Load data for .357 SIG + .356 | 123gr | LOS RN

Recommended Powder(s): Alliant UNIQUE, ReloadSwiss RS 20, Somchem MS200, Vihtavuori 3N37, Vihtavuori N340

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.356 \| 123gr \| LOS RN
Bullet Weight:	123gr \| 8.0g
Bullet Diameter:	0.356" \| 9.04mm
Bullet Length:	0.580" \| 14.7mm
Caliber:	.357 SIG load data
Case Length (l3):	0.860" \| 21.8mm
Cartridge Length (C.O.L.):	1.123" \| 28.5mm
Seated Depth:	0.317" \| 8.1mm
Shank Seated Depth:	0.317" \| 8.1mm
Case Capacity:	19.5 Grains of Water \| 1.27 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B3508_C518
Last updated:	2025-01-01

Load data for 118 loads in caliber .357 SIG with .356 | 123gr | LOS RN bullet and 59 powders such as Alliant UNIQUE, ReloadSwiss RS 20, Somchem MS200, Vihtavuori 3N37, Vihtavuori N340. The key underlying parameters are shown in the table above.

Important Notice: DO NOT go below Minimum Charge or above Maximum Charge unless there are reasons. Since xxlreloading.com has no control over the equipment and components used by the customer and the data used in connection with the website, any responsibility and liability for the results achieved is rejected. Also see our Terms of Service.

Questions regarding the load data: Please read the information in the next tab "Explanations".
A load must fulfill certain criteria to be listed in the default view below - see "powder criteria to fulfill to be listed".

Our load data might deviate from other sources - see the "most common reasons for deviations".

All loads are based on the bullet and case dimensions shown under "Load Specifications" - see "reloading suggestions" if you deviate.

You can set your specifications in the "Personalized Load Calculator".

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Our default view only displays powders/loads that fulfill certain criteria: Max pressure of a load <=90% of Max. Standardized Pressure. Fill Rate (Min FR): >80% and <100% for rife loads, >60% and <100% for pistol loads. Min. Propellant Combustion (Min z): >90% for rifle loads , >80% for pistol/revolver loads. Relax these criteria at your own risk to potentially get more powders shown in the load tables.
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.

Click on the desired row in the tables below to add a specific load / powder to your Diary and manage there.

