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

Recommended Powder(s): Alliant UNIQUE, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200, Vihtavuori N340

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 SIG load data
Case Length (l3):	0.860" \| 21.8mm
Cartridge Length (C.O.L.):	1.123" \| 28.5mm
Seated Depth:	0.269" \| 6.8mm
Shank Seated Depth:	0.269" \| 6.8mm
Case Capacity:	19.5 Grains of Water \| 1.27 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B5945_C518
Last updated:	2025-01-01

Load data for 114 loads in caliber .357 SIG with .357 | 125gr | Sierra JSP FN bullet and 57 powders such as Alliant UNIQUE, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200, Vihtavuori N340. 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>>	95%	26440	60%	**76	91%
ADI AP 70N	<<locked>>	78%	38667	87%	**71	100%
ADI AS 30	<<locked>>	87%	37826	85%	**43	100%
ADI AS 50N	<<locked>>	84%	38290	87%	**06	100%
Accurate No. 2	<<locked>>	83%	37768	85%	**65	100%
Accurate No. 5	<<locked>>	70%	38566	87%	**76	98%
[Accurate No. 7]*	<<locked>>	88%	37956	86%	**12	87%
Accurate Solo 1000	<<locked>>	86%	37884	86%	**80	100%
Accurate Solo 1250	<<locked>>	93%	38348	87%	**52	100%
Alliant BULLSEYE	<<locked>>	81%	38203	86%	**17	100%
Alliant POWER PISTOL	<<locked>>	93%	38377	87%	**26	96%
Alliant UNIQUE 👍	<<locked>>	94%	38566	87%	**37	100%
Baschieri & Pellagri 100	<<locked>>	88%	39030	88%	**93	100%
Hodgdon Clays	<<locked>>	83%	39247	89%	**84	100%
Hodgdon HP38	<<locked>>	66%	39668	90%	**45	100%
Hodgdon HS-6	<<locked>>	76%	38305	87%	**50	99%
Hodgdon Longshot	<<locked>>	73%	39088	88%	**60	100%
Hodgdon Universal	<<locked>>	86%	38667	87%	**71	100%
Hodgdon TrailBoss	<<locked>>	94%	11835	27%	**0	100%
Lovex D036	<<locked>>	70%	38493	87%	**73	97%
[Lovex D037.1]*	<<locked>>	88%	37956	86%	**12	87%
Lovex S011	<<locked>>	76%	39276	89%	**25	100%
Lovex S020	<<locked>>	85%	39726	90%	**98	100%
Maxam CSB 1	<<locked>>	96%	37898	86%	**35	100%
Maxam CSB 2	<<locked>>	93%	38043	86%	**52	100%
Maxam CSB 3	<<locked>>	92%	39175	89%	**25	100%
Maxam CSB 4	<<locked>>	86%	37811	85%	**93	100%
Maxam CSB 5	<<locked>>	82%	38885	88%	**47	100%
Ramshot Silhouette	<<locked>>	77%	39102	88%	**34	100%
Ramshot True Blue	<<locked>>	71%	38232	86%	**37	99%
Ramshot Zip	<<locked>>	66%	38305	87%	**35	100%
ReloadSwiss RS 12	<<locked>>	81%	37942	86%	**35	100%
ReloadSwiss RS 14	<<locked>>	96%	11037	25%	**6	100%
ReloadSwiss RS 20 👍	<<locked>>	96%	39160	89%	**37	100%
ReloadSwiss RS 24	<<locked>>	96%	38493	87%	**09	90%
Rottweil P 801	<<locked>>	75%	38305	87%	**02	100%
Rottweil P 806	<<locked>>	96%	30690	69%	**67	98%
SNPE Vectan A0 👍	<<locked>>	97%	38986	88%	**81	100%
SNPE Vectan BA 9	<<locked>>	87%	39378	89%	**58	100%
SNPE Vectan BA10	<<locked>>	80%	39523	89%	**14	100%
SNPE Vectan BA7 1/2	<<locked>>	97%	34505	78%	**81	99%
SNPE Vectan BA9 1/2	<<locked>>	88%	37942	86%	**48	100%
Shooters World Auto Pistol	<<locked>>	70%	38493	87%	**73	97%
[Shooters World Major Pistol]*	<<locked>>	88%	37956	86%	**12	87%
Somchem MP200	<<locked>>	86%	38551	87%	**21	100%
Somchem MS200 👍	<<locked>>	91%	38609	87%	**91	100%
Somchem S221	<<locked>>	81%	39160	89%	**90	93%
Vihtavuori 3N37	<<locked>>	94%	38130	86%	**57	100%
[Vihtavuori 3N38]*	<<locked>>	97%	28181	64%	**39	85%
[Vihtavuori N105]*	<<locked>>	96%	20726	47%	**40	83%
Vihtavuori N310	<<locked>>	70%	38754	88%	**11	100%
