Load data for 9 mm Mauser + .356 | 123gr | LOS HP

9 mm Mauser cartridge drawing
LOS logo

Load Specifications

Bullet Manufacturer:LOS
Bullet Weight:123 gr
Bullet Diameter:0.356"
Bullet Length:<<locked>>
Case Length (l3):0.984"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:18.9 Grains of Water
Primer Size:Small Pistol (SP)
Barrel Length:5.5"
Max. allowed Pressure:37,710 psi

Load data in caliber 9 mm Mauser with .356 | 123gr | LOS HP bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Rottweil P 806, SNPE Vectan BA7 1/2 and Vihtavuori N350.

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: 5.5"

PowderChargeFRMaxP%V(0)z
Accurate No. 2²<<locked>>76%32,938 psi87%1332 fps100%
Accurate Solo 1000²<<locked>>76%32,518 psi86%1237 fps100%
Accurate Solo 1250<<locked>>80%31,560 psi84%1286 fps100%
ADI AP 100*ᴾ<<locked>>100%32,822 psi87%1407 fps94.6%
ADI AP 70N²<<locked>>68%33,808 psi90%1329 fps100%
ADI APS 350²<<locked>>72%32,532 psi86%1125 fps100%
ADI APS 450²<<locked>>76%33,910 psi90%1178 fps100%
ADI AS 30²<<locked>>76%32,300 psi86%1201 fps100%
ADI AS 50N²<<locked>>72%32,082 psi85%1247 fps100%
Alliant BE-86<<locked>>80%32,996 psi88%1293 fps100%
Alliant BULLSEYE²<<locked>>72%33,011 psi88%1371 fps100%
Alliant Green Dot²<<locked>>76%32,605 psi86%1257 fps100%
Alliant Herco<<locked>>96%32,822 psi87%1371 fps100%
Alliant POWER PISTOL*<<locked>>84%34,113 psi90%1476 fps94.5%
Alliant RED DOT<<locked>>80%33,924 psi90%1243 fps100%
Alliant Sport Pistol²<<locked>>68%33,388 psi89%1381 fps100%
Alliant UNIQUE<<locked>>80%31,575 psi84%1358 fps100%
Baschieri & Pellagri 100²<<locked>>76%32,285 psi86%1240 fps100%
Baschieri & Pellagri 102 Pistol<<locked>>96%32,024 psi85%1257 fps100%
Baschieri & Pellagri 103 Pistol²<<locked>>72%32,169 psi85%1263 fps100%
Hodgdon Clays<<locked>>84%33,388 psi89%1171 fps100%
Hodgdon HS-6²<<locked>>68%33,301 psi88%1401 fps97.9%
Hodgdon Longshot²<<locked>>64%32,213 psi85%1381 fps98.7%
Hodgdon TrailBossᴾ<<locked>>100%15,824 psi42%938 fps100%
Hodgdon Universal²<<locked>>76%33,808 psi90%1329 fps100%
Lovex S011²<<locked>>64%30,734 psi82%1243 fps100%
Lovex S020²<<locked>>72%30,821 psi82%1306 fps100%
Maxam CSB 1<<locked>>84%32,561 psi86%1293 fps100%
Maxam CSB 2<<locked>>80%31,923 psi85%1293 fps100%
Maxam CSB 3<<locked>>80%33,605 psi89%1286 fps100%
Maxam CSB 4²<<locked>>76%32,126 psi85%1243 fps100%
Maxam CSB 5²<<locked>>72%32,822 psi87%1201 fps100%
Ramshot Silhouette²<<locked>>68%32,880 psi87%1375 fps100%
Ramshot True Blue²<<locked>>64%33,460 psi89%1394 fps99%
ReloadSwiss RS 12²<<locked>>68%31,459 psi83%1270 fps100%
ReloadSwiss RS 14ᴾ<<locked>>100%14,823 psi39%945 fps100%
ReloadSwiss RS 20<<locked>>84%32,285 psi86%1371 fps100%
ReloadSwiss RS 24*<<locked>>84%31,705 psi84%1424 fps87.2%
Rottweil P 801²<<locked>>64%31,966 psi85%1240 fps100%
Rottweil P 806<<locked>>92%33,431 psi89%1503 fps98.6%
SNPE Vectan A0<<locked>>84%32,184 psi85%1319 fps100%
SNPE Vectan A1²<<locked>>76%33,852 psi90%1296 fps100%
SNPE Vectan BA 9²<<locked>>76%32,735 psi87%1302 fps100%
SNPE Vectan BA10²<<locked>>68%31,879 psi85%1155 fps100%
SNPE Vectan BA7 1/2<<locked>>92%33,953 psi90%1391 fps98.7%
SNPE Vectan BA9 1/2²<<locked>>76%31,923 psi85%1296 fps100%
SNPE Vectan SP 2*²<<locked>>76%30,719 psi81%1430 fps94.9%
Somchem MP200²<<locked>>76%33,591 psi89%1375 fps100%
Somchem MS200<<locked>>80%33,112 psi88%1345 fps100%
Somchem S221*²<<locked>>68%30,052 psi80%1368 fps89.8%
Vihtavuori 3N37<<locked>>84%33,402 psi89%1411 fps99.2%
Vihtavuori 3N38*ᴾ<<locked>>100%33,098 psi88%1434 fps88.9%
Vihtavuori N105*ᴾ<<locked>>100%27,876 psi74%1407 fps90.2%
Vihtavuori N320²<<locked>>72%32,097 psi85%1250 fps100%
Vihtavuori N32C Tin Starᴾ<<locked>>100%28,021 psi74%1125 fps100%
Vihtavuori N330²<<locked>>72%30,429 psi81%1289 fps100%
Vihtavuori N340<<locked>>80%32,692 psi87%1342 fps100%
Vihtavuori N350<<locked>>88%31,444 psi83%1378 fps99%
Winchester 231²<<locked>>64%32,590 psi86%1289 fps100%
Winchester AutoComp <<locked>>84%34,040 psi90%1335 fps100%

