Load data for .357 Magnum + .357 | 125gr | Sierra JSP FN

Recommended Powder(s): Rottweil P 806, SNPE Vectan BA7 1/2, Vihtavuori 3N37, Vihtavuori N350

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Sierra JSP FN
Manufacturer SKU:	8310
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.532" \| 13.5mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.256" \| 6.5mm
Shank Seated Depth:	0.256" \| 6.5mm
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_B5945_C513
Last updated:	2025-02-02

Load data for 120 loads in caliber .357 Magnum with .357 | 125gr | Sierra JSP FN bullet and 60 powders such as Rottweil P 806, SNPE Vectan BA7 1/2, 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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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%	37289	86%	**52	98%
ADI AP 70N	<<locked>>	71%	42511	98%	**86	100%
ADI AS 30	<<locked>>	81%	41321	95%	**68	100%
ADI AS 50N	<<locked>>	77%	40872	94%	**14	100%
Accurate No. 2	<<locked>>	77%	40582	93%	**96	100%
Accurate No. 5	<<locked>>	64%	43091	99%	**24	100%
Accurate No. 7	<<locked>>	79%	41989	96%	**70	93%
[Accurate No. 9]*	<<locked>>	87%	41974	96%	**47	87%
Accurate Solo 1000	<<locked>>	80%	41684	96%	**01	100%
Accurate Solo 1250	<<locked>>	85%	42003	97%	**63	100%
[Accurate TCM]*	<<locked>>	88%	43352	100%	**60	89%
Alliant BULLSEYE	<<locked>>	74%	40799	94%	**32	100%
Alliant POWER PISTOL	<<locked>>	85%	43410	100%	**86	99%
Alliant UNIQUE	<<locked>>	86%	42598	98%	**65	100%
Baschieri & Pellagri 100	<<locked>>	82%	42801	98%	**17	100%
Hodgdon Clays	<<locked>>	79%	41945	96%	**09	100%
Hodgdon HS-6	<<locked>>	70%	43076	99%	**04	100%
Hodgdon Longshot	<<locked>>	66%	42235	97%	**81	100%
Hodgdon Universal	<<locked>>	78%	41075	94%	**76	100%
Hodgdon TrailBoss	<<locked>>	96%	16273	37%	**4	100%
Lovex D036	<<locked>>	64%	43047	99%	**24	100%
Lovex D037.1	<<locked>>	79%	41989	96%	**70	93%
[Lovex D037.2]*	<<locked>>	86%	40901	94%	**34	87%
Lovex S011	<<locked>>	68%	40582	93%	**24	100%
Lovex S020	<<locked>>	77%	42105	97%	**99	100%
Maxam CSB 1	<<locked>>	90%	43410	100%	**76	100%
Maxam CSB 2	<<locked>>	83%	41147	95%	**47	100%
Maxam CSB 3	<<locked>>	85%	43120	99%	**53	100%
Maxam CSB 4	<<locked>>	82%	43134	99%	**30	100%
Maxam CSB 5	<<locked>>	77%	42569	98%	**68	100%
[Ramshot Enforcer]*	<<locked>>	97%	38203	88%	**21	83%
Ramshot Silhouette	<<locked>>	69%	41336	95%	**42	100%
Ramshot True Blue	<<locked>>	65%	41597	96%	**68	100%
ReloadSwiss RS 12	<<locked>>	74%	43424	100%	**60	100%
ReloadSwiss RS 14	<<locked>>	97%	15185	35%	**04	100%
ReloadSwiss RS 20	<<locked>>	85%	40915	94%	**29	100%
ReloadSwiss RS 24	<<locked>>	87%	43047	99%	**63	95%
Rottweil P 801	<<locked>>	69%	41466	95%	**01	100%
Rottweil P 806 👍	<<locked>>	91%	43511	100%	**90	100%
SNPE Vectan A0	<<locked>>	89%	42482	98%	**06	100%
SNPE Vectan BA 9	<<locked>>	81%	42931	99%	**73	100%
SNPE Vectan BA10	<<locked>>	77%	42844	98%	**42	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	92%	41278	95%	**58	100%
SNPE Vectan BA9 1/2	<<locked>>	83%	43497	100%	**90	100%
Shooters World Auto Pistol	<<locked>>	64%	43047	99%	**24	100%
[Shooters World Heavy Pistol]*	<<locked>>	86%	40901	94%	**34	87%
Shooters World Major Pistol	<<locked>>	79%	41989	96%	**70	93%
Somchem MP200	<<locked>>	77%	40988	94%	**26	100%
Somchem MS200	<<locked>>	83%	41901	96%	**09	100%
Somchem S221	<<locked>>	73%	42989	99%	**37	98%
Vihtavuori 3N37 👍	<<locked>>	86%	43221	99%	**04	100%
Vihtavuori 3N38	<<locked>>	96%	40205	92%	**14	95%
Vihtavuori N105	<<locked>>	95%	31792	73%	**49	96%
