Load data for .357 SIG + .355 | 125gr | Sierra FMJ RN SportsMaster

Recommended Powder(s): Alliant UNIQUE, Ramshot True Blue, ReloadSwiss RS 20, Somchem MS200, Vihtavuori N340

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.355 \| 125gr \| Sierra FMJ RN SportsMaster
Manufacturer SKU:	8120
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.355" \| 9.02mm
Bullet Length:	0.581" \| 14.8mm
Caliber:	.357 SIG load data
Case Length (l3):	0.860" \| 21.8mm
Cartridge Length (C.O.L.):	1.123" \| 28.5mm
Seated Depth:	0.318" \| 8.1mm
Shank Seated Depth:	0.318" \| 8.1mm
Case Capacity:	19.5 Grains of Water \| 1.27 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B5938_C518
Last updated:	2025-01-01

Load data for 116 loads in caliber .357 SIG with .355 | 125gr | Sierra FMJ RN SportsMaster bullet and 58 powders such as Alliant UNIQUE, Ramshot True Blue, ReloadSwiss RS 20, 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>>	97%	25251	57%	**34	89%
ADI AP 70N	<<locked>>	81%	39668	90%	**58	100%
ADI APS 350	<<locked>>	85%	38914	88%	**45	100%
ADI APS 450	<<locked>>	86%	38174	86%	**78	100%
ADI AS 30	<<locked>>	90%	38450	87%	**30	100%
ADI AS 50N	<<locked>>	87%	39349	89%	**86	100%
Accurate No. 2	<<locked>>	87%	39711	90%	**55	100%
Accurate No. 5	<<locked>>	73%	39552	89%	**47	97%
[Accurate No. 7]*	<<locked>>	91%	38943	88%	**83	86%
Accurate Solo 1000	<<locked>>	89%	38667	87%	**60	100%
Accurate Solo 1250	<<locked>>	95%	37811	85%	**16	100%
Alliant BULLSEYE	<<locked>>	85%	39436	89%	**07	100%
Alliant POWER PISTOL	<<locked>>	97%	39392	89%	**96	95%
Alliant UNIQUE 👍	<<locked>>	97%	38232	86%	**01	100%
Baschieri & Pellagri 100	<<locked>>	90%	38305	87%	**63	100%
Hodgdon Clays	<<locked>>	85%	39581	89%	**65	100%
Hodgdon HP38	<<locked>>	68%	38899	88%	**09	100%
Hodgdon HS-6	<<locked>>	79%	39378	89%	**30	98%
Hodgdon Longshot	<<locked>>	75%	38580	87%	**17	99%
Hodgdon TiteGroup	<<locked>>	62%	38943	88%	**53	100%
Hodgdon Universal	<<locked>>	90%	39668	90%	**58	100%
Hodgdon TrailBoss	<<locked>>	95%	11240	25%	**0	100%
Lovex D036	<<locked>>	73%	39494	89%	**53	97%
[Lovex D037.1]*	<<locked>>	91%	38943	88%	**83	86%
Lovex S011	<<locked>>	77%	38551	87%	**86	100%
Lovex S020	<<locked>>	87%	39247	89%	**62	100%
Maxam CSB 1	<<locked>>	95%	35273	80%	**80	100%
Maxam CSB 2	<<locked>>	95%	36898	83%	**19	100%
Maxam CSB 3	<<locked>>	93%	38319	87%	**93	100%
Maxam CSB 4	<<locked>>	90%	38537	87%	**73	100%
Maxam CSB 5	<<locked>>	85%	39247	89%	**30	100%
Ramshot Silhouette	<<locked>>	80%	39378	89%	**07	100%
Ramshot True Blue 👍	<<locked>>	74%	38972	88%	**17	99%
Ramshot Zip	<<locked>>	69%	39668	90%	**22	100%
ReloadSwiss RS 12	<<locked>>	84%	39001	88%	**22	100%
ReloadSwiss RS 14	<<locked>>	93%	9805	22%	**1	99%
ReloadSwiss RS 20 👍	<<locked>>	95%	35331	80%	**71	100%
[ReloadSwiss RS 24]*	<<locked>>	97%	36695	83%	**40	87%
Rottweil P 801	<<locked>>	79%	39160	89%	**86	100%
Rottweil P 806	<<locked>>	96%	26585	60%	**71	95%
SNPE Vectan A0	<<locked>>	95%	35346	80%	**12	100%
SNPE Vectan BA 9	<<locked>>	90%	39392	89%	**25	100%
SNPE Vectan BA10	<<locked>>	80%	38145	86%	**78	100%
SNPE Vectan BA7 1/2	<<locked>>	97%	32140	73%	**16	97%
SNPE Vectan BA9 1/2	<<locked>>	92%	39146	88%	**42	100%
Shooters World Auto Pistol	<<locked>>	73%	39494	89%	**53	97%
[Shooters World Major Pistol]*	<<locked>>	91%	38943	88%	**83	86%
Somchem MP200	<<locked>>	89%	38508	87%	**88	100%
Somchem MS200 👍	<<locked>>	93%	38130	86%	**62	100%
Somchem S221	<<locked>>	83%	39131	88%	**53	92%
