Pistol* | <<locked>> | 84% | 20,987 psi | 80% | 1312 fps | 85.2% |
| Hodgdon CFE Pistol* | <<locked>> | 84% | 20,987 psi | 80% | 1312 fps | 85.2% |
| Hodgdon Clays*² | <<locked>> | 60% | 7,310 psi | 28% | 804 fps | 89.5% |
| Hodgdon Clays*² | <<locked>> | 60% | 7,310 psi | 28% | 804 fps | 89.5% |
| Hodgdon HP38*² | <<locked>> | 72% | 17,535 psi | 67% | 1204 fps | 86.7% |
| Hodgdon HP38*² | <<locked>> | 72% | 17,535 psi | 67% | 1204 fps | 86.7% |
| Hodgdon TiteGroup*² | <<locked>> | 60% | 13,967 psi | 54% | 1099 fps | 90.7% |
| Hodgdon TiteGroup*² | <<locked>> | 60% | 13,967 psi | 54% | 1099 fps | 90.7% |
| Lovex S011* | <<locked>> | 80% | 17,651 psi | 68% | 1171 fps | 85.8% |
| Lovex S011* | <<locked>> | 80% | 17,651 psi | 68% | 1171 fps | 85.8% |
| Maxam CSB 3* | <<locked>> | 92% | 13,808 psi | 53% | 1112 fps | 85.2% |
| Maxam CSB 3* | <<locked>> | 92% | 13,808 psi | 53% | 1112 fps | 85.2% |
| Maxam CSB 4* | <<locked>> | 80% | 11,487 psi | 44% | 1033 fps | 85.6% |
| Maxam CSB 4* | <<locked>> | 80% | 11,487 psi | 44% | 1033 fps | 85.6% |
| Maxam CSB 5*² | 2.1 gr | 60% | 7,571 psi | 29% | 873 fps | 86.5% |
| Maxam CSB 5*² | 2.1 gr | 60% | 7,571 psi | 29% | 873 fps | 86.5% |
| Ramshot Zip*² | <<locked>> | 76% | 18,724 psi | 72% | 1234 fps | 86.7% |
| Ramshot Zip*² | <<locked>> | 76% | 18,724 psi | 72% | 1234 fps | 86.7% |
| ReloadSwiss RS 12* | <<locked>> | 88% | 10,994 psi | 42% | 1122 fps | 86.1% |
| ReloadSwiss RS 12* | <<locked>> | 88% | 10,994 psi | 42% | 1122 fps | 86.1% |
| Rottweil P 801*² | 3.2 gr | 72% | 8,630 psi | 33% | 1001 fps | 85.4% |
| Rottweil P 801*² | 3.2 gr | 72% | 8,630 psi | 33% | 1001 fps | 85.4% |
| SNPE Vectan A1* | <<locked>> | 92% | 17,434 psi | 67% | 1181 fps | 85.7% |
| SNPE Vectan A1* | <<locked>> | 92% | 17,434 psi | 67% | 1181 fps | 85.7% |
| SNPE Vectan BA10² | <<locked>> | 60% | 11,211 psi | 43% | 961 fps | 96.6% |
| SNPE Vectan BA10² | <<locked>> | 60% | 11,211 psi | 43% | 961 fps | 96.6% |
| Vihtavuori N310² | <<locked>> | 60% | 9,631 psi | 37% | 984 fps | 96.5% |
| Vihtavuori N310² | <<locked>> | 60% | 9,631 psi | 37% | 984 fps | 96.5% |
| Vihtavuori N320* | <<locked>> | 84% | 11,473 psi | 44% | 1063 fps | 85.3% |
| Vihtavuori N320* | <<locked>> | 84% | 11,473 psi | 44% | 1063 fps | 85.3% |
| Winchester 231* | <<locked>> | 84% | 18,724 psi | 72% | 1234 fps | 86.7% |
| Winchester 231* | <<locked>> | 84% | 18,724 psi | 72% | 1234 fps | 86.7% |
| Winchester 244*² | <<locked>> | 68% | 16,505 psi | 63% | 1181 fps | 86.6% |
| Winchester 244*² | <<locked>> | 68% | 16,505 psi | 63% | 1181 fps | 86.6% |
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 54 powders for 9 x 18 Ultra loaded with the .355 | 65gr | Lehigh Defense Xtreme Defense. Rottweil P 801 delivers the highest muzzle velocity at 1,371 fps; across all powders the maximum-charge window runs from 1,194 fps to 1,371 fps. Accurate Solo 1000 gives the best case fill at 100 %, and 50 of the 54 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (180 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. Accurate Solo 1000, Accurate Solo 1000, ADI AP 70N 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. Rottweil P 801, Maxam CSB 5, ADI APS 450 rank at the top here: for 9 x 18 Ultra with the .355 | 65gr | Lehigh Defense Xtreme Defense they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 70N, ADI AP 70N, ADI AS 50N burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1000, ADI APS 350 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.