Load data for .357 Magnum + .357 | 125gr | Speer JSP

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

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Speer JSP
Manufacturer SKU:	4011
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.515" \| 13.1mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.239" \| 6.1mm
Shank Seated Depth:	0.239" \| 6.1mm
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_B6217_C513
Last updated:	2025-01-01

Load data for 120 loads in caliber .357 Magnum with .357 | 125gr | Speer JSP bullet and 60 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".

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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>>	95%	37144	85%	**49	98%
ADI AP 70N	<<locked>>	66%	37246	86%	**34	100%
ADI APS 350	<<locked>>	75%	38580	89%	**60	100%
ADI APS 450	<<locked>>	77%	38870	89%	**02	100%
ADI AS 30	<<locked>>	78%	38812	89%	**39	100%
ADI AS 50N	<<locked>>	73%	38276	88%	**81	100%
Accurate No. 2	<<locked>>	74%	37695	87%	**60	100%
Accurate No. 7	<<locked>>	75%	38043	87%	**04	91%
[Accurate No. 9]*	<<locked>>	84%	37971	87%	**98	86%
Accurate Solo 1000	<<locked>>	77%	39102	90%	**75	100%
Accurate Solo 1250	<<locked>>	82%	39131	90%	**34	100%
[Accurate TCM]*	<<locked>>	85%	39030	90%	**11	88%
[Alliant 2400]*	<<locked>>	96%	38740	89%	**37	83%
Alliant BLUE DOT	<<locked>>	97%	37231	86%	**98	90%
Alliant BULLSEYE	<<locked>>	71%	38363	88%	**03	100%
Alliant POWER PISTOL	<<locked>>	79%	37144	85%	**91	98%
Alliant UNIQUE	<<locked>>	80%	37565	86%	**03	100%
Baschieri & Pellagri 100	<<locked>>	76%	37449	86%	**65	100%
Hodgdon Clays	<<locked>>	72%	36434	84%	**53	100%
Hodgdon HS-6	<<locked>>	65%	37173	85%	**26	100%
Hodgdon Longshot	<<locked>>	63%	38551	89%	**35	100%
Hodgdon Universal	<<locked>>	75%	38653	89%	**53	100%
Hodgdon TrailBoss	<<locked>>	96%	16520	38%	**01	100%
Lovex D037.1	<<locked>>	75%	38043	87%	**04	91%
[Lovex D037.2]*	<<locked>>	83%	37971	87%	**98	86%
Lovex S011	<<locked>>	66%	37913	87%	**98	100%
Lovex S020	<<locked>>	71%	36535	84%	**47	100%
Maxam CSB 1	<<locked>>	84%	38130	88%	**24	100%
Maxam CSB 2	<<locked>>	80%	38624	89%	**27	100%
Maxam CSB 3	<<locked>>	79%	38043	87%	**91	100%
Maxam CSB 4	<<locked>>	76%	37695	87%	**68	100%
Maxam CSB 5	<<locked>>	71%	37028	85%	**12	100%
[Ramshot Enforcer]*	<<locked>>	96%	39001	90%	**37	84%
Ramshot Silhouette	<<locked>>	67%	38870	89%	**12	100%
Ramshot True Blue	<<locked>>	62%	38856	89%	**35	100%
ReloadSwiss RS 12	<<locked>>	69%	38029	87%	**04	100%
ReloadSwiss RS 14	<<locked>>	95%	14721	34%	**4	100%
ReloadSwiss RS 20	<<locked>>	82%	38334	88%	**99	100%
ReloadSwiss RS 24	<<locked>>	82%	38174	88%	**08	94%
Rottweil P 801	<<locked>>	66%	39030	90%	**81	100%
Rottweil P 806	<<locked>>	86%	38551	89%	**24	100%
SNPE Vectan A0	<<locked>>	83%	37608	86%	**50	100%
SNPE Vectan BA 9	<<locked>>	75%	37797	87%	**30	100%
SNPE Vectan BA10	<<locked>>	70%	37637	86%	**86	100%
SNPE Vectan BA7 1/2	<<locked>>	89%	38769	89%	**29	100%
SNPE Vectan BA9 1/2	<<locked>>	77%	38159	88%	**37	100%
[Shooters World Heavy Pistol]*	<<locked>>	83%	37971	87%	**98	86%
Shooters World Major Pistol	<<locked>>	75%	38043	87%	**04	91%
Somchem MP200	<<locked>>	74%	38624	89%	**09	100%
Somchem MS200	<<locked>>	77%	36854	85%	**53	100%
Somchem S221	<<locked>>	69%	38043	87%	**72	96%
Vihtavuori 3N37 👍	<<locked>>	81%	38000	87%	**49	100%
Vihtavuori 3N38	<<locked>>	92%	37391	86%	**85	95%
Vihtavuori N105	<<locked>>	96%	33808	78%	**81	97%
