Load data for .357 Auto Magnum + .357 | 170gr | Speer SP MAG GD

Recommended Powder(s): ADI AP 100

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 170gr \| Speer SP MAG GD
Manufacturer SKU:	4230
Bullet Weight:	170gr \| 11.0g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.680" \| 17.3mm
Caliber:	.357 Auto Magnum load data
Case Length (l3):	1.299" \| 33.0mm
Cartridge Length (C.O.L.):	1.576" \| 40.0mm
Seated Depth:	0.403" \| 10.2mm
Shank Seated Depth:	0.403" \| 10.2mm
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_B6228_C511
Last updated:	2025-01-01

Load data for 66 loads in caliber .357 Auto Magnum with .357 | 170gr | Speer SP MAG GD bullet and 33 powders such as ADI AP 100. 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 (%)
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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>>	78%	33185	90%	**52	100%
ADI APS 450	<<locked>>	63%	32996	89%	**02	100%
[Accurate 4100]*	<<locked>>	80%	32938	89%	**17	86%
Accurate No. 9	<<locked>>	67%	32010	87%	**85	91%
Accurate Solo 1250	<<locked>>	65%	33243	90%	**14	100%
Accurate TCM	<<locked>>	67%	32053	87%	**88	93%
[Alliant 2400]*	<<locked>>	77%	32779	89%	**11	88%
Alliant BLUE DOT	<<locked>>	78%	32285	87%	**81	95%
Alliant POWER PISTOL	<<locked>>	63%	32213	87%	**65	100%
Alliant UNIQUE	<<locked>>	63%	31618	85%	**53	100%
[Hodgdon LilGun]*	<<locked>>	87%	31734	86%	**70	89%
Hodgdon TrailBoss	<<locked>>	96%	20871	56%	**1	100%
Lovex D037.2	<<locked>>	67%	32851	89%	**98	92%
Maxam CSB 1	<<locked>>	66%	31575	85%	**84	100%
Maxam CSB 2	<<locked>>	63%	32474	88%	**88	100%
Maxam CSB 3	<<locked>>	63%	32460	88%	**75	100%
[Ramshot Enforcer]*	<<locked>>	77%	31894	86%	**07	89%
ReloadSwiss RS 14	<<locked>>	96%	19609	53%	**4	100%
ReloadSwiss RS 20	<<locked>>	63%	31444	85%	**47	100%
ReloadSwiss RS 24	<<locked>>	65%	32387	88%	**78	98%
Rottweil P 806	<<locked>>	69%	33156	90%	**75	100%
SNPE Vectan A0	<<locked>>	67%	32996	89%	**47	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	97%	26368	71%	**09	88%
SNPE Vectan BA7 1/2	<<locked>>	70%	31662	86%	**89	100%
Shooters World Heavy Pistol	<<locked>>	67%	32851	89%	**98	92%
Somchem MS200	<<locked>>	63%	32590	88%	**47	100%
Vihtavuori 3N37	<<locked>>	65%	32547	88%	**16	100%
Vihtavuori 3N38	<<locked>>	74%	32605	88%	**68	98%
Vihtavuori N105	<<locked>>	78%	31560	85%	**85	100%
[Vihtavuori N110]*	<<locked>>	96%	32706	88%	**34	89%
Vihtavuori N32C Tin Star	<<locked>>	82%	33214	90%	**09	100%
Vihtavuori N340	<<locked>>	63%	32300	87%	**43	100%
Vihtavuori N350	<<locked>>	67%	31966	86%	**93	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	20001	54%	**15	97%
ADI APS 450	<<locked>>	61%	31053	84%	**79	100%
[Accurate 4100]*	<<locked>>	74%	26237	71%	**93	81%
[Accurate No. 9]*	<<locked>>	61%	25164	68%	**57	87%
Accurate Solo 1250	<<locked>>	61%	29283	79%	**65	100%
[Accurate TCM]*	<<locked>>	61%	25150	68%	**60	88%
[Alliant 2400]*	<<locked>>	64%	21393	58%	**94	80%
[Alliant BLUE DOT]*	<<locked>>	61%	19348	52%	**22	86%
Alliant POWER PISTOL	<<locked>>	61%	30530	83%	**42	100%
Alliant UNIQUE	<<locked>>	61%	29820	81%	**27	100%
[Hodgdon LilGun]*	<<locked>>	78%	22568	61%	**83	81%
Hodgdon TrailBoss	<<locked>>	60%	10138	27%	**5	100%
[Lovex D037.2]*	<<locked>>	61%	25904	70%	**76	87%
Maxam CSB 1	<<locked>>	61%	27963	76%	**35	100%
Maxam CSB 2	<<locked>>	61%	30530	83%	**68	100%
Maxam CSB 3	<<locked>>	61%	30458	82%	**52	100%
[Ramshot Enforcer]*	<<locked>>	65%	20755	56%	**91	81%
ReloadSwiss RS 14	<<locked>>	61%	9689	26%	**8	100%
ReloadSwiss RS 20	<<locked>>	61%	29544	80%	**20	100%
ReloadSwiss RS 24	<<locked>>	61%	27891	75%	**96	96%
Rottweil P 806	<<locked>>	61%	24816	67%	**50	100%
SNPE Vectan A0	<<locked>>	61%	27717	75%	**71	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	85%	19189	52%	**45	81%
SNPE Vectan BA7 1/2	<<locked>>	61%	24062	65%	**61	100%
[Shooters World Heavy Pistol]*	<<locked>>	61%	25904	70%	**76	87%
Somchem MS200	<<locked>>	61%	30676	83%	**20	100%
Vihtavuori 3N37	<<locked>>	61%	29196	79%	**60	100%
Vihtavuori 3N38	<<locked>>	61%	21132	57%	**58	93%
Vihtavuori N105	<<locked>>	61%	17245	47%	**06	93%
[Vihtavuori N110]*	<<locked>>	84%	21901	59%	**40	81%
Vihtavuori N32C Tin Star	<<locked>>	61%	20189	55%	**2	100%
Vihtavuori N340	<<locked>>	61%	30414	82%	**17	100%
Vihtavuori N350	<<locked>>	61%	26716	72%	**20	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.