Load data for .357 Magnum + .357 | 158gr | Speer JSP

Recommended Powder(s): ADI AP 100, Rottweil P 806, SNPE Vectan BA7 1/2, Vihtavuori N105, Vihtavuori N350

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 158gr \| Speer JSP
Manufacturer SKU:	4217
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.630" \| 16.0mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.354" \| 9.0mm
Shank Seated Depth:	0.354" \| 9.0mm
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_B6224_C513
Last updated:	2025-02-02

Load data for 110 loads in caliber .357 Magnum with .357 | 158gr | Speer JSP bullet and 55 powders such as ADI AP 100, Rottweil P 806, SNPE Vectan BA7 1/2, Vihtavuori N105, 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.

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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>>	96%	39131	90%	**62	100%
ADI AP 70N	<<locked>>	66%	38885	89%	**34	100%
ADI AS 30	<<locked>>	76%	38043	87%	**32	100%
ADI AS 50N	<<locked>>	71%	36999	85%	**61	100%
Accurate No. 2	<<locked>>	73%	38043	87%	**50	100%
Accurate No. 7	<<locked>>	74%	37231	86%	**91	94%
[Accurate No. 9]*	<<locked>>	83%	38928	89%	**11	89%
Accurate Solo 1000	<<locked>>	73%	36013	83%	**38	100%
Accurate Solo 1250	<<locked>>	77%	36492	84%	**98	100%
Accurate TCM	<<locked>>	83%	38580	89%	**94	90%
[Alliant 2400]*	<<locked>>	93%	37420	86%	**01	85%
Alliant BULLSEYE	<<locked>>	70%	38406	88%	**80	100%
Alliant POWER PISTOL	<<locked>>	79%	38363	88%	**98	99%
Alliant UNIQUE	<<locked>>	79%	38798	89%	**96	100%
Baschieri & Pellagri 100	<<locked>>	74%	36753	84%	**48	100%
Hodgdon Clays	<<locked>>	74%	38696	89%	**79	100%
Hodgdon HS-6	<<locked>>	65%	38827	89%	**29	100%
Hodgdon Universal	<<locked>>	74%	38885	89%	**34	100%
Hodgdon TrailBoss	<<locked>>	95%	16911	39%	**6	100%
Lovex D037.1	<<locked>>	74%	37231	86%	**91	94%
[Lovex D037.2]*	<<locked>>	82%	37753	87%	**91	89%
Lovex S011	<<locked>>	64%	36970	85%	**75	100%
Lovex S020	<<locked>>	72%	39073	90%	**53	100%
Maxam CSB 1	<<locked>>	81%	37246	86%	**01	100%
Maxam CSB 2	<<locked>>	78%	37579	86%	**01	100%
Maxam CSB 3	<<locked>>	78%	38943	89%	**94	100%
Maxam CSB 4	<<locked>>	75%	37826	87%	**65	100%
Maxam CSB 5	<<locked>>	68%	35737	82%	**99	100%
[Ramshot Enforcer]*	<<locked>>	94%	38305	88%	**34	87%
Ramshot Silhouette	<<locked>>	66%	38856	89%	**93	100%
ReloadSwiss RS 12	<<locked>>	68%	37811	87%	**91	100%
ReloadSwiss RS 14	<<locked>>	97%	15911	37%	**3	100%
ReloadSwiss RS 20	<<locked>>	79%	37652	87%	**70	100%
ReloadSwiss RS 24	<<locked>>	81%	38145	88%	**94	96%
Rottweil P 801	<<locked>>	64%	38812	89%	**68	100%
Rottweil P 806 👍	<<locked>>	85%	39088	90%	**04	100%
SNPE Vectan A0	<<locked>>	83%	39059	90%	**53	100%
SNPE Vectan BA 9	<<locked>>	75%	39102	90%	**27	100%
SNPE Vectan BA10	<<locked>>	68%	36390	84%	**79	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	86%	37826	87%	**02	100%
SNPE Vectan BA9 1/2	<<locked>>	76%	39102	90%	**30	100%
[Shooters World Heavy Pistol]*	<<locked>>	82%	37753	87%	**91	89%
Shooters World Major Pistol	<<locked>>	74%	37231	86%	**91	94%
Somchem MP200	<<locked>>	72%	37797	87%	**76	100%
Somchem MS200	<<locked>>	77%	37826	87%	**53	100%
Somchem S221	<<locked>>	68%	38827	89%	**71	98%
Vihtavuori 3N37	<<locked>>	79%	37985	87%	**25	100%
Vihtavuori 3N38	<<locked>>	90%	36622	84%	**55	96%