Vihtavuori N320	<<locked>>	73%	37405	86%	**71	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	35186	81%	**70	100%
Vihtavuori N330	<<locked>>	73%	36593	84%	**21	100%
Vihtavuori N340	<<locked>>	79%	37811	87%	**73	100%
Vihtavuori N350 👍	<<locked>>	85%	38696	89%	**39	100%
Winchester 231	<<locked>>	63%	37391	86%	**07	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	14692	34%	**73	84%
ADI AP 70N	<<locked>>	61%	32590	75%	**68	100%
ADI APS 350	<<locked>>	61%	28050	64%	**22	100%
ADI APS 450	<<locked>>	61%	26614	61%	**35	100%
ADI AS 30	<<locked>>	61%	26237	60%	**71	100%
ADI AS 50N	<<locked>>	62%	28485	65%	**53	100%
Accurate No. 2	<<locked>>	61%	25019	58%	**80	100%
[Accurate No. 7]*	<<locked>>	61%	22350	51%	**22	82%
[Accurate No. 9]*	<<locked>>	76%	28718	66%	**44	80%
Accurate Solo 1000	<<locked>>	62%	26774	62%	**14	100%
Accurate Solo 1250	<<locked>>	62%	22887	53%	**04	100%
[Accurate TCM]*	<<locked>>	75%	27833	64%	**24	81%
[Alliant 2400]*	<<locked>>	92%	34664	80%	**72	81%
[Alliant BLUE DOT]*	<<locked>>	78%	22234	51%	**06	80%
Alliant BULLSEYE	<<locked>>	61%	28645	66%	**62	100%
Alliant POWER PISTOL	<<locked>>	61%	22133	51%	**09	91%
Alliant UNIQUE	<<locked>>	61%	22829	52%	**60	100%
Baschieri & Pellagri 100	<<locked>>	62%	25483	59%	**98	100%
Hodgdon Clays	<<locked>>	61%	28398	65%	**42	100%
Hodgdon HS-6	<<locked>>	61%	32880	76%	**70	99%
Hodgdon Longshot	<<locked>>	61%	36289	83%	**12	100%
Hodgdon Universal	<<locked>>	61%	27006	62%	**80	100%
Hodgdon TrailBoss	<<locked>>	61%	8238	19%	**8	100%
[Lovex D037.1]*	<<locked>>	61%	22350	51%	**22	82%
[Lovex D037.2]*	<<locked>>	75%	28718	66%	**44	80%
Lovex S011	<<locked>>	61%	32605	75%	**29	100%
Lovex S020	<<locked>>	61%	27151	62%	**06	100%
Maxam CSB 1	<<locked>>	61%	21002	48%	**65	100%
Maxam CSB 2	<<locked>>	60%	22698	52%	**01	100%
Maxam CSB 3	<<locked>>	61%	24091	55%	**98	100%
Maxam CSB 4	<<locked>>	61%	25715	59%	**07	100%
Maxam CSB 5	<<locked>>	61%	29196	67%	**07	100%
[Ramshot Enforcer]*	<<locked>>	91%	32750	75%	**49	81%
Ramshot Silhouette	<<locked>>	61%	32140	74%	**21	100%
Ramshot True Blue	<<locked>>	61%	36666	84%	**03	100%
ReloadSwiss RS 12	<<locked>>	61%	30618	70%	**09	100%
ReloadSwiss RS 14	<<locked>>	60%	7498	17%	**5	99%
ReloadSwiss RS 20	<<locked>>	61%	21277	49%	**37	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	19493	45%	**34	82%
Rottweil P 801	<<locked>>	61%	34026	78%	**16	100%
Rottweil P 806	<<locked>>	61%	15795	36%	**75	91%
SNPE Vectan A0	<<locked>>	61%	21364	49%	**98	100%
SNPE Vectan BA 9	<<locked>>	60%	24932	57%	**40	100%
SNPE Vectan BA10	<<locked>>	61%	30081	69%	**91	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	17898	41%	**48	94%
SNPE Vectan BA9 1/2	<<locked>>	61%	25019	57%	**50	100%
[Shooters World Heavy Pistol]*	<<locked>>	75%	28718	66%	**44	80%
[Shooters World Major Pistol]*	<<locked>>	61%	22350	51%	**22	82%
Somchem MP200	<<locked>>	60%	25773	59%	**12	100%
Somchem MS200	<<locked>>	62%	24004	55%	**60	100%
Somchem S221	<<locked>>	61%	28558	66%	**21	93%
Vihtavuori 3N37	<<locked>>	61%	20827	48%	**40	97%
[Vihtavuori 3N38]*	<<locked>>	67%	17608	40%	**81	81%
[Vihtavuori N105]*	<<locked>>	70%	14982	34%	**55	81%
Vihtavuori N320	<<locked>>	61%	27151	62%	**40	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	16346	38%	**1	100%
Vihtavuori N330	<<locked>>	60%	24860	57%	**53	100%
Vihtavuori N340	<<locked>>	61%	22655	52%	**40	100%
Vihtavuori N350	<<locked>>	61%	19072	44%	**01	96%
Winchester 231	<<locked>>	61%	34925	80%	**81	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