Load data for .357 Auto Magnum + .357 | 125gr | Speer JSP

Recommended Powder(s): Rottweil P 806

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Speer JSP
Manufacturer SKU:	4011
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.515" \| 13.1mm
Caliber:	.357 Auto Magnum load data
Case Length (l3):	1.299" \| 33.0mm
Cartridge Length (C.O.L.):	1.576" \| 40.0mm
Seated Depth:	0.238" \| 6.0mm
Shank Seated Depth:	0.238" \| 6.0mm
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_B6217_C511
Last updated:	2025-01-01

Load data for 72 loads in caliber .357 Auto Magnum with .357 | 125gr | Speer JSP bullet and 36 powders such as Rottweil P 806. 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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Min z (%)
Min FR (%)
Max FR*
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Barrel Length (cm)
Safety Buffer (%)
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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>>	79%	32227	87%	**94	99%
ADI APS 450	<<locked>>	63%	31836	86%	**16	100%
ADI AS 30	<<locked>>	64%	32372	88%	**65	100%
[Accurate No. 9]*	<<locked>>	70%	32140	87%	**21	86%
Accurate Solo 1000	<<locked>>	64%	32851	89%	**07	100%
Accurate Solo 1250	<<locked>>	67%	32605	88%	**57	100%
[Accurate TCM]*	<<locked>>	70%	32532	88%	**27	88%
[Alliant 2400]*	<<locked>>	79%	32663	88%	**57	83%
Alliant BLUE DOT	<<locked>>	81%	32634	88%	**37	91%
Alliant POWER PISTOL	<<locked>>	66%	32663	88%	**37	98%
Alliant UNIQUE	<<locked>>	66%	32982	89%	**42	100%
Baschieri & Pellagri 100	<<locked>>	63%	31720	86%	**88	100%
[Hodgdon LilGun]*	<<locked>>	91%	33069	89%	**32	84%
Hodgdon TrailBoss	<<locked>>	96%	20059	54%	**45	100%
[Lovex D037.2]*	<<locked>>	70%	32851	89%	**34	87%
Maxam CSB 1	<<locked>>	69%	32518	88%	**57	100%
Maxam CSB 2	<<locked>>	65%	32068	87%	**34	100%
Maxam CSB 3	<<locked>>	65%	32590	88%	**34	100%
Maxam CSB 4	<<locked>>	63%	32808	89%	**11	100%
[Ramshot Enforcer]*	<<locked>>	79%	31995	87%	**47	84%
ReloadSwiss RS 14	<<locked>>	94%	18202	49%	**42	100%
ReloadSwiss RS 20	<<locked>>	66%	32111	87%	**12	100%
ReloadSwiss RS 24	<<locked>>	68%	32358	87%	**21	94%
Rottweil P 806 👍	<<locked>>	70%	32561	88%	**34	100%
SNPE Vectan A0	<<locked>>	68%	32126	87%	**93	100%
SNPE Vectan BA 9	<<locked>>	62%	32227	87%	**53	100%
SNPE Vectan BA7 1/2	<<locked>>	73%	32808	89%	**52	100%
SNPE Vectan BA9 1/2	<<locked>>	63%	31952	86%	**53	100%
[Shooters World Heavy Pistol]*	<<locked>>	70%	32851	89%	**34	87%
Somchem MS200	<<locked>>	65%	32242	87%	**96	100%
Vihtavuori 3N37	<<locked>>	67%	33141	90%	**85	100%
Vihtavuori 3N38	<<locked>>	77%	32140	87%	**14	95%
Vihtavuori N105	<<locked>>	82%	32010	87%	**54	98%
Vihtavuori N32C Tin Star	<<locked>>	82%	31821	86%	**25	100%
Vihtavuori N340	<<locked>>	64%	31807	86%	**99	100%
Vihtavuori N350	<<locked>>	69%	31966	86%	**52	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	19087	52%	**86	92%
ADI APS 450	<<locked>>	61%	30211	82%	**89	100%
ADI AS 30	<<locked>>	62%	30661	83%	**39	100%
[Accurate No. 9]*	<<locked>>	62%	24308	66%	**50	80%
Accurate Solo 1000	<<locked>>	61%	31227	84%	**81	100%
Accurate Solo 1250	<<locked>>	61%	27688	75%	**78	100%
[Accurate TCM]*	<<locked>>	61%	23656	64%	**30	81%
[Alliant 2400]*	<<locked>>	75%	29051	79%	**75	81%
[Alliant BLUE DOT]*	<<locked>>	64%	19725	53%	**22	81%
Alliant POWER PISTOL	<<locked>>	61%	28456	77%	**49	97%
Alliant UNIQUE	<<locked>>	61%	28398	77%	**57	100%
Baschieri & Pellagri 100	<<locked>>	61%	30168	82%	**71	100%
[Hodgdon LilGun]*	<<locked>>	88%	29428	80%	**50	81%
Hodgdon TrailBoss	<<locked>>	62%	10283	28%	**6	100%
[Lovex D037.2]*	<<locked>>	62%	24918	67%	**63	81%
Maxam CSB 1	<<locked>>	61%	26353	71%	**52	100%
Maxam CSB 2	<<locked>>	61%	28950	78%	**88	100%
Maxam CSB 3	<<locked>>	61%	29356	79%	**75	100%
Maxam CSB 4	<<locked>>	61%	31169	84%	**91	100%
[Ramshot Enforcer]*	<<locked>>	75%	27238	74%	**35	80%
ReloadSwiss RS 14	<<locked>>	61%	9427	25%	**3	100%
ReloadSwiss RS 20	<<locked>>	61%	27427	74%	**34	100%
ReloadSwiss RS 24	<<locked>>	61%	26121	71%	**93	91%
Rottweil P 806	<<locked>>	61%	23409	63%	**37	98%
SNPE Vectan A0	<<locked>>	61%	26382	71%	**88	100%
SNPE Vectan BA 9	<<locked>>	61%	30719	83%	**30	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	22655	61%	**55	99%
SNPE Vectan BA9 1/2	<<locked>>	61%	30371	82%	**37	100%
[Shooters World Heavy Pistol]*	<<locked>>	62%	24918	67%	**63	81%
Somchem MS200	<<locked>>	61%	29182	79%	**50	100%
Vihtavuori 3N37	<<locked>>	61%	27427	74%	**73	100%
[Vihtavuori 3N38]*	<<locked>>	61%	19537	53%	**25	86%
[Vihtavuori N105]*	<<locked>>	61%	15838	43%	**60	86%
Vihtavuori N32C Tin Star	<<locked>>	61%	19711	53%	**15	100%
Vihtavuori N340	<<locked>>	61%	28529	77%	**37	100%
Vihtavuori N350	<<locked>>	61%	25005	68%	**17	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.