Vihtavuori N105 👍	<<locked>>	95%	34519	79%	**75	99%
Vihtavuori N320	<<locked>>	72%	37811	87%	**68	100%
Vihtavuori N32C Tin Star	<<locked>>	97%	36738	84%	**86	100%
Vihtavuori N330	<<locked>>	74%	38435	88%	**27	100%
Vihtavuori N340	<<locked>>	76%	36318	83%	**40	100%
Vihtavuori N350 👍	<<locked>>	83%	38377	88%	**22	100%
Winchester 231	<<locked>>	64%	39102	90%	**14	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	15534	36%	**1	89%
ADI AP 70N	<<locked>>	61%	33069	76%	**71	100%
ADI AS 30	<<locked>>	60%	26295	60%	**7	100%
ADI AS 50N	<<locked>>	60%	28297	65%	**60	100%
Accurate No. 2	<<locked>>	61%	25947	60%	**02	100%
[Accurate No. 7]*	<<locked>>	61%	22916	53%	**61	86%
[Accurate No. 9]*	<<locked>>	70%	24685	57%	**81	81%
Accurate Solo 1000	<<locked>>	62%	27456	63%	**37	100%
Accurate Solo 1250	<<locked>>	61%	23018	53%	**27	100%
[Accurate TCM]*	<<locked>>	67%	22568	52%	**45	81%
[Alliant 2400]*	<<locked>>	85%	28921	66%	**73	80%
Alliant BULLSEYE	<<locked>>	61%	29646	68%	**78	100%
Alliant POWER PISTOL	<<locked>>	61%	22510	52%	**35	94%
Alliant UNIQUE	<<locked>>	61%	23467	54%	**86	100%
Baschieri & Pellagri 100	<<locked>>	61%	25585	59%	**17	100%
Hodgdon Clays	<<locked>>	61%	29124	67%	**8	100%
Hodgdon HS-6	<<locked>>	61%	33605	77%	**70	100%
Hodgdon Universal	<<locked>>	61%	27717	64%	**06	100%
Hodgdon TrailBoss	<<locked>>	66%	9529	22%	**2	100%
[Lovex D037.1]*	<<locked>>	61%	22916	53%	**61	86%
[Lovex D037.2]*	<<locked>>	70%	25411	58%	**01	81%
Lovex S011	<<locked>>	61%	33866	78%	**45	100%
Lovex S020	<<locked>>	61%	27369	63%	**15	100%
Maxam CSB 1	<<locked>>	61%	22060	51%	**07	100%
Maxam CSB 2	<<locked>>	61%	24105	55%	**43	100%
Maxam CSB 3	<<locked>>	61%	25092	58%	**30	100%
Maxam CSB 4	<<locked>>	60%	26426	61%	**30	100%
Maxam CSB 5	<<locked>>	61%	29704	68%	**30	100%
[Ramshot Enforcer]*	<<locked>>	85%	27224	63%	**66	81%
Ramshot Silhouette	<<locked>>	61%	33533	77%	**34	100%
ReloadSwiss RS 12	<<locked>>	62%	31952	73%	**22	100%
ReloadSwiss RS 14	<<locked>>	61%	8166	19%	**6	100%
ReloadSwiss RS 20	<<locked>>	61%	22466	52%	**76	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	20088	46%	**89	86%
Rottweil P 801	<<locked>>	62%	35723	82%	**35	100%
Rottweil P 806	<<locked>>	61%	17027	39%	**60	95%
SNPE Vectan A0	<<locked>>	61%	22075	51%	**37	100%
SNPE Vectan BA 9	<<locked>>	61%	26223	60%	**76	100%
SNPE Vectan BA10	<<locked>>	61%	30676	71%	**17	100%
SNPE Vectan BA7 1/2	<<locked>>	62%	19160	44%	**20	97%
SNPE Vectan BA9 1/2	<<locked>>	61%	25672	59%	**70	100%
[Shooters World Heavy Pistol]*	<<locked>>	70%	25411	58%	**01	81%
[Shooters World Major Pistol]*	<<locked>>	61%	22916	53%	**61	86%
Somchem MP200	<<locked>>	61%	27499	63%	**48	100%
Somchem MS200	<<locked>>	62%	24860	57%	**89	100%
Somchem S221	<<locked>>	61%	29747	68%	**50	96%
Vihtavuori 3N37	<<locked>>	61%	21857	50%	**93	99%
[Vihtavuori 3N38]*	<<locked>>	60%	14823	34%	**5	81%
[Vihtavuori N105]*	<<locked>>	64%	13010	30%	**8	82%
Vihtavuori N320	<<locked>>	62%	28616	66%	**66	100%
Vihtavuori N32C Tin Star	<<locked>>	60%	16346	38%	**3	100%
Vihtavuori N330	<<locked>>	62%	26992	62%	**99	100%
Vihtavuori N340	<<locked>>	61%	23525	54%	**73	100%
Vihtavuori N350	<<locked>>	61%	19725	45%	**50	98%
Winchester 231	<<locked>>	61%	36114	83%	**84	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