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	97%	25759	58%	**43	89%
ADI AP 70N	<<locked>>	80%	38290	87%	**48	100%
ADI APS 350	<<locked>>	85%	38943	88%	**55	100%
ADI APS 450	<<locked>>	86%	38276	87%	**84	100%
ADI AS 30	<<locked>>	90%	38682	87%	**37	100%
ADI AS 50N	<<locked>>	87%	39378	89%	**99	100%
Accurate No. 2	<<locked>>	88%	39784	90%	**62	100%
Accurate No. 5	<<locked>>	72%	37826	86%	**40	96%
[Accurate No. 7]*	<<locked>>	92%	39001	88%	**96	85%
Accurate Solo 1000	<<locked>>	89%	38885	88%	**73	100%
Accurate Solo 1250	<<locked>>	95%	38174	86%	**25	100%
Alliant BULLSEYE	<<locked>>	85%	39740	90%	**14	100%
Alliant POWER PISTOL	<<locked>>	97%	39726	90%	**12	95%
Alliant UNIQUE 👍	<<locked>>	97%	38783	88%	**21	100%
Baschieri & Pellagri 100	<<locked>>	90%	38232	86%	**70	100%
Hodgdon Clays	<<locked>>	85%	39653	90%	**71	100%
Hodgdon HP38	<<locked>>	68%	39276	89%	**22	100%
Hodgdon HS-6	<<locked>>	79%	39726	90%	**40	98%
Hodgdon Longshot	<<locked>>	75%	38609	87%	**30	99%
Hodgdon TiteGroup	<<locked>>	62%	39247	89%	**66	100%
Hodgdon Universal	<<locked>>	88%	38290	87%	**48	100%
Hodgdon CFE Pistol	<<locked>>	90%	37811	85%	**42	100%
Hodgdon TrailBoss	<<locked>>	95%	11618	26%	**0	100%
Lovex D036	<<locked>>	72%	37768	85%	**40	96%
[Lovex D037.1]*	<<locked>>	92%	39001	88%	**96	85%
Lovex S011	<<locked>>	77%	38508	87%	**99	100%
Lovex S020	<<locked>>	88%	39653	90%	**75	100%
Maxam CSB 1	<<locked>>	96%	35230	80%	**93	100%
Maxam CSB 2	<<locked>>	95%	37449	85%	**35	100%
Maxam CSB 3	<<locked>>	93%	38551	87%	**02	100%
Maxam CSB 4	<<locked>>	90%	38885	88%	**83	100%
Maxam CSB 5	<<locked>>	85%	39726	90%	**40	100%
Ramshot Silhouette	<<locked>>	78%	37637	85%	**94	100%
Ramshot True Blue 👍	<<locked>>	74%	39697	90%	**34	99%
Ramshot Zip	<<locked>>	67%	37913	86%	**16	100%
ReloadSwiss RS 12	<<locked>>	85%	39247	89%	**39	100%
ReloadSwiss RS 14	<<locked>>	93%	10385	23%	**4	99%
ReloadSwiss RS 20 👍	<<locked>>	95%	35244	80%	**75	100%
[ReloadSwiss RS 24]*	<<locked>>	95%	35389	80%	**27	86%
Rottweil P 801	<<locked>>	77%	37652	85%	**76	100%
Rottweil P 806	<<locked>>	96%	26876	61%	**81	95%
SNPE Vectan A0	<<locked>>	95%	35549	80%	**19	100%
SNPE Vectan BA 9	<<locked>>	90%	39378	89%	**39	100%
SNPE Vectan BA10	<<locked>>	80%	38261	86%	**84	100%
SNPE Vectan BA7 1/2	<<locked>>	97%	32140	73%	**22	97%
SNPE Vectan BA9 1/2	<<locked>>	92%	39682	90%	**52	100%
Shooters World Auto Pistol	<<locked>>	72%	37768	85%	**40	96%
[Shooters World Major Pistol]*	<<locked>>	92%	39001	88%	**96	85%
Somchem MP200	<<locked>>	89%	39160	89%	**07	100%
Somchem MS200 👍	<<locked>>	93%	38812	88%	**78	100%
Somchem S221	<<locked>>	82%	37724	85%	**40	91%
Vihtavuori 3N37	<<locked>>	96%	37289	84%	**27	99%
Vihtavuori N310	<<locked>>	72%	39262	89%	**01	100%
Vihtavuori N320	<<locked>>	87%	37753	85%	**83	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	25295	57%	**70	100%
Vihtavuori N330	<<locked>>	91%	39537	89%	**71	100%
Vihtavuori N340 👍	<<locked>>	94%	38725	88%	**78	100%
Vihtavuori N350	<<locked>>	96%	33576	76%	**71	99%
Winchester 231	<<locked>>	75%	37913	86%	**16	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	78%	16288	37%	**33	80%
ADI AP 70N	<<locked>>	61%	23264	53%	**45	100%
ADI APS 350	<<locked>>	61%	22902	52%	**8	100%
ADI APS 450	<<locked>>	61%	21640	49%	**4	100%
ADI AS 30	<<locked>>	62%	20436	46%	**7	100%
ADI AS 50N	<<locked>>	60%	20204	46%	**37	100%
