Load data for .357 Magnum + .356 | 123gr | LOS HP

Recommended Powder(s): Vihtavuori 3N37, Vihtavuori N350

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.356 \| 123gr \| LOS HP
Bullet Weight:	123gr \| 8.0g
Bullet Diameter:	0.356" \| 9.04mm
Bullet Length:	0.550" \| 14.0mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.274" \| 7.0mm
Shank Seated Depth:	0.274" \| 7.0mm
Case Capacity:	25.6 Grains of Water \| 1.66 cm³
Primer Size:	Small Pistol Magnum (SPM)
Max. allowed Pressure:	43511 psi \| 3000 bar
LID:	LID_B3510_C513
Last updated:	2025-01-01

Load data for 118 loads in caliber .357 Magnum with .356 | 123gr | LOS HP bullet and 59 powders such as Vihtavuori 3N37, Vihtavuori N350. 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".

Go to the bottom of the "Dashboard " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
We recommend you limit powder range to relevant brands to speed up re-calculation of results
Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

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>>	95%	35447	81%	**19	98%
ADI AP 70N	<<locked>>	67%	37304	86%	**34	100%
ADI APS 350	<<locked>>	77%	39131	90%	**73	100%
ADI APS 450	<<locked>>	75%	37028	85%	**76	100%
ADI AS 30	<<locked>>	78%	38406	88%	**42	100%
ADI AS 50N	<<locked>>	74%	38087	88%	**78	100%
Accurate No. 2	<<locked>>	74%	37405	86%	**60	100%
Accurate No. 7	<<locked>>	76%	37942	87%	**14	91%
[Accurate No. 9]*	<<locked>>	84%	37434	86%	**85	84%
Accurate Solo 1000	<<locked>>	77%	38638	89%	**68	100%
Accurate Solo 1250	<<locked>>	82%	38914	89%	**37	100%
[Accurate TCM]*	<<locked>>	85%	38029	87%	**91	86%
[Alliant BLUE DOT]*	<<locked>>	97%	36143	83%	**68	89%
Alliant BULLSEYE	<<locked>>	71%	38014	87%	**99	100%
Alliant POWER PISTOL	<<locked>>	81%	38566	89%	**14	98%
Alliant UNIQUE	<<locked>>	80%	37391	86%	**96	100%
Baschieri & Pellagri 100	<<locked>>	76%	37188	85%	**62	100%
Hodgdon Clays	<<locked>>	73%	37043	85%	**57	100%
Hodgdon HS-6	<<locked>>	66%	37434	86%	**29	100%
Hodgdon Longshot	<<locked>>	63%	37724	87%	**32	100%
Hodgdon Universal	<<locked>>	75%	38508	89%	**47	100%
Hodgdon CFE Pistol	<<locked>>	76%	37144	85%	**34	100%
Hodgdon TrailBoss	<<locked>>	93%	15606	36%	**1	100%
Lovex D037.1	<<locked>>	76%	37942	87%	**14	91%
[Lovex D037.2]*	<<locked>>	84%	38290	88%	**01	85%
Lovex S011	<<locked>>	66%	37318	86%	**91	100%
Lovex S020	<<locked>>	73%	37898	87%	**60	100%
Maxam CSB 1	<<locked>>	85%	37826	87%	**17	100%
Maxam CSB 2	<<locked>>	79%	37159	85%	**11	100%
Maxam CSB 3	<<locked>>	79%	37637	87%	**91	100%
Maxam CSB 4	<<locked>>	78%	38580	89%	**81	100%
Maxam CSB 5	<<locked>>	71%	36434	84%	**02	100%
Ramshot Silhouette	<<locked>>	67%	37956	87%	**06	100%
Ramshot True Blue	<<locked>>	62%	38319	88%	**26	100%
ReloadSwiss RS 12	<<locked>>	69%	37855	87%	**98	100%
ReloadSwiss RS 14	<<locked>>	96%	15316	35%	**04	100%
ReloadSwiss RS 20	<<locked>>	83%	38247	88%	**06	100%
ReloadSwiss RS 24	<<locked>>	83%	37884	87%	**91	93%
Rottweil P 801	<<locked>>	66%	38870	89%	**81	100%
Rottweil P 806	<<locked>>	88%	38406	88%	**27	100%
SNPE Vectan A0	<<locked>>	84%	37492	86%	**53	100%
SNPE Vectan BA 9	<<locked>>	76%	37782	87%	**24	100%
SNPE Vectan BA10	<<locked>>	70%	37014	85%	**76	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	90%	39117	90%	**32	100%
SNPE Vectan BA9 1/2	<<locked>>	77%	38145	88%	**40	100%
[Shooters World Heavy Pistol]*	<<locked>>	84%	38290	88%	**01	85%
Shooters World Major Pistol	<<locked>>	76%	37942	87%	**14	91%
Somchem MP200	<<locked>>	75%	38609	89%	**06	100%
Somchem MS200	<<locked>>	78%	36840	85%	**60	100%
Somchem S221	<<locked>>	69%	38029	87%	**75	96%