Recommended = one of the top powders for this cartridge and bullet combination.

Start Load - Barrel Length: 5.5"

PowderChargeFRMaxP%V(0)z
Accurate No. 2²<<locked>>60%20,624 psi55%1125 fps97.4%
Accurate Solo 1000²<<locked>>60%21,915 psi58%1079 fps100%
Accurate Solo 1250²<<locked>>60%18,826 psi50%1073 fps100%
ADI AP 100*²<<locked>>76%18,913 psi50%1132 fps85.4%
ADI AP 70N²<<locked>>60%26,832 psi71%1227 fps100%
ADI APS 350²<<locked>>60%24,439 psi65%1017 fps100%
ADI APS 450²<<locked>>60%23,554 psi62%1037 fps100%
ADI AS 30²<<locked>>60%22,278 psi59%1053 fps100%
ADI AS 50N²<<locked>>60%24,076 psi64%1125 fps100%
Alliant BE-86²<<locked>>60%19,203 psi51%1076 fps100%
Alliant BULLSEYE²<<locked>>60%23,641 psi63%1214 fps99.9%
Alliant Green Dot²<<locked>>60%22,278 psi59%1099 fps100%
Alliant Herco²<<locked>>60%14,330 psi38%991 fps95.3%
Alliant POWER PISTOL*²<<locked>>64%19,943 psi53%1188 fps85.3%
Alliant RED DOT²<<locked>>60%21,785 psi58%1063 fps100%
Alliant Sport Pistol²<<locked>>60%26,484 psi70%1270 fps100%
Alliant UNIQUE²<<locked>>60%19,247 psi51%1125 fps98.5%
Baschieri & Pellagri 100²<<locked>>60%21,190 psi56%1076 fps100%
Baschieri & Pellagri 102 Pistol²<<locked>>60%13,880 psi37%942 fps100%
Baschieri & Pellagri 103 Pistol²<<locked>>60%22,713 psi60%1129 fps100%
Hodgdon Clays²<<locked>>60%19,435 psi52%965 fps100%
Hodgdon HS-6*²<<locked>>60%25,382 psi67%1266 fps94.8%
Hodgdon Longshot²<<locked>>60%28,471 psi76%1322 fps97.7%
Hodgdon TrailBoss²<<locked>>60%8,224 psi22%709 fps100%
Hodgdon Universal²<<locked>>60%23,003 psi61%1161 fps100%
Lovex S011²<<locked>>60%26,977 psi72%1191 fps100%
Lovex S020²<<locked>>60%21,886 psi58%1161 fps100%
Maxam CSB 1²<<locked>>60%18,202 psi48%1053 fps100%
Maxam CSB 2²<<locked>>60%19,348 psi51%1093 fps100%
Maxam CSB 3²<<locked>>60%20,233 psi54%1079 fps100%
Maxam CSB 4²<<locked>>60%21,727 psi58%1086 fps100%
Maxam CSB 5²<<locked>>60%25,019 psi66%1096 fps100%
Ramshot Silhouette²<<locked>>60%25,947 psi69%1263 fps99.4%
Ramshot True Blue²<<locked>>60%29,602 psi79%1335 fps98.1%
ReloadSwiss RS 12²<<locked>>60%25,382 psi67%1181 fps100%
ReloadSwiss RS 14²<<locked>>60%8,079 psi21%712 fps98.4%
ReloadSwiss RS 20²<<locked>>60%17,085 psi45%1096 fps99%
ReloadSwiss RS 24*<<locked>>80%28,253 psi75%1362 fps85.1%
Rottweil P 801²<<locked>>60%28,485 psi76%1191 fps100%
