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

Recommended Powder(s):

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:	2026-01-21

Load data for 128 loads in caliber .357 Magnum with .357 | 125gr | Sierra JSP FN bullet and 64 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>>	96%	37289	86%	**52	98%
ADI AP 70N	<<locked>>	68%	38421	88%	**47	100%
ADI APS 350	<<locked>>	75%	38174	88%	**53	100%
ADI APS 450	<<locked>>	77%	38609	89%	**93	100%
ADI AS 30	<<locked>>	78%	38508	88%	**39	100%
ADI AS 50N	<<locked>>	74%	38058	87%	**81	100%
Accurate No. 2	<<locked>>	75%	39030	90%	**76	100%
Accurate No. 7	<<locked>>	76%	38638	89%	**21	92%
[Accurate No. 9]*	<<locked>>	85%	38754	89%	**01	86%
Accurate Solo 1000	<<locked>>	77%	38885	89%	**75	100%
Accurate Solo 1250	<<locked>>	82%	39044	90%	**27	100%
[Accurate TCM]*	<<locked>>	85%	38305	88%	**91	87%
[Alliant 2400]*	<<locked>>	97%	39001	90%	**34	83%
Alliant BLUE DOT	<<locked>>	97%	36564	84%	**75	90%
Alliant BULLSEYE	<<locked>>	71%	38029	87%	**93	100%
Alliant POWER PISTOL	<<locked>>	80%	38290	88%	**11	98%
Alliant Sport Pistol	<<locked>>	66%	37971	87%	**03	100%
Alliant UNIQUE	<<locked>>	81%	38682	89%	**06	100%
Baschieri & Pellagri 100	<<locked>>	78%	38522	89%	**65	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	97%	38885	89%	**81	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	72%	38203	88%	**85	100%
Hodgdon Clays	<<locked>>	75%	38783	89%	**70	100%
Hodgdon HS-6	<<locked>>	66%	38319	88%	**42	100%
Hodgdon Longshot	<<locked>>	64%	38493	88%	**32	100%
Hodgdon Universal	<<locked>>	75%	38421	88%	**47	100%
Hodgdon CFE Pistol	<<locked>>	77%	38276	88%	**40	100%
Hodgdon TrailBoss	<<locked>>	96%	16273	37%	**4	100%
Lovex D037.1	<<locked>>	76%	38638	89%	**21	92%
[Lovex D037.2]*	<<locked>>	84%	38754	89%	**01	86%
Lovex S011	<<locked>>	67%	39059	90%	**04	100%
Lovex S020	<<locked>>	73%	37739	87%	**50	100%
Maxam CSB 1	<<locked>>	84%	38000	87%	**21	100%
Maxam CSB 2	<<locked>>	80%	38319	88%	**17	100%
Maxam CSB 3	<<locked>>	79%	37681	87%	**91	100%
Maxam CSB 4	<<locked>>	77%	38783	89%	**78	100%
Maxam CSB 5	<<locked>>	72%	38058	87%	**22	100%
[Ramshot Enforcer]*	<<locked>>	97%	38203	88%	**21	83%
Ramshot Silhouette	<<locked>>	67%	38899	89%	**09	100%
ReloadSwiss RS 12	<<locked>>	71%	39117	90%	**11	100%
ReloadSwiss RS 14	<<locked>>	97%	15185	35%	**04	100%
ReloadSwiss RS 20	<<locked>>	82%	38232	88%	**96	100%
ReloadSwiss RS 24	<<locked>>	83%	38508	88%	**01	94%
Rottweil P 801	<<locked>>	66%	38682	89%	**71	100%
Rottweil P 806	<<locked>>	87%	38769	89%	**21	100%
SNPE Vectan A0	<<locked>>	85%	38798	89%	**60	100%
SNPE Vectan BA 9	<<locked>>	77%	38798	89%	**37	100%
SNPE Vectan BA10	<<locked>>	72%	38595	89%	**93	100%
SNPE Vectan BA7 1/2	<<locked>>	89%	38667	89%	**26	100%
SNPE Vectan BA9 1/2	<<locked>>	77%	38174	88%	**30	100%
SNPE Vectan SP 2	<<locked>>	76%	38725	89%	**11	99%
[Shooters World Heavy Pistol]*	<<locked>>	84%	38754	89%	**01	86%
Shooters World Major Pistol	<<locked>>	76%	38638	89%	**21	92%
Somchem MP200	<<locked>>	75%	38566	89%	**03	100%
Somchem MS200	<<locked>>	80%	39146	90%	**86	100%
Somchem S221	<<locked>>	70%	38174	88%	**78	96%
Vihtavuori 3N37 👍	<<locked>>	82%	38247	88%	**39	100%
Vihtavuori 3N38	<<locked>>	94%	38885	89%	**94	95%
Vihtavuori N105	<<locked>>	96%	32837	75%	**55	96%
Vihtavuori N320	<<locked>>	75%	38624	89%	**81	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	35186	81%	**63	100%
Vihtavuori N330	<<locked>>	75%	37608	86%	**30	100%
Vihtavuori N340	<<locked>>	79%	37797	87%	**70	100%
Vihtavuori N350 👍	<<locked>>	85%	38696	89%	**39	100%
Winchester 231	<<locked>>	65%	38522	89%	**21	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 APS 350	<<locked>>	60%	27383	63%	**12	100%
ADI APS 450	<<locked>>	60%	26237	60%	**25	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. 7]*	<<locked>>	61%	21712	50%	**02	81%
[Accurate No. 9]*	<<locked>>	77%	29167	67%	**47	80%
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 2400]*	<<locked>>	93%	34838	80%	**65	80%
[Alliant BLUE DOT]*	<<locked>>	80%	23032	53%	**19	81%
Alliant BULLSEYE	<<locked>>	61%	28326	65%	**48	100%
Alliant POWER PISTOL	<<locked>>	61%	21176	49%	**73	90%
Alliant Sport Pistol	<<locked>>	62%	32982	76%	**34	100%
Alliant UNIQUE	<<locked>>	61%	22510	52%	**47	100%
Baschieri & Pellagri 100	<<locked>>	61%	25063	58%	**91	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	61%	15969	37%	**37	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	27325	63%	**43	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 CFE Pistol	<<locked>>	61%	24366	56%	**34	100%
Hodgdon TrailBoss	<<locked>>	86%	13561	31%	**2	100%
[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%
ReloadSwiss RS 12	<<locked>>	61%	30284	70%	**99	100%
ReloadSwiss RS 14	<<locked>>	87%	12633	29%	**5	100%
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%
SNPE Vectan SP 2	<<locked>>	61%	23409	54%	**42	93%
[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 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.

<<locked>>... you need to buy an access license to unlock the data