Vihtavuori 3N37 👍	<<locked>>	82%	38653	89%	**55	100%
Vihtavuori 3N38	<<locked>>	94%	38276	88%	**88	94%
Vihtavuori N105	<<locked>>	95%	31024	71%	**35	95%
Vihtavuori N320	<<locked>>	73%	37101	85%	**65	100%
Vihtavuori N32C Tin Star	<<locked>>	97%	35331	81%	**63	100%
Vihtavuori N330	<<locked>>	77%	38899	89%	**50	100%
Vihtavuori N340	<<locked>>	80%	37869	87%	**70	100%
Vihtavuori N350 👍	<<locked>>	86%	38812	89%	**52	100%
Winchester 231	<<locked>>	64%	37449	86%	**11	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	14707	34%	**70	83%
ADI AP 70N	<<locked>>	62%	32372	74%	**65	100%
ADI APS 350	<<locked>>	62%	28268	65%	**29	100%
ADI APS 450	<<locked>>	62%	27122	62%	**45	100%
ADI AS 30	<<locked>>	61%	25512	59%	**65	100%
ADI AS 50N	<<locked>>	61%	28036	64%	**47	100%
Accurate No. 2	<<locked>>	61%	24584	57%	**66	100%
[Accurate No. 7]*	<<locked>>	61%	22191	51%	**16	81%
[Accurate No. 9]*	<<locked>>	79%	31328	72%	**80	81%
Accurate Solo 1000	<<locked>>	61%	26121	60%	**04	100%
Accurate Solo 1250	<<locked>>	61%	22510	52%	**98	100%
[Accurate TCM]*	<<locked>>	76%	28631	66%	**34	81%
[Alliant BLUE DOT]*	<<locked>>	81%	24091	55%	**39	81%
Alliant BULLSEYE	<<locked>>	61%	28152	65%	**52	100%
[Alliant POWER PISTOL]*	<<locked>>	61%	21393	49%	**86	89%
Alliant UNIQUE	<<locked>>	61%	22452	52%	**50	100%
Baschieri & Pellagri 100	<<locked>>	61%	24961	57%	**91	100%
Hodgdon Clays	<<locked>>	62%	28718	66%	**48	100%
Hodgdon HS-6	<<locked>>	61%	31183	72%	**34	99%
Hodgdon Longshot	<<locked>>	61%	35621	82%	**99	100%
Hodgdon Universal	<<locked>>	61%	26818	62%	**83	100%
Hodgdon CFE Pistol	<<locked>>	61%	24279	56%	**37	100%
Hodgdon TrailBoss	<<locked>>	61%	8543	20%	**1	100%
[Lovex D037.1]*	<<locked>>	61%	22191	51%	**16	81%
[Lovex D037.2]*	<<locked>>	78%	30240	69%	**73	80%
Lovex S011	<<locked>>	61%	32010	74%	**19	100%
Lovex S020	<<locked>>	60%	25715	59%	**83	100%
Maxam CSB 1	<<locked>>	60%	20479	47%	**55	100%
Maxam CSB 2	<<locked>>	62%	23250	53%	**07	100%
Maxam CSB 3	<<locked>>	61%	23467	54%	**91	100%
Maxam CSB 4	<<locked>>	62%	26165	60%	**14	100%
Maxam CSB 5	<<locked>>	61%	28442	65%	**98	100%
Ramshot Silhouette	<<locked>>	61%	30966	71%	**04	100%
Ramshot True Blue	<<locked>>	61%	35926	83%	**03	100%
ReloadSwiss RS 12	<<locked>>	61%	30356	70%	**06	100%
ReloadSwiss RS 14	<<locked>>	60%	7919	18%	**1	99%
ReloadSwiss RS 20	<<locked>>	61%	20827	48%	**27	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	19014	44%	**20	80%
Rottweil P 801	<<locked>>	61%	33779	78%	**12	100%
Rottweil P 806	<<locked>>	61%	15693	36%	**75	90%
SNPE Vectan A0	<<locked>>	61%	21219	49%	**88	100%
SNPE Vectan BA 9	<<locked>>	61%	24656	57%	**34	100%
SNPE Vectan BA10	<<locked>>	61%	29414	68%	**75	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	17782	41%	**45	93%
SNPE Vectan BA9 1/2	<<locked>>	61%	24569	56%	**37	100%
[Shooters World Heavy Pistol]*	<<locked>>	78%	30240	69%	**73	80%
[Shooters World Major Pistol]*	<<locked>>	61%	22191	51%	**16	81%
Somchem MP200	<<locked>>	61%	25599	59%	**09	100%
Somchem MS200	<<locked>>	62%	23873	55%	**53	100%
Somchem S221	<<locked>>	61%	28297	65%	**11	92%
Vihtavuori 3N37	<<locked>>	61%	20769	48%	**40	96%
[Vihtavuori 3N38]*	<<locked>>	68%	17883	41%	**88	80%
[Vihtavuori N105]*	<<locked>>	72%	15621	36%	**65	81%
Vihtavuori N320	<<locked>>	61%	26484	61%	**24	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	16099	37%	**4	100%
Vihtavuori N330	<<locked>>	60%	24294	56%	**50	100%
Vihtavuori N340	<<locked>>	61%	22205	51%	**27	100%
Vihtavuori N350	<<locked>>	61%	19029	44%	**98	96%
Winchester 231	<<locked>>	61%	34708	80%	**71	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