Load data for .357 Auto Magnum + .357 | 125gr | Sierra JHC SportsMaster

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Sierra JHC SportsMaster
Manufacturer SKU:	8320
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.534" \| 13.6mm
Caliber:	.357 Auto Magnum load data
Case Length (l3):	1.299" \| 33.0mm
Cartridge Length (C.O.L.):	1.576" \| 40.0mm
Seated Depth:	0.257" \| 6.5mm
Shank Seated Depth:	0.257" \| 6.5mm
Case Capacity:	35.0 Grains of Water \| 2.27 cm³
Primer Size:	Small Pistol Magnum (SPM)
Max. allowed Pressure:	36985 psi \| 2550 bar
LID:	LID_B5944_C511
Last updated:	2025-01-01

Load data for 66 loads in caliber .357 Auto Magnum with .357 | 125gr | Sierra JHC SportsMaster bullet and 33 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>>	78%	32401	88%	**85	99%
ADI APS 450	<<locked>>	63%	32460	88%	**22	100%
[Accurate No. 9]*	<<locked>>	69%	32576	88%	**14	86%
Accurate Solo 1250	<<locked>>	65%	32111	87%	**37	100%
[Accurate TCM]*	<<locked>>	69%	33156	90%	**24	88%
[Alliant 2400]*	<<locked>>	77%	32619	88%	**44	83%
Alliant BLUE DOT	<<locked>>	79%	32082	87%	**04	91%
Alliant POWER PISTOL	<<locked>>	64%	32271	87%	**11	98%
Alliant UNIQUE	<<locked>>	65%	32909	89%	**26	100%
Baschieri & Pellagri 100	<<locked>>	63%	32982	89%	**94	100%
[Hodgdon LilGun]*	<<locked>>	89%	32909	89%	**16	83%
Hodgdon TrailBoss	<<locked>>	96%	21422	58%	**61	100%
[Lovex D037.2]*	<<locked>>	67%	32053	87%	**08	86%
Maxam CSB 1	<<locked>>	67%	32285	87%	**40	100%
Maxam CSB 2	<<locked>>	63%	32140	87%	**24	100%
Maxam CSB 3	<<locked>>	63%	32169	87%	**11	100%
[Ramshot Enforcer]*	<<locked>>	78%	32793	89%	**54	85%
ReloadSwiss RS 14	<<locked>>	96%	20320	55%	**71	100%
ReloadSwiss RS 20	<<locked>>	65%	32169	87%	**03	100%
ReloadSwiss RS 24	<<locked>>	66%	32329	87%	**14	94%
Rottweil P 806	<<locked>>	68%	32779	89%	**14	100%
SNPE Vectan A0	<<locked>>	67%	31807	86%	**67	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	97%	25744	70%	**93	82%
SNPE Vectan BA7 1/2	<<locked>>	72%	32909	89%	**55	100%
[Shooters World Heavy Pistol]*	<<locked>>	67%	32053	87%	**08	86%
Somchem MS200	<<locked>>	63%	32068	87%	**80	100%
Vihtavuori 3N37	<<locked>>	65%	32518	88%	**55	100%
Vihtavuori 3N38	<<locked>>	76%	32822	89%	**17	95%
Vihtavuori N105	<<locked>>	80%	32314	87%	**54	98%
[Vihtavuori N110]*	<<locked>>	97%	32140	87%	**60	83%
Vihtavuori N32C Tin Star	<<locked>>	80%	31966	86%	**09	100%
Vihtavuori N340	<<locked>>	65%	33170	90%	**99	100%
Vihtavuori N350	<<locked>>	68%	32198	87%	**55	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	20523	55%	**22	94%
ADI APS 450	<<locked>>	61%	30806	83%	**96	100%
[Accurate No. 9]*	<<locked>>	61%	25077	68%	**63	81%
Accurate Solo 1250	<<locked>>	61%	28877	78%	**85	100%
[Accurate TCM]*	<<locked>>	61%	25092	68%	**60	83%
[Alliant 2400]*	<<locked>>	72%	28224	76%	**42	80%
[Alliant BLUE DOT]*	<<locked>>	61%	19856	54%	**12	81%
Alliant POWER PISTOL	<<locked>>	61%	29385	79%	**52	97%
Alliant UNIQUE	<<locked>>	61%	29994	81%	**73	100%
Baschieri & Pellagri 100	<<locked>>	61%	31198	84%	**75	100%
[Hodgdon LilGun]*	<<locked>>	86%	29443	80%	**37	80%
Hodgdon TrailBoss	<<locked>>	61%	11516	31%	**6	100%
[Lovex D037.2]*	<<locked>>	61%	25367	69%	**70	81%
Maxam CSB 1	<<locked>>	61%	27615	75%	**62	100%
Maxam CSB 2	<<locked>>	61%	30545	83%	**01	100%
Maxam CSB 3	<<locked>>	61%	30284	82%	**78	100%
[Ramshot Enforcer]*	<<locked>>	72%	27122	73%	**22	80%
ReloadSwiss RS 14	<<locked>>	62%	11269	30%	**9	100%
ReloadSwiss RS 20	<<locked>>	61%	28979	78%	**53	100%
ReloadSwiss RS 24	<<locked>>	61%	27296	74%	**06	91%
Rottweil P 806	<<locked>>	61%	25918	70%	**76	99%
SNPE Vectan A0	<<locked>>	61%	27543	74%	**98	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	94%	23989	65%	**53	80%
SNPE Vectan BA7 1/2	<<locked>>	61%	24192	65%	**81	99%
[Shooters World Heavy Pistol]*	<<locked>>	61%	25367	69%	**70	81%
Somchem MS200	<<locked>>	61%	30414	82%	**60	100%
Vihtavuori 3N37	<<locked>>	61%	28485	77%	**86	100%
[Vihtavuori 3N38]*	<<locked>>	61%	21350	58%	**65	88%
[Vihtavuori N105]*	<<locked>>	61%	17463	47%	**99	88%
[Vihtavuori N110]*	<<locked>>	93%	28442	77%	**72	80%
Vihtavuori N32C Tin Star	<<locked>>	61%	21219	57%	**32	100%
Vihtavuori N340	<<locked>>	61%	30037	81%	**53	100%
Vihtavuori N350	<<locked>>	61%	26440	72%	**44	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