Load data for .357 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:	<<locked>>
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
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_B5948_C513
Last updated:	2026-01-21

Load data for 122 loads in caliber .357 Magnum with .357 | 158gr | Sierra JSP FN bullet and 61 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".

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>>	96%	38827	89%	**52	100%
ADI AP 70N	<<locked>>	66%	38072	88%	**27	100%
ADI APS 350	<<locked>>	75%	38682	89%	**66	100%
ADI APS 450	<<locked>>	76%	38899	89%	**96	100%
ADI AS 30	<<locked>>	77%	38870	89%	**35	100%
ADI AS 50N	<<locked>>	72%	37811	87%	**68	100%
Accurate No. 2	<<locked>>	72%	37246	86%	**40	100%
Accurate No. 7	<<locked>>	75%	38450	88%	**07	94%
[Accurate No. 9]*	<<locked>>	84%	39146	90%	**98	89%
Accurate Solo 1000	<<locked>>	76%	38479	88%	**61	100%
Accurate Solo 1250	<<locked>>	80%	38972	90%	**17	100%
Accurate TCM	<<locked>>	83%	38145	88%	**85	90%
[Alliant 2400]*	<<locked>>	95%	38551	89%	**17	86%
Alliant BLUE DOT	<<locked>>	97%	38189	88%	**88	93%
Alliant BULLSEYE	<<locked>>	69%	37608	86%	**70	100%
Alliant POWER PISTOL	<<locked>>	79%	37927	87%	**85	99%
Alliant Sport Pistol	<<locked>>	65%	37971	87%	**80	100%
Alliant UNIQUE	<<locked>>	79%	38116	88%	**80	100%
Baschieri & Pellagri 100	<<locked>>	75%	37565	86%	**52	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	94%	37956	87%	**68	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	72%	38566	89%	**84	100%
Hodgdon Clays	<<locked>>	73%	37869	87%	**66	100%
Hodgdon HS-6	<<locked>>	65%	38479	88%	**25	100%
Hodgdon Universal	<<locked>>	73%	38072	88%	**27	100%
Hodgdon CFE Pistol	<<locked>>	75%	37913	87%	**20	100%
Lovex D037.1	<<locked>>	75%	38450	88%	**07	94%
[Lovex D037.2]*	<<locked>>	83%	39146	90%	**98	89%
Lovex S011	<<locked>>	65%	37782	87%	**78	100%
Lovex S020	<<locked>>	72%	38522	89%	**40	100%
Maxam CSB 1	<<locked>>	83%	38043	87%	**04	100%
Maxam CSB 2	<<locked>>	79%	38479	88%	**07	100%
Maxam CSB 3	<<locked>>	78%	38218	88%	**84	100%
Maxam CSB 4	<<locked>>	76%	38754	89%	**71	100%
Maxam CSB 5	<<locked>>	71%	38116	88%	**15	100%
[Ramshot Enforcer]*	<<locked>>	95%	38116	88%	**17	87%
Ramshot Silhouette	<<locked>>	66%	38348	88%	**89	100%
ReloadSwiss RS 12	<<locked>>	69%	38464	88%	**94	100%
ReloadSwiss RS 20	<<locked>>	81%	38508	88%	**76	100%
ReloadSwiss RS 24	<<locked>>	81%	37971	87%	**88	96%
Rottweil P 801	<<locked>>	64%	37840	87%	**58	100%
Rottweil P 806 👍	<<locked>>	86%	38928	89%	**01	100%
SNPE Vectan A0	<<locked>>	83%	38653	89%	**50	100%
SNPE Vectan BA 9	<<locked>>	75%	38537	89%	**14	100%
SNPE Vectan BA10	<<locked>>	71%	38885	89%	**96	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	88%	38769	89%	**09	100%
SNPE Vectan BA9 1/2	<<locked>>	76%	38392	88%	**17	100%
SNPE Vectan SP 2 👍	<<locked>>	75%	39146	90%	**98	100%
[Shooters World Heavy Pistol]*	<<locked>>	83%	39146	90%	**98	89%
Shooters World Major Pistol	<<locked>>	75%	38450	88%	**07	94%
Somchem MP200	<<locked>>	74%	38667	89%	**83	100%
Somchem MS200	<<locked>>	78%	38667	89%	**60	100%
Somchem S221	<<locked>>	69%	38609	89%	**65	98%
Vihtavuori 3N37	<<locked>>	81%	39001	90%	**32	100%
Vihtavuori 3N38	<<locked>>	93%	39044	90%	**88	97%
Vihtavuori N105 👍	<<locked>>	97%	35491	82%	**91	99%
Vihtavuori N320	<<locked>>	73%	38595	89%	**71	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	36187	83%	**79	100%
