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

Recommended Powder(s):

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:	2026-01-22

Load data for 132 loads in caliber .357 Magnum with .355 | 125gr | Sierra JHP SportsMaster bullet and 66 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%	36651	84%	**32	98%
ADI AP 70N	<<locked>>	68%	38827	89%	**47	100%
ADI APS 350	<<locked>>	76%	38638	89%	**53	100%
ADI APS 450	<<locked>>	78%	39131	90%	**99	100%
ADI AS 30	<<locked>>	79%	38725	89%	**35	100%
ADI AS 50N	<<locked>>	74%	38595	89%	**81	100%
Accurate No. 2	<<locked>>	75%	38014	87%	**63	100%
Accurate No. 7	<<locked>>	77%	39030	90%	**21	92%
[Accurate No. 9]*	<<locked>>	85%	38348	88%	**88	85%
Accurate Solo 1000	<<locked>>	76%	37884	87%	**55	100%
Accurate Solo 1250	<<locked>>	81%	38174	88%	**17	100%
[Accurate TCM]*	<<locked>>	86%	39088	90%	**94	87%
[Alliant 2400]*	<<locked>>	97%	38595	89%	**21	82%
[Alliant BLUE DOT]*	<<locked>>	97%	36027	83%	**58	89%
Alliant BULLSEYE	<<locked>>	72%	38638	89%	**03	100%
Alliant POWER PISTOL	<<locked>>	81%	38783	89%	**11	98%
Alliant Sport Pistol	<<locked>>	67%	38363	88%	**03	100%
Alliant UNIQUE	<<locked>>	82%	38972	90%	**16	100%
Baschieri & Pellagri 100	<<locked>>	78%	39015	90%	**75	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	96%	38290	88%	**78	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	73%	38479	88%	**85	100%
Hodgdon Clays	<<locked>>	74%	37956	87%	**57	100%
Hodgdon HS-6	<<locked>>	67%	39131	90%	**45	100%
Hodgdon Longshot	<<locked>>	64%	39015	90%	**45	100%
Hodgdon Universal	<<locked>>	76%	38827	89%	**47	100%
Hodgdon CFE Pistol	<<locked>>	78%	38638	89%	**37	100%
Hodgdon TrailBoss	<<locked>>	97%	16418	38%	**4	100%
Lovex D037.1	<<locked>>	77%	39030	90%	**21	92%
[Lovex D037.2]*	<<locked>>	84%	38348	88%	**88	85%
Lovex S011	<<locked>>	66%	38058	87%	**94	100%
Lovex S020	<<locked>>	74%	38435	88%	**63	100%
Maxam CSB 1	<<locked>>	85%	38348	88%	**17	100%
Maxam CSB 2	<<locked>>	81%	38783	89%	**27	100%
Maxam CSB 3	<<locked>>	80%	38072	88%	**91	100%
Maxam CSB 4	<<locked>>	77%	37942	87%	**68	100%
Maxam CSB 5	<<locked>>	73%	38377	88%	**19	100%
[Ramshot Enforcer]*	<<locked>>	97%	37869	87%	**27	83%
Ramshot Silhouette	<<locked>>	67%	38261	88%	**06	100%
Ramshot True Blue	<<locked>>	63%	38508	89%	**22	100%
ReloadSwiss RS 12	<<locked>>	70%	38363	88%	**98	100%
ReloadSwiss RS 14	<<locked>>	95%	14634	34%	**8	100%
ReloadSwiss RS 20	<<locked>>	83%	38711	89%	**93	100%
ReloadSwiss RS 24	<<locked>>	84%	38885	89%	**14	94%
Rottweil P 801	<<locked>>	65%	38029	87%	**62	100%
Rottweil P 806	<<locked>>	87%	38232	88%	**08	100%
SNPE Vectan A0	<<locked>>	84%	37927	87%	**53	100%
SNPE Vectan BA 9	<<locked>>	76%	38174	88%	**21	100%
SNPE Vectan BA10	<<locked>>	73%	39117	90%	**99	100%
SNPE Vectan BA7 1/2	<<locked>>	89%	38406	88%	**16	100%
SNPE Vectan BA9 1/2	<<locked>>	78%	38609	89%	**30	100%
SNPE Vectan SP 2	<<locked>>	76%	37956	87%	**04	99%
[Shooters World Heavy Pistol]*	<<locked>>	84%	38348	88%	**88	85%
Shooters World Major Pistol	<<locked>>	77%	39030	90%	**21	92%
Somchem MP200	<<locked>>	76%	39015	90%	**03	100%
Somchem MS200	<<locked>>	80%	38377	88%	**67	100%
Somchem S221	<<locked>>	70%	38798	89%	**81	97%
Vihtavuori 3N37 👍	<<locked>>	82%	38885	89%	**52	100%
Vihtavuori 3N38	<<locked>>	94%	38537	89%	**81	94%
Vihtavuori N105	<<locked>>	96%	32169	74%	**49	96%
Vihtavuori N310	<<locked>>	62%	38043	87%	**86	100%
Vihtavuori N320	<<locked>>	74%	37855	87%	**71	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	34316	79%	**53	100%
Vihtavuori N330	<<locked>>	76%	38130	88%	**30	100%
Vihtavuori N340	<<locked>>	80%	38348	88%	**70	100%
Vihtavuori N350 👍	<<locked>>	85%	38130	88%	**35	100%
Winchester 231	<<locked>>	65%	39059	90%	**17	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 APS 350	<<locked>>	61%	27833	64%	**15	100%
ADI APS 450	<<locked>>	61%	26469	61%	**32	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. 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 2400]*	<<locked>>	94%	35549	82%	**72	81%
[Alliant BLUE DOT]*	<<locked>>	80%	23438	54%	**25	81%
Alliant BULLSEYE	<<locked>>	61%	28660	66%	**58	100%
Alliant POWER PISTOL	<<locked>>	61%	21480	49%	**86	90%
Alliant Sport Pistol	<<locked>>	61%	32198	74%	**11	100%
Alliant UNIQUE	<<locked>>	62%	22669	52%	**57	100%
Baschieri & Pellagri 100	<<locked>>	61%	24308	56%	**75	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	62%	16114	37%	**37	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	26760	61%	**34	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 CFE Pistol	<<locked>>	61%	24627	57%	**34	100%
Hodgdon TrailBoss	<<locked>>	86%	13590	31%	**2	100%
[Lovex D037.1]*	<<locked>>	61%	21176	49%	**93	80%
[Lovex D037.2]*	<<locked>>	77%	29530	68%	**47	80%
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>>	85%	12198	28%	**2	100%
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%
SNPE Vectan SP 2	<<locked>>	61%	23772	55%	**45	94%
[Shooters World Heavy Pistol]*	<<locked>>	77%	29530	68%	**47	80%
[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>>	68%	17695	41%	**81	80%
[Vihtavuori N105]*	<<locked>>	71%	14982	34%	**42	80%
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.

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