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

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

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 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.365" \| 9.3mm
Shank Seated Depth:	0.365" \| 9.3mm
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:	2025-02-02

Load data for 110 loads in caliber .357 Magnum with .357 | 158gr | Sierra JSP FN bullet and 55 powders such as ADI AP 100, Rottweil P 806, SNPE Vectan BA7 1/2, 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 "My Account " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.
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.

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>>	65%	36738	84%	**04	100%
ADI AS 30	<<locked>>	77%	38870	89%	**35	100%
ADI AS 50N	<<locked>>	72%	37811	87%	**68	100%
Accurate No. 2	<<locked>>	71%	35694	82%	**20	100%
Accurate No. 7	<<locked>>	74%	37188	85%	**88	94%
[Accurate No. 9]*	<<locked>>	84%	39146	90%	**98	89%
Accurate Solo 1000	<<locked>>	76%	38479	88%	**61	100%
Accurate Solo 1250	<<locked>>	79%	37492	86%	**04	100%
Accurate TCM	<<locked>>	83%	38145	88%	**85	90%
[Alliant 2400]*	<<locked>>	94%	37623	86%	**01	85%
Alliant BULLSEYE	<<locked>>	68%	36056	83%	**57	100%
Alliant POWER PISTOL	<<locked>>	79%	37927	87%	**85	99%
Alliant UNIQUE	<<locked>>	79%	38116	88%	**80	100%
Baschieri & Pellagri 100	<<locked>>	75%	37565	86%	**52	100%
Hodgdon Clays	<<locked>>	71%	36172	83%	**50	100%
Hodgdon HS-6	<<locked>>	65%	38479	88%	**25	100%
Hodgdon Universal	<<locked>>	73%	38072	88%	**27	100%
Hodgdon TrailBoss	<<locked>>	91%	15447	35%	**7	100%
Lovex D037.1	<<locked>>	74%	37188	85%	**88	94%
[Lovex D037.2]*	<<locked>>	82%	37971	87%	**91	89%
Lovex S011	<<locked>>	63%	36187	83%	**65	100%
Lovex S020	<<locked>>	71%	36767	84%	**24	100%
Maxam CSB 1	<<locked>>	81%	36550	84%	**91	100%
Maxam CSB 2	<<locked>>	77%	36854	85%	**94	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>>	67%	37130	85%	**81	100%
ReloadSwiss RS 14	<<locked>>	92%	14663	34%	**3	100%
ReloadSwiss RS 20	<<locked>>	79%	36956	85%	**63	100%
ReloadSwiss RS 24	<<locked>>	80%	36521	84%	**65	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>>	86%	37463	86%	**93	100%
SNPE Vectan BA9 1/2	<<locked>>	74%	36840	85%	**04	100%
[Shooters World Heavy Pistol]*	<<locked>>	82%	37971	87%	**91	89%
Shooters World Major Pistol	<<locked>>	74%	37188	85%	**88	94%
Somchem MP200	<<locked>>	72%	37173	85%	**63	100%
Somchem MS200	<<locked>>	77%	37115	85%	**40	100%
Somchem S221	<<locked>>	69%	38609	89%	**65	98%
Vihtavuori 3N37	<<locked>>	79%	37565	86%	**12	100%
Vihtavuori 3N38	<<locked>>	91%	37753	87%	**68	97%
Vihtavuori N105	<<locked>>	95%	34316	79%	**68	98%
Vihtavuori N320	<<locked>>	71%	36999	85%	**58	100%
Vihtavuori N32C Tin Star	<<locked>>	94%	34708	80%	**66	100%
Vihtavuori N330	<<locked>>	74%	37811	87%	**20	100%
Vihtavuori N340	<<locked>>	77%	37173	85%	**47	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 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>>	69%	23844	55%	**58	81%
[Alliant 2400]*	<<locked>>	85%	28732	66%	**66	80%
Alliant BULLSEYE	<<locked>>	62%	30371	70%	**84	100%
Alliant POWER PISTOL	<<locked>>	61%	22234	51%	**29	94%
Alliant UNIQUE	<<locked>>	60%	22771	52%	**76	100%
Baschieri & Pellagri 100	<<locked>>	62%	26121	60%	**24	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 TrailBoss	<<locked>>	61%	8398	19%	**6	100%
[Lovex D037.1]*	<<locked>>	61%	22655	52%	**52	85%
[Lovex D037.2]*	<<locked>>	71%	25353	58%	**98	81%
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 14	<<locked>>	62%	8224	19%	**9	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%
[Shooters World Heavy Pistol]*	<<locked>>	71%	25353	58%	**98	81%
[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>>	64%	12734	29%	**5	81%
Vihtavuori N320	<<locked>>	61%	27731	64%	**53	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	16694	38%	**3	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.