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

Recommended Powder(s): Vihtavuori 3N37, Vihtavuori N350

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 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.305" \| 7.7mm
Shank Seated Depth:	0.305" \| 7.7mm
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_B5938_C513
Last updated:	2025-02-02

Load data for 118 loads in caliber .357 Magnum with .355 | 125gr | Sierra FMJ RN SportsMaster bullet and 59 powders such as 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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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%	35201	81%	**96	97%
ADI AP 70N	<<locked>>	69%	38812	89%	**30	100%
ADI APS 350	<<locked>>	76%	38159	88%	**37	100%
ADI APS 450	<<locked>>	78%	39059	90%	**83	100%
ADI AS 30	<<locked>>	79%	38580	89%	**19	100%
ADI AS 50N	<<locked>>	73%	36796	85%	**52	100%
Accurate No. 2	<<locked>>	74%	36724	84%	**34	100%
Accurate No. 7	<<locked>>	77%	36811	85%	**72	90%
[Accurate No. 9]*	<<locked>>	86%	37768	87%	**68	84%
Accurate Solo 1000	<<locked>>	77%	37681	87%	**45	100%
Accurate Solo 1250	<<locked>>	83%	38058	87%	**07	100%
[Accurate TCM]*	<<locked>>	87%	38653	89%	**78	86%
[Alliant BLUE DOT]*	<<locked>>	95%	33127	76%	**03	87%
Alliant BULLSEYE	<<locked>>	72%	37057	85%	**70	100%
Alliant POWER PISTOL	<<locked>>	82%	38450	88%	**91	98%
Alliant UNIQUE	<<locked>>	84%	39117	90%	**03	100%
Baschieri & Pellagri 100	<<locked>>	79%	39088	90%	**65	100%
Hodgdon Clays	<<locked>>	76%	38928	89%	**60	100%
Hodgdon HS-6	<<locked>>	67%	37434	86%	**09	100%
Hodgdon Longshot	<<locked>>	65%	38769	89%	**29	100%
Hodgdon Universal	<<locked>>	75%	37536	86%	**17	100%
Hodgdon TrailBoss	<<locked>>	94%	15055	35%	**1	100%
Lovex D037.1	<<locked>>	77%	36811	85%	**72	90%
[Lovex D037.2]*	<<locked>>	85%	37768	87%	**68	84%
Lovex S011	<<locked>>	66%	36593	84%	**62	100%
Lovex S020	<<locked>>	75%	38377	88%	**47	100%
Maxam CSB 1	<<locked>>	86%	38566	89%	**11	100%
Maxam CSB 2	<<locked>>	83%	38696	89%	**14	100%
Maxam CSB 3	<<locked>>	81%	38174	88%	**81	100%
Maxam CSB 4	<<locked>>	77%	37608	86%	**52	100%
Maxam CSB 5	<<locked>>	72%	36651	84%	**89	100%
Ramshot Silhouette	<<locked>>	67%	37333	86%	**76	100%
Ramshot True Blue	<<locked>>	63%	37695	87%	**09	100%
ReloadSwiss RS 12	<<locked>>	70%	36535	84%	**65	100%
ReloadSwiss RS 14	<<locked>>	95%	13996	32%	**8	100%
ReloadSwiss RS 20	<<locked>>	83%	37623	86%	**76	100%
ReloadSwiss RS 24	<<locked>>	84%	37739	87%	**75	93%
Rottweil P 801	<<locked>>	66%	37782	87%	**52	100%
Rottweil P 806	<<locked>>	89%	38740	89%	**14	100%
SNPE Vectan A0	<<locked>>	84%	36941	85%	**30	100%
SNPE Vectan BA 9	<<locked>>	77%	37144	85%	**01	100%
SNPE Vectan BA10	<<locked>>	71%	37463	86%	**63	100%
SNPE Vectan BA7 1/2	<<locked>>	89%	36738	84%	**80	100%
SNPE Vectan BA9 1/2	<<locked>>	78%	37304	86%	**04	100%
[Shooters World Heavy Pistol]*	<<locked>>	85%	37768	87%	**68	84%
Shooters World Major Pistol	<<locked>>	77%	36811	85%	**72	90%
Somchem MP200	<<locked>>	76%	37971	87%	**83	100%
Somchem MS200	<<locked>>	81%	38754	89%	**63	100%
Somchem S221	<<locked>>	71%	38769	89%	**62	96%
Vihtavuori 3N37 👍	<<locked>>	83%	38014	87%	**29	100%
Vihtavuori 3N38	<<locked>>	95%	37188	85%	**58	94%
Vihtavuori N105	<<locked>>	96%	30632	70%	**19	95%
Vihtavuori N310	<<locked>>	64%	38856	89%	**83	100%
Vihtavuori N320	<<locked>>	76%	38914	89%	**68	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	33185	76%	**27	100%