Rottweil P 806*²8.6 gr64%14,301 psi38%1096 fps86%
SNPE Vectan A0²<<locked>>60%17,535 psi47%1050 fps97.4%
SNPE Vectan A1²<<locked>>60%22,278 psi59%1122 fps100%
SNPE Vectan BA 9²<<locked>>60%21,393 psi57%1122 fps100%
SNPE Vectan BA10²<<locked>>60%26,165 psi69%1076 fps100%
SNPE Vectan BA7 1/2*²5.9 gr60%15,345 psi41%1017 fps87.9%
SNPE Vectan BA9 1/2²<<locked>>60%21,074 psi56%1122 fps100%
SNPE Vectan SP 2*²<<locked>>60%18,637 psi49%1178 fps86.5%
Somchem MP200²<<locked>>60%21,567 psi57%1168 fps98.6%
Somchem MS200²<<locked>>60%19,638 psi52%1109 fps99.2%
Somchem S221*²<<locked>>60%23,351 psi62%1240 fps85.3%
Vihtavuori 3N37*²<<locked>>60%17,114 psi45%1093 fps91.3%
Vihtavuori 3N38*<<locked>>92%27,296 psi72%1335 fps85.4%
Vihtavuori N105*<<locked>>92%22,176 psi59%1286 fps85.5%
Vihtavuori N320²<<locked>>60%22,989 psi61%1119 fps100%
Vihtavuori N32C Tin Star²<<locked>>60%12,807 psi34%853 fps100%
Vihtavuori N330²<<locked>>60%21,393 psi57%1148 fps100%
Vihtavuori N340²<<locked>>60%19,029 psi50%1102 fps98.6%
Vihtavuori N350*²5.8 gr60%15,055 psi40%1033 fps89.5%
Winchester 231²<<locked>>60%29,051 psi77%1240 fps100%
Winchester AutoComp ²<<locked>>60%18,927 psi50%1086 fps100%

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.

<<locked>> you need an access license to unlock this data.

This overview compares 60 powders for 9 mm Mauser loaded with the .356 | 123gr | LOS HP. Rottweil P 806 delivers the highest muzzle velocity at 1,503 fps; across all powders the maximum-charge window runs from 938 fps to 1,503 fps. ADI AP 100 gives the best case fill at 100 %, and 27 of the 60 powders fall inside the usable 80–100 % fill window.

Relative to the caliber's maximum pressure (260 MPa), the top charges use 39–90 %, leaving at least 10 % headroom. ADI AP 100, Hodgdon TrailBoss, ReloadSwiss RS 14 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 806, SNPE Vectan BA7 1/2, Vihtavuori N350 rank at the top here: for 9 mm Mauser with the .356 | 123gr | LOS HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AP 100, Alliant POWER PISTOL, ReloadSwiss RS 24 burn incompletely and react more sensitively to barrel length and temperature. Accurate Solo 1000, Accurate Solo 1250, 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.

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