Vihtavuori N310	<<locked>>	65%	40741	94%	**16	100%
Vihtavuori N320	<<locked>>	79%	43221	99%	**30	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	35186	81%	**63	100%
Vihtavuori N330	<<locked>>	79%	41901	96%	**80	100%
Vihtavuori N340	<<locked>>	84%	43424	100%	**32	100%
Vihtavuori N350 👍	<<locked>>	88%	41176	95%	**72	100%
Winchester 231	<<locked>>	68%	42844	98%	**60	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	14533	33%	**63	83%
ADI AP 70N	<<locked>>	61%	32387	74%	**58	100%
ADI AS 30	<<locked>>	61%	25686	59%	**61	100%
ADI AS 50N	<<locked>>	62%	28036	64%	**47	100%
Accurate No. 2	<<locked>>	61%	24729	57%	**66	100%
Accurate No. 5	<<locked>>	61%	38116	88%	**55	99%
[Accurate No. 7]*	<<locked>>	61%	21712	50%	**02	81%
[Accurate No. 9]*	<<locked>>	78%	29747	68%	**60	81%
Accurate Solo 1000	<<locked>>	62%	26310	60%	**98	100%
Accurate Solo 1250	<<locked>>	61%	22481	52%	**98	100%
[Accurate TCM]*	<<locked>>	75%	27224	63%	**01	80%
Alliant BULLSEYE	<<locked>>	61%	28326	65%	**48	100%
Alliant POWER PISTOL	<<locked>>	61%	21176	49%	**73	90%
Alliant UNIQUE	<<locked>>	61%	22510	52%	**47	100%
Baschieri & Pellagri 100	<<locked>>	61%	25063	58%	**91	100%
Hodgdon Clays	<<locked>>	60%	27934	64%	**32	100%
Hodgdon HS-6	<<locked>>	61%	31908	73%	**40	99%
Hodgdon Longshot	<<locked>>	61%	35099	81%	**96	100%
Hodgdon Universal	<<locked>>	61%	26643	61%	**76	100%
Hodgdon TrailBoss	<<locked>>	60%	7890	18%	**1	100%
Lovex D036	<<locked>>	61%	38058	87%	**55	99%
[Lovex D037.1]*	<<locked>>	61%	21712	50%	**02	81%
[Lovex D037.2]*	<<locked>>	76%	29167	67%	**47	80%
Lovex S011	<<locked>>	61%	32300	74%	**19	100%
Lovex S020	<<locked>>	62%	26890	62%	**02	100%
Maxam CSB 1	<<locked>>	61%	20610	47%	**48	100%
Maxam CSB 2	<<locked>>	60%	22249	51%	**91	100%
Maxam CSB 3	<<locked>>	61%	23656	54%	**91	100%
Maxam CSB 4	<<locked>>	60%	25222	58%	**91	100%
Maxam CSB 5	<<locked>>	61%	28689	66%	**01	100%
[Ramshot Enforcer]*	<<locked>>	92%	32184	74%	**35	80%
Ramshot Silhouette	<<locked>>	61%	32024	74%	**14	100%
Ramshot True Blue	<<locked>>	61%	36869	85%	**06	100%
ReloadSwiss RS 12	<<locked>>	61%	30284	70%	**99	100%
ReloadSwiss RS 14	<<locked>>	61%	7702	18%	**1	99%
ReloadSwiss RS 20	<<locked>>	61%	20972	48%	**24	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	19406	45%	**30	81%
Rottweil P 801	<<locked>>	61%	33736	78%	**16	100%
Rottweil P 806	<<locked>>	61%	15563	36%	**75	90%
SNPE Vectan A0	<<locked>>	61%	21074	48%	**84	100%
SNPE Vectan BA 9	<<locked>>	61%	24729	57%	**30	100%
SNPE Vectan BA10	<<locked>>	61%	29689	68%	**78	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	17753	41%	**38	93%
SNPE Vectan BA9 1/2	<<locked>>	61%	24700	57%	**37	100%
Shooters World Auto Pistol	<<locked>>	61%	38058	87%	**55	99%
[Shooters World Heavy Pistol]*	<<locked>>	76%	29167	67%	**47	80%
[Shooters World Major Pistol]*	<<locked>>	61%	21712	50%	**02	81%
Somchem MP200	<<locked>>	61%	25585	59%	**02	100%
Somchem MS200	<<locked>>	62%	23728	55%	**50	100%
Somchem S221	<<locked>>	61%	28529	66%	**21	92%
Vihtavuori 3N37	<<locked>>	61%	20566	47%	**30	96%
[Vihtavuori 3N38]*	<<locked>>	68%	17521	40%	**78	80%
[Vihtavuori N105]*	<<locked>>	70%	14808	34%	**38	80%
Vihtavuori N310	<<locked>>	62%	37681	87%	**80	100%
Vihtavuori N320	<<locked>>	61%	26818	62%	**27	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	15954	37%	**8	100%
Vihtavuori N330	<<locked>>	60%	24352	56%	**47	100%
Vihtavuori N340	<<locked>>	61%	22350	51%	**27	100%
Vihtavuori N350	<<locked>>	61%	18782	43%	**88	96%
Winchester 231	<<locked>>	61%	34780	80%	**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.