Accurate No. 2	<<locked>>	61%	18231	41%	**37	94%
Accurate No. 5	<<locked>>	60%	25889	59%	**47	91%
[Accurate No. 7]*	<<locked>>	83%	29457	67%	**55	80%
Accurate Solo 1000	<<locked>>	60%	19435	44%	**07	100%
Accurate Solo 1250	<<locked>>	61%	15882	36%	**4	99%
Alliant BULLSEYE	<<locked>>	61%	21089	48%	**32	99%
[Alliant POWER PISTOL]*	<<locked>>	66%	17071	39%	**86	80%
Alliant UNIQUE	<<locked>>	61%	15766	36%	**17	95%
Baschieri & Pellagri 100	<<locked>>	61%	18144	41%	**4	100%
Hodgdon Clays	<<locked>>	61%	23032	52%	**4	100%
Hodgdon HP38	<<locked>>	61%	31647	72%	**34	100%
Hodgdon HS-6	<<locked>>	62%	22408	51%	**75	91%
Hodgdon Longshot	<<locked>>	61%	23902	54%	**07	94%
Hodgdon TiteGroup	<<locked>>	61%	37260	84%	**47	100%
Hodgdon Universal	<<locked>>	61%	19247	44%	**66	100%
Hodgdon CFE Pistol	<<locked>>	61%	17506	40%	**33	100%
Hodgdon TrailBoss	<<locked>>	65%	6860	16%	**9	99%
Lovex D036	<<locked>>	60%	25846	58%	**47	91%
[Lovex D037.1]*	<<locked>>	83%	29457	67%	**55	80%
Lovex S011	<<locked>>	62%	25280	57%	**32	100%
Lovex S020	<<locked>>	61%	18043	41%	**56	98%
Maxam CSB 1	<<locked>>	61%	15345	35%	**8	99%
Maxam CSB 2	<<locked>>	62%	15838	36%	**10	100%
Maxam CSB 3	<<locked>>	60%	17303	39%	**7	100%
Maxam CSB 4	<<locked>>	62%	19580	44%	**24	100%
Maxam CSB 5	<<locked>>	61%	22147	50%	**27	100%
Ramshot Silhouette	<<locked>>	62%	22872	52%	**71	98%
Ramshot True Blue	<<locked>>	61%	25483	58%	**27	95%
Ramshot Zip	<<locked>>	60%	30472	69%	**24	100%
ReloadSwiss RS 12	<<locked>>	61%	20537	46%	**89	100%
ReloadSwiss RS 14	<<locked>>	68%	6889	16%	**3	95%
ReloadSwiss RS 20	<<locked>>	61%	13938	32%	**8	96%
[ReloadSwiss RS 24]*	<<locked>>	84%	25469	58%	**70	81%
Rottweil P 801	<<locked>>	60%	23641	53%	**02	100%
[Rottweil P 806]*	<<locked>>	70%	11835	27%	**14	80%
SNPE Vectan A0	<<locked>>	61%	15418	35%	**8	94%
SNPE Vectan BA 9	<<locked>>	61%	18347	41%	**30	99%
SNPE Vectan BA10	<<locked>>	62%	24990	57%	**27	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	61%	12995	29%	**2	83%
SNPE Vectan BA9 1/2	<<locked>>	61%	17883	40%	**30	100%
Shooters World Auto Pistol	<<locked>>	60%	25846	58%	**47	91%
[Shooters World Major Pistol]*	<<locked>>	83%	29457	67%	**55	80%
Somchem MP200	<<locked>>	61%	18391	42%	**73	96%
Somchem MS200	<<locked>>	60%	16563	37%	**10	97%
[Somchem S221]*	<<locked>>	63%	20146	46%	**38	80%
[Vihtavuori 3N37]*	<<locked>>	60%	13634	31%	**8	85%
Vihtavuori N310	<<locked>>	60%	27978	63%	**73	100%
Vihtavuori N320	<<locked>>	62%	19696	45%	**43	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	11400	26%	**7	100%
Vihtavuori N330	<<locked>>	60%	16331	37%	**30	100%
Vihtavuori N340	<<locked>>	61%	15925	36%	**07	96%
[Vihtavuori N350]*	<<locked>>	62%	12981	29%	**1	85%
Winchester 231	<<locked>>	61%	25599	58%	**58	100%

Start Load - Barrel Length: 5.50''

Any powder missing? Then click here.

FR ... fill rate of the cartridge in percent

MaxP ... max. pressure of load in psi or bar

% ... max. pressure of load in percent of the maximum allowed pressure for this caliber

V(0) ... muzzle velocity in feet per second (fps) or meters per second (m/s)

z ... powder burnt in percent

[...] *... 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.

👍 ... recommended powder/load for this caliber and bullet combination based on its ballistic performance.

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