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

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:	.355 \| 125gr \| Sierra JHP SportsMaster
Manufacturer SKU:	8125
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.355" \| 9.02mm
Bullet Length:	0.542" \| 13.8mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.266" \| 6.8mm
Shank Seated Depth:	0.266" \| 6.8mm
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_B5939_C513
Last updated:	2025-02-02

Load data for 120 loads in caliber .357 Magnum with .355 | 125gr | Sierra JHP SportsMaster 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".

Go to the bottom of the "My Account " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.
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>>	95%	35592	82%	**16	98%
ADI AP 70N	<<locked>>	71%	41582	96%	**76	100%
ADI AS 30	<<locked>>	82%	41684	96%	**68	100%
ADI AS 50N	<<locked>>	79%	42685	98%	**30	100%
Accurate No. 2	<<locked>>	77%	41234	95%	**96	100%
Accurate No. 5	<<locked>>	64%	42395	97%	**21	100%
Accurate No. 7	<<locked>>	79%	41452	95%	**57	93%
[Accurate No. 9]*	<<locked>>	87%	41814	96%	**37	87%
Accurate Solo 1000	<<locked>>	80%	40814	94%	**91	100%
Accurate Solo 1250	<<locked>>	84%	40857	94%	**53	100%
[Accurate TCM]*	<<locked>>	88%	42917	99%	**47	89%
Alliant BULLSEYE	<<locked>>	75%	41423	95%	**42	100%
Alliant POWER PISTOL	<<locked>>	83%	41481	95%	**50	99%
Alliant UNIQUE	<<locked>>	86%	43004	99%	**62	100%
Baschieri & Pellagri 100	<<locked>>	81%	42090	97%	**01	100%
Hodgdon Clays	<<locked>>	79%	42409	97%	**12	100%
Hodgdon HS-6	<<locked>>	70%	42598	98%	**91	100%
Hodgdon Longshot	<<locked>>	66%	41481	95%	**78	100%
Hodgdon Universal	<<locked>>	80%	43062	99%	**96	100%
Hodgdon TrailBoss	<<locked>>	97%	16418	38%	**4	100%
Lovex D036	<<locked>>	64%	42351	97%	**21	100%
Lovex D037.1	<<locked>>	79%	41452	95%	**57	93%
[Lovex D037.2]*	<<locked>>	87%	43192	99%	**57	87%
Lovex S011	<<locked>>	69%	40915	94%	**21	100%
Lovex S020	<<locked>>	76%	41118	94%	**90	100%
Maxam CSB 1	<<locked>>	88%	41060	94%	**50	100%
Maxam CSB 2	<<locked>>	84%	41510	95%	**57	100%
Maxam CSB 3	<<locked>>	83%	40915	94%	**27	100%
Maxam CSB 4	<<locked>>	80%	40582	93%	**04	100%
Maxam CSB 5	<<locked>>	78%	42772	98%	**68	100%
[Ramshot Enforcer]*	<<locked>>	96%	36927	85%	**14	83%
Ramshot Silhouette	<<locked>>	71%	43337	100%	**68	100%
Ramshot True Blue	<<locked>>	66%	43381	100%	**81	100%
ReloadSwiss RS 12	<<locked>>	74%	42482	98%	**50	100%
ReloadSwiss RS 14	<<locked>>	93%	13924	32%	**1	100%
ReloadSwiss RS 20	<<locked>>	87%	43091	99%	**45	100%
ReloadSwiss RS 24	<<locked>>	87%	42453	98%	**63	95%
Rottweil P 801	<<locked>>	71%	43366	100%	**21	100%
Rottweil P 806 👍	<<locked>>	91%	42989	99%	**80	100%
SNPE Vectan A0	<<locked>>	88%	42032	97%	**03	100%
SNPE Vectan BA 9	<<locked>>	81%	43323	100%	**80	100%
SNPE Vectan BA10	<<locked>>	77%	43453	100%	**42	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	93%	41814	96%	**58	100%
SNPE Vectan BA9 1/2	<<locked>>	81%	41437	95%	**67	100%
Shooters World Auto Pistol	<<locked>>	64%	42351	97%	**21	100%
[Shooters World Heavy Pistol]*	<<locked>>	87%	43192	99%	**57	87%
Shooters World Major Pistol	<<locked>>	79%	41452	95%	**57	93%
Somchem MP200	<<locked>>	78%	41568	96%	**39	100%
Somchem MS200	<<locked>>	82%	41104	94%	**03	100%
Somchem S221	<<locked>>	73%	42380	97%	**34	98%
Vihtavuori 3N37 👍	<<locked>>	86%	42612	98%	**88	100%
Vihtavuori 3N38	<<locked>>	95%	39566	91%	**98	95%
Vihtavuori N105	<<locked>>	95%	31125	72%	**29	95%
Vihtavuori N310	<<locked>>	67%	42598	98%	**32	100%