Vihtavuori N330	<<locked>>	74%	37811	87%	**20	100%
Vihtavuori N340	<<locked>>	79%	38827	89%	**60	100%
Vihtavuori N350	<<locked>>	83%	37913	87%	**09	100%
Winchester 231	<<locked>>	63%	38435	88%	**01	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	15127	35%	**5	88%
ADI AP 70N	<<locked>>	62%	33707	77%	**78	100%
ADI APS 350	<<locked>>	62%	29167	67%	**5	100%
ADI APS 450	<<locked>>	61%	27108	62%	**8	100%
ADI AS 30	<<locked>>	61%	26731	61%	**7	100%
ADI AS 50N	<<locked>>	61%	28805	66%	**63	100%
Accurate No. 2	<<locked>>	62%	26542	61%	**09	100%
[Accurate No. 7]*	<<locked>>	61%	22655	52%	**52	85%
[Accurate No. 9]*	<<locked>>	70%	24250	56%	**78	80%
Accurate Solo 1000	<<locked>>	61%	26643	61%	**24	100%
Accurate Solo 1250	<<locked>>	62%	23525	54%	**33	100%
[Accurate TCM]*	<<locked>>	68%	23119	53%	**48	81%
[Alliant 2400]*	<<locked>>	85%	28732	66%	**66	80%
[Alliant BLUE DOT]*	<<locked>>	72%	19203	44%	**63	81%
Alliant BULLSEYE	<<locked>>	62%	30371	70%	**84	100%
Alliant POWER PISTOL	<<locked>>	61%	22234	51%	**29	94%
Alliant Sport Pistol	<<locked>>	61%	33518	77%	**24	100%
Alliant UNIQUE	<<locked>>	60%	22771	52%	**76	100%
Baschieri & Pellagri 100	<<locked>>	62%	26121	60%	**24	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	64%	18188	42%	**2	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	28021	64%	**73	100%
Hodgdon Clays	<<locked>>	62%	29689	68%	**8	100%
Hodgdon HS-6	<<locked>>	61%	33214	76%	**57	100%
Hodgdon Universal	<<locked>>	60%	27050	62%	**89	100%
Hodgdon CFE Pistol	<<locked>>	60%	25280	58%	**63	100%
[Lovex D037.1]*	<<locked>>	61%	22655	52%	**52	85%
[Lovex D037.2]*	<<locked>>	70%	24250	56%	**78	80%
Lovex S011	<<locked>>	60%	33025	76%	**29	100%
Lovex S020	<<locked>>	62%	28036	64%	**22	100%
Maxam CSB 1	<<locked>>	60%	21437	49%	**4	100%
Maxam CSB 2	<<locked>>	60%	23409	54%	**30	100%
Maxam CSB 3	<<locked>>	60%	24308	56%	**20	100%
Maxam CSB 4	<<locked>>	61%	26948	62%	**33	100%
Maxam CSB 5	<<locked>>	60%	28848	66%	**14	100%
[Ramshot Enforcer]*	<<locked>>	85%	27296	63%	**57	80%
Ramshot Silhouette	<<locked>>	61%	33112	76%	**30	100%
ReloadSwiss RS 12	<<locked>>	61%	31096	71%	**15	100%
ReloadSwiss RS 20	<<locked>>	61%	21727	50%	**63	100%
[ReloadSwiss RS 24]*	<<locked>>	62%	20494	47%	**89	86%
Rottweil P 801	<<locked>>	61%	35099	81%	**29	100%
Rottweil P 806	<<locked>>	61%	16737	38%	**50	95%
SNPE Vectan A0	<<locked>>	61%	21466	49%	**20	100%
SNPE Vectan BA 9	<<locked>>	60%	25643	59%	**66	100%
SNPE Vectan BA10	<<locked>>	60%	29863	69%	**04	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	18739	43%	**07	97%
SNPE Vectan BA9 1/2	<<locked>>	62%	26223	60%	**76	100%
SNPE Vectan SP 2	<<locked>>	61%	24584	57%	**88	97%
[Shooters World Heavy Pistol]*	<<locked>>	70%	24250	56%	**78	80%
[Shooters World Major Pistol]*	<<locked>>	61%	22655	52%	**52	85%
Somchem MP200	<<locked>>	61%	26919	62%	**35	100%
Somchem MS200	<<locked>>	61%	24352	56%	**76	100%
Somchem S221	<<locked>>	61%	29428	68%	**37	95%
Vihtavuori 3N37	<<locked>>	61%	21553	50%	**86	99%
[Vihtavuori 3N38]*	<<locked>>	61%	15171	35%	**5	81%
[Vihtavuori N105]*	<<locked>>	63%	12227	28%	**9	80%
Vihtavuori N320	<<locked>>	61%	27731	64%	**53	100%
Vihtavuori N32C Tin Star	<<locked>>	74%	22640	52%	**8	100%
Vihtavuori N330	<<locked>>	61%	26078	60%	**86	100%
Vihtavuori N340	<<locked>>	62%	23960	55%	**79	100%
Vihtavuori N350	<<locked>>	60%	19232	44%	**37	98%
Winchester 231	<<locked>>	61%	35549	82%	**75	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