Vihtavuori N320	<<locked>>	85%	39218	89%	**12	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	26411	60%	**93	100%
Vihtavuori N330	<<locked>>	87%	37956	86%	**68	100%
Vihtavuori N340 👍	<<locked>>	91%	38696	87%	**01	100%
Vihtavuori N350	<<locked>>	96%	36622	83%	**34	100%
Winchester 231	<<locked>>	73%	38305	87%	**35	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	73%	14881	34%	**17	80%
ADI AP 70N	<<locked>>	61%	24250	55%	**81	100%
ADI AS 30	<<locked>>	61%	20900	47%	**20	100%
ADI AS 50N	<<locked>>	61%	21930	50%	**79	100%
Accurate No. 2	<<locked>>	62%	19290	44%	**83	96%
Accurate No. 5	<<locked>>	61%	28369	64%	**12	94%
[Accurate No. 7]*	<<locked>>	78%	26687	60%	**35	80%
Accurate Solo 1000	<<locked>>	62%	21190	48%	**53	100%
Accurate Solo 1250	<<locked>>	62%	17158	39%	**27	100%
Alliant BULLSEYE	<<locked>>	62%	22481	51%	**75	100%
[Alliant POWER PISTOL]*	<<locked>>	63%	16650	38%	**93	81%
Alliant UNIQUE	<<locked>>	61%	16723	38%	**60	97%
Baschieri & Pellagri 100	<<locked>>	62%	19450	44%	**33	100%
Hodgdon Clays	<<locked>>	61%	23743	54%	**7	100%
Hodgdon HP38	<<locked>>	61%	34243	77%	**83	100%
Hodgdon HS-6	<<locked>>	61%	23380	53%	**11	93%
Hodgdon Longshot	<<locked>>	62%	26252	59%	**66	96%
Hodgdon Universal	<<locked>>	62%	20349	46%	**09	100%
Hodgdon TrailBoss	<<locked>>	63%	6498	15%	**3	99%
Lovex D036	<<locked>>	61%	28326	64%	**12	94%
[Lovex D037.1]*	<<locked>>	78%	26687	60%	**35	80%
Lovex S011	<<locked>>	60%	25092	57%	**42	100%
Lovex S020	<<locked>>	61%	18898	43%	**93	99%
Maxam CSB 1	<<locked>>	60%	15374	35%	**4	100%
Maxam CSB 2	<<locked>>	61%	16114	36%	**30	100%
Maxam CSB 3	<<locked>>	62%	18797	42%	**43	100%
Maxam CSB 4	<<locked>>	61%	19972	45%	**43	100%
Maxam CSB 5	<<locked>>	61%	22597	51%	**47	100%
Ramshot Silhouette	<<locked>>	61%	23090	52%	**94	98%
Ramshot True Blue	<<locked>>	61%	26890	61%	**73	97%
Ramshot Zip	<<locked>>	61%	33011	75%	**76	100%
ReloadSwiss RS 12	<<locked>>	61%	21756	49%	**25	100%
ReloadSwiss RS 14	<<locked>>	65%	6411	15%	**9	95%
ReloadSwiss RS 20	<<locked>>	61%	14634	33%	**27	97%
[ReloadSwiss RS 24]*	<<locked>>	78%	22771	51%	**40	80%
Rottweil P 801	<<locked>>	60%	25135	57%	**35	100%
[Rottweil P 806]*	<<locked>>	66%	11168	25%	**04	80%
SNPE Vectan A0	<<locked>>	62%	16288	37%	**07	96%
SNPE Vectan BA 9	<<locked>>	61%	19319	44%	**70	100%
SNPE Vectan BA10	<<locked>>	61%	25237	57%	**43	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	61%	13213	30%	**1	85%
SNPE Vectan BA9 1/2	<<locked>>	61%	18855	43%	**66	100%
Shooters World Auto Pistol	<<locked>>	61%	28326	64%	**12	94%
[Shooters World Major Pistol]*	<<locked>>	78%	26687	60%	**35	80%
Somchem MP200	<<locked>>	61%	19174	43%	**06	97%
Somchem MS200	<<locked>>	61%	17564	40%	**56	98%
[Somchem S221]*	<<locked>>	61%	19943	45%	**58	82%
[Vihtavuori 3N37]*	<<locked>>	61%	14852	34%	**27	88%
[Vihtavuori 3N38]*	<<locked>>	89%	22510	51%	**30	81%
[Vihtavuori N105]*	<<locked>>	93%	18913	43%	**94	81%
Vihtavuori N310	<<locked>>	61%	30066	68%	**19	100%
Vihtavuori N320	<<locked>>	61%	19812	45%	**60	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	11705	26%	**7	100%
Vihtavuori N330	<<locked>>	61%	17637	40%	**73	100%
Vihtavuori N340	<<locked>>	62%	16969	38%	**50	97%
[Vihtavuori N350]*	<<locked>>	62%	13561	31%	**4	87%
Winchester 231	<<locked>>	61%	26614	60%	**88	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