Vihtavuori 3N37	<<locked>>	96%	36869	83%	**11	99%
Vihtavuori N310	<<locked>>	72%	38696	87%	**88	100%
Vihtavuori N320	<<locked>>	89%	39668	90%	**96	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	24787	56%	**60	100%
Vihtavuori N330	<<locked>>	91%	39566	89%	**55	100%
Vihtavuori N340 👍	<<locked>>	94%	38406	87%	**65	100%
Vihtavuori N350	<<locked>>	95%	33272	75%	**58	99%
Winchester 231	<<locked>>	77%	39668	90%	**22	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	78%	15925	36%	**24	80%
ADI AP 70N	<<locked>>	61%	22611	51%	**32	100%
ADI APS 350	<<locked>>	61%	22539	51%	**1	100%
ADI APS 450	<<locked>>	61%	21437	48%	**8	100%
ADI AS 30	<<locked>>	62%	20073	45%	**8	100%
ADI AS 50N	<<locked>>	62%	21306	48%	**53	100%
Accurate No. 2	<<locked>>	61%	17999	41%	**30	95%
Accurate No. 5	<<locked>>	60%	25425	57%	**37	91%
[Accurate No. 7]*	<<locked>>	83%	29124	66%	**48	81%
Accurate Solo 1000	<<locked>>	60%	19145	43%	**7	100%
Accurate Solo 1250	<<locked>>	61%	15447	35%	**4	99%
Alliant BULLSEYE	<<locked>>	61%	20755	47%	**22	99%
[Alliant POWER PISTOL]*	<<locked>>	66%	16708	38%	**76	80%
Alliant UNIQUE	<<locked>>	61%	15316	35%	**04	95%
Baschieri & Pellagri 100	<<locked>>	61%	17753	40%	**4	100%
Hodgdon Clays	<<locked>>	61%	22713	51%	**5	100%
Hodgdon HP38	<<locked>>	61%	31401	71%	**27	100%
Hodgdon HS-6	<<locked>>	62%	21973	50%	**58	91%
Hodgdon Longshot	<<locked>>	61%	23424	53%	**88	94%
Hodgdon TiteGroup	<<locked>>	60%	36912	83%	**34	100%
Hodgdon Universal	<<locked>>	61%	18681	42%	**53	100%
Hodgdon TrailBoss	<<locked>>	69%	6889	16%	**3	99%
Lovex D036	<<locked>>	60%	25382	57%	**37	91%
[Lovex D037.1]*	<<locked>>	83%	29124	66%	**48	81%
Lovex S011	<<locked>>	62%	25048	57%	**22	100%
Lovex S020	<<locked>>	60%	17477	40%	**43	98%
Maxam CSB 1	<<locked>>	61%	14910	34%	**5	99%
Maxam CSB 2	<<locked>>	62%	15345	35%	**7	100%
Maxam CSB 3	<<locked>>	60%	16969	38%	**8	100%
Maxam CSB 4	<<locked>>	62%	19102	43%	**10	100%
Maxam CSB 5	<<locked>>	61%	21799	49%	**14	100%
Ramshot Silhouette	<<locked>>	62%	22452	51%	**61	98%
Ramshot True Blue	<<locked>>	61%	25266	57%	**20	95%
Ramshot Zip	<<locked>>	60%	30211	68%	**17	100%
ReloadSwiss RS 12	<<locked>>	61%	19972	45%	**76	100%
ReloadSwiss RS 14	<<locked>>	72%	6802	15%	**9	95%
ReloadSwiss RS 20	<<locked>>	60%	13387	30%	**4	96%
[ReloadSwiss RS 24]*	<<locked>>	82%	23989	54%	**37	80%
Rottweil P 801	<<locked>>	62%	24700	56%	**15	100%
[Rottweil P 806]*	<<locked>>	71%	11850	27%	**14	80%
SNPE Vectan A0	<<locked>>	61%	15113	34%	**8	94%
SNPE Vectan BA 9	<<locked>>	61%	18028	41%	**17	99%
SNPE Vectan BA10	<<locked>>	62%	24787	56%	**17	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	61%	12459	28%	**6	82%
SNPE Vectan BA9 1/2	<<locked>>	60%	17405	39%	**17	100%
Shooters World Auto Pistol	<<locked>>	60%	25382	57%	**37	91%
[Shooters World Major Pistol]*	<<locked>>	83%	29124	66%	**48	81%
Somchem MP200	<<locked>>	61%	18043	41%	**63	96%
Somchem MS200	<<locked>>	62%	17231	39%	**27	97%
[Somchem S221]*	<<locked>>	62%	19711	45%	**25	80%
[Vihtavuori 3N37]*	<<locked>>	60%	13024	29%	**8	85%
Vihtavuori N310	<<locked>>	60%	27456	62%	**63	100%
Vihtavuori N320	<<locked>>	62%	19305	44%	**33	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	11008	25%	**0	100%
Vihtavuori N330	<<locked>>	60%	15998	36%	**17	100%
Vihtavuori N340	<<locked>>	61%	15592	35%	**7	96%
[Vihtavuori N350]*	<<locked>>	62%	12575	28%	**8	84%
Winchester 231	<<locked>>	61%	25353	57%	**48	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