Load data for .357 Auto Magnum + .357 | 158gr | Sierra JSP FN

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 158gr \| Sierra JSP FN
Manufacturer SKU:	8340
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.641" \| 16.3mm
Caliber:	.357 Auto Magnum load data
Case Length (l3):	1.299" \| 33.0mm
Cartridge Length (C.O.L.):	1.576" \| 40.0mm
Seated Depth:	0.364" \| 9.2mm
Shank Seated Depth:	0.364" \| 9.2mm
Case Capacity:	35.0 Grains of Water \| 2.27 cm³
Primer Size:	Small Pistol Magnum (SPM)
Max. allowed Pressure:	36985 psi \| 2550 bar
LID:	LID_B5948_C511
Last updated:	2025-01-01

Load data for 66 loads in caliber .357 Auto Magnum with .357 | 158gr | Sierra JSP FN bullet and 33 powder(s). 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>>	78%	32996	89%	**01	100%
ADI APS 450	<<locked>>	63%	32953	89%	**58	100%
[Accurate 4100]*	<<locked>>	80%	32372	88%	**60	84%
Accurate No. 9	<<locked>>	68%	33257	90%	**53	90%
Accurate Solo 1250	<<locked>>	65%	32895	89%	**66	100%
Accurate TCM	<<locked>>	67%	32111	87%	**40	91%
[Alliant 2400]*	<<locked>>	76%	31952	86%	**57	87%
Alliant BLUE DOT	<<locked>>	79%	33083	89%	**53	95%
Alliant POWER PISTOL	<<locked>>	63%	32271	87%	**24	100%
Alliant UNIQUE	<<locked>>	63%	32343	87%	**22	100%
[Hodgdon LilGun]*	<<locked>>	87%	32140	87%	**22	87%
Hodgdon TrailBoss	<<locked>>	96%	21176	57%	**10	100%
Lovex D037.2	<<locked>>	67%	32590	88%	**40	90%
Maxam CSB 1	<<locked>>	68%	33112	90%	**63	100%
Maxam CSB 2	<<locked>>	63%	32518	88%	**50	100%
Maxam CSB 3	<<locked>>	63%	32227	87%	**27	100%
[Ramshot Enforcer]*	<<locked>>	77%	32938	89%	**83	89%
ReloadSwiss RS 14	<<locked>>	94%	19421	52%	**10	100%
ReloadSwiss RS 20	<<locked>>	65%	32692	88%	**22	100%
ReloadSwiss RS 24	<<locked>>	65%	32024	87%	**34	97%
Rottweil P 806	<<locked>>	67%	32024	87%	**21	100%
SNPE Vectan A0	<<locked>>	67%	32401	88%	**89	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	96%	25585	69%	**45	87%
SNPE Vectan BA7 1/2	<<locked>>	72%	33185	90%	**62	100%
Shooters World Heavy Pistol	<<locked>>	67%	32590	88%	**40	90%
Somchem MS200	<<locked>>	63%	32256	87%	**93	100%
Vihtavuori 3N37	<<locked>>	65%	32474	88%	**62	100%
Vihtavuori 3N38	<<locked>>	74%	32140	87%	**21	98%
Vihtavuori N105	<<locked>>	80%	32576	88%	**67	100%
[Vihtavuori N110]*	<<locked>>	96%	32634	88%	**86	88%
Vihtavuori N32C Tin Star	<<locked>>	82%	33025	89%	**52	100%
Vihtavuori N340	<<locked>>	63%	31879	86%	**99	100%
Vihtavuori N350	<<locked>>	68%	32721	88%	**65	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	20450	55%	**65	96%
ADI APS 450	<<locked>>	61%	31183	84%	**29	100%
[Accurate 4100]*	<<locked>>	75%	27253	74%	**58	80%
[Accurate No. 9]*	<<locked>>	61%	25440	69%	**16	86%
Accurate Solo 1250	<<locked>>	61%	29153	79%	**17	100%
[Accurate TCM]*	<<locked>>	61%	25541	69%	**09	87%
[Alliant 2400]*	<<locked>>	66%	23308	63%	**83	81%
[Alliant BLUE DOT]*	<<locked>>	61%	19580	53%	**75	85%
Alliant POWER PISTOL	<<locked>>	61%	30530	83%	**01	99%
Alliant UNIQUE	<<locked>>	61%	30429	82%	**93	100%
[Hodgdon LilGun]*	<<locked>>	80%	24439	66%	**75	81%
Hodgdon TrailBoss	<<locked>>	62%	10834	29%	**4	100%
[Lovex D037.2]*	<<locked>>	61%	25904	70%	**29	86%
Maxam CSB 1	<<locked>>	61%	27746	75%	**84	100%
Maxam CSB 2	<<locked>>	61%	30676	83%	**20	100%
Maxam CSB 3	<<locked>>	61%	30400	82%	**04	100%
[Ramshot Enforcer]*	<<locked>>	66%	21901	59%	**66	81%
ReloadSwiss RS 14	<<locked>>	60%	10008	27%	**4	100%
ReloadSwiss RS 20	<<locked>>	61%	29080	79%	**66	100%
ReloadSwiss RS 24	<<locked>>	61%	27673	75%	**52	95%
Rottweil P 806	<<locked>>	61%	25324	68%	**09	100%
SNPE Vectan A0	<<locked>>	61%	27441	74%	**20	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	86%	19667	53%	**04	80%
SNPE Vectan BA7 1/2	<<locked>>	61%	24424	66%	**17	100%
[Shooters World Heavy Pistol]*	<<locked>>	61%	25904	70%	**29	86%
Somchem MS200	<<locked>>	61%	30414	82%	**70	100%
Vihtavuori 3N37	<<locked>>	61%	29298	79%	**22	100%
Vihtavuori 3N38	<<locked>>	61%	21277	58%	**11	92%
Vihtavuori N105	<<locked>>	61%	17622	48%	**58	92%
[Vihtavuori N110]*	<<locked>>	86%	23540	64%	**22	81%
Vihtavuori N32C Tin Star	<<locked>>	61%	20639	56%	**8	100%
Vihtavuori N340	<<locked>>	61%	30110	81%	**66	100%
Vihtavuori N350	<<locked>>	61%	26194	71%	**66	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