Vihtavuori N320	<<locked>>	77%	40683	94%	**01	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	34316	79%	**53	100%
Vihtavuori N330	<<locked>>	80%	42453	98%	**86	100%
Vihtavuori N340	<<locked>>	83%	41220	95%	**06	100%
Vihtavuori N350 👍	<<locked>>	87%	40814	94%	**58	100%
Winchester 231	<<locked>>	68%	41756	96%	**53	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	14750	34%	**73	84%
ADI AP 70N	<<locked>>	61%	31459	72%	**52	100%
ADI AS 30	<<locked>>	62%	25991	60%	**68	100%
ADI AS 50N	<<locked>>	61%	27151	62%	**27	100%
Accurate No. 2	<<locked>>	61%	25179	58%	**70	100%
Accurate No. 5	<<locked>>	61%	37579	86%	**52	99%
[Accurate No. 7]*	<<locked>>	61%	21176	49%	**93	80%
[Accurate No. 9]*	<<locked>>	77%	29530	68%	**47	80%
Accurate Solo 1000	<<locked>>	61%	25498	59%	**88	100%
Accurate Solo 1250	<<locked>>	61%	21756	50%	**78	100%
[Accurate TCM]*	<<locked>>	74%	26803	62%	**94	80%
Alliant BULLSEYE	<<locked>>	61%	28660	66%	**58	100%
Alliant POWER PISTOL	<<locked>>	61%	21480	49%	**86	90%
Alliant UNIQUE	<<locked>>	62%	22669	52%	**57	100%
Baschieri & Pellagri 100	<<locked>>	61%	24308	56%	**75	100%
Hodgdon Clays	<<locked>>	61%	28137	65%	**32	100%
Hodgdon HS-6	<<locked>>	61%	31256	72%	**30	99%
Hodgdon Longshot	<<locked>>	61%	34592	79%	**76	100%
Hodgdon Universal	<<locked>>	60%	25875	59%	**60	100%
Hodgdon TrailBoss	<<locked>>	60%	7948	18%	**1	100%
Lovex D036	<<locked>>	61%	37521	86%	**52	99%
[Lovex D037.1]*	<<locked>>	61%	21176	49%	**93	80%
[Lovex D037.2]*	<<locked>>	77%	30327	70%	**63	81%
Lovex S011	<<locked>>	61%	32721	75%	**25	100%
Lovex S020	<<locked>>	61%	25991	60%	**86	100%
Maxam CSB 1	<<locked>>	61%	20871	48%	**58	100%
Maxam CSB 2	<<locked>>	61%	22394	51%	**91	100%
Maxam CSB 3	<<locked>>	61%	24076	55%	**91	100%
Maxam CSB 4	<<locked>>	61%	25396	58%	**98	100%
Maxam CSB 5	<<locked>>	62%	29124	67%	**01	100%
[Ramshot Enforcer]*	<<locked>>	92%	32677	75%	**39	80%
Ramshot Silhouette	<<locked>>	61%	31357	72%	**07	100%
Ramshot True Blue	<<locked>>	61%	36172	83%	**99	100%
ReloadSwiss RS 12	<<locked>>	61%	29472	68%	**83	100%
ReloadSwiss RS 14	<<locked>>	62%	7716	18%	**1	99%
ReloadSwiss RS 20	<<locked>>	61%	20233	47%	**14	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	18971	44%	**17	81%
Rottweil P 801	<<locked>>	60%	32822	75%	**02	100%
Rottweil P 806	<<locked>>	61%	15171	35%	**61	90%
SNPE Vectan A0	<<locked>>	61%	20523	47%	**75	100%
SNPE Vectan BA 9	<<locked>>	61%	25150	58%	**40	100%
SNPE Vectan BA10	<<locked>>	62%	29979	69%	**81	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	17898	41%	**38	93%
SNPE Vectan BA9 1/2	<<locked>>	61%	24889	57%	**43	100%
Shooters World Auto Pistol	<<locked>>	61%	37521	86%	**52	99%
[Shooters World Heavy Pistol]*	<<locked>>	77%	30327	70%	**63	81%
[Shooters World Major Pistol]*	<<locked>>	61%	21176	49%	**93	80%
Somchem MP200	<<locked>>	61%	25788	59%	**02	100%
Somchem MS200	<<locked>>	61%	23090	53%	**34	100%
Somchem S221	<<locked>>	61%	28268	65%	**04	92%
Vihtavuori 3N37	<<locked>>	61%	20102	46%	**17	96%
[Vihtavuori 3N38]*	<<locked>>	69%	18289	42%	**94	81%
[Vihtavuori N105]*	<<locked>>	72%	15432	35%	**68	81%
Vihtavuori N310	<<locked>>	61%	36492	84%	**63	100%
Vihtavuori N320	<<locked>>	62%	27166	62%	**27	100%
Vihtavuori N32C Tin Star	<<locked>>	60%	15447	35%	**8	100%
Vihtavuori N330	<<locked>>	61%	24671	57%	**47	100%
Vihtavuori N340	<<locked>>	61%	22510	52%	**27	100%
Vihtavuori N350	<<locked>>	61%	18304	42%	**71	95%
Winchester 231	<<locked>>	61%	34011	78%	**55	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.