Vihtavuori N330	<<locked>>	76%	36521	84%	**04	100%
Vihtavuori N340	<<locked>>	80%	37188	85%	**47	100%
Vihtavuori N350 👍	<<locked>>	87%	38653	89%	**29	100%
Winchester 231	<<locked>>	64%	36564	84%	**85	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	13793	32%	**30	82%
ADI AP 70N	<<locked>>	61%	31212	72%	**29	100%
ADI APS 350	<<locked>>	60%	26789	62%	**89	100%
ADI APS 450	<<locked>>	61%	25730	59%	**09	100%
ADI AS 30	<<locked>>	61%	25179	58%	**42	100%
ADI AS 50N	<<locked>>	61%	26469	61%	**07	100%
Accurate No. 2	<<locked>>	60%	23540	54%	**34	100%
[Accurate No. 7]*	<<locked>>	63%	22249	51%	**99	81%
[Accurate No. 9]*	<<locked>>	81%	31357	72%	**73	81%
Accurate Solo 1000	<<locked>>	60%	24758	57%	**68	100%
Accurate Solo 1250	<<locked>>	61%	21176	49%	**61	100%
[Accurate TCM]*	<<locked>>	78%	28485	65%	**07	80%
[Alliant BLUE DOT]*	<<locked>>	83%	24366	56%	**35	81%
Alliant BULLSEYE	<<locked>>	60%	26934	62%	**19	100%
[Alliant POWER PISTOL]*	<<locked>>	61%	20421	47%	**47	88%
Alliant UNIQUE	<<locked>>	61%	21277	49%	**14	100%
Baschieri & Pellagri 100	<<locked>>	61%	23728	55%	**58	100%
Hodgdon Clays	<<locked>>	60%	27282	63%	**09	100%
Hodgdon HS-6	<<locked>>	61%	30734	71%	**07	99%
Hodgdon Longshot	<<locked>>	61%	33895	78%	**53	100%
Hodgdon Universal	<<locked>>	61%	25483	59%	**47	100%
Hodgdon TrailBoss	<<locked>>	61%	7803	18%	**5	100%
[Lovex D037.1]*	<<locked>>	63%	22249	51%	**99	81%
[Lovex D037.2]*	<<locked>>	80%	31357	72%	**73	81%
Lovex S011	<<locked>>	60%	30966	71%	**93	100%
Lovex S020	<<locked>>	62%	25657	59%	**70	100%
Maxam CSB 1	<<locked>>	61%	20204	46%	**38	100%
Maxam CSB 2	<<locked>>	61%	21799	50%	**78	100%
Maxam CSB 3	<<locked>>	61%	23308	54%	**71	100%
Maxam CSB 4	<<locked>>	61%	24656	57%	**78	100%
Maxam CSB 5	<<locked>>	62%	28326	65%	**81	100%
Ramshot Silhouette	<<locked>>	61%	30400	70%	**81	100%
Ramshot True Blue	<<locked>>	61%	35549	82%	**76	100%
ReloadSwiss RS 12	<<locked>>	61%	28703	66%	**73	100%
ReloadSwiss RS 14	<<locked>>	62%	7556	17%	**8	99%
ReloadSwiss RS 20	<<locked>>	61%	19740	45%	**94	100%
[ReloadSwiss RS 24]*	<<locked>>	63%	19595	45%	**20	81%
Rottweil P 801	<<locked>>	61%	32445	75%	**89	100%
[Rottweil P 806]*	<<locked>>	61%	14692	34%	**42	89%
SNPE Vectan A0	<<locked>>	61%	20160	46%	**55	100%
SNPE Vectan BA 9	<<locked>>	60%	23815	55%	**07	100%
SNPE Vectan BA10	<<locked>>	62%	29414	68%	**65	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	17100	39%	**09	92%
SNPE Vectan BA9 1/2	<<locked>>	60%	23380	54%	**04	100%
[Shooters World Heavy Pistol]*	<<locked>>	80%	31357	72%	**73	81%
[Shooters World Major Pistol]*	<<locked>>	63%	22249	51%	**99	81%
Somchem MP200	<<locked>>	61%	24511	56%	**73	100%
Somchem MS200	<<locked>>	61%	22756	52%	**20	100%
Somchem S221	<<locked>>	61%	26731	61%	**68	91%
Vihtavuori 3N37	<<locked>>	62%	19769	45%	**01	96%
[Vihtavuori 3N38]*	<<locked>>	70%	17738	41%	**75	80%
[Vihtavuori N105]*	<<locked>>	75%	16012	37%	**71	81%
Vihtavuori N310	<<locked>>	61%	35752	82%	**43	100%
Vihtavuori N320	<<locked>>	60%	25164	58%	**91	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	15374	35%	**1	100%
Vihtavuori N330	<<locked>>	61%	24091	55%	**34	100%
Vihtavuori N340	<<locked>>	60%	21103	49%	**94	100%
Vihtavuori N350	<<locked>>	61%	17956	41%	**55	95%
Winchester 231	<<locked>>	62%	33765	78%	**42	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