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

Recommended Powder(s):

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 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.566" \| 39.8mm
Seated Depth:	0.404" \| 10.3mm
Shank Seated Depth:	0.404" \| 10.3mm
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_B6228_C513
Last updated:	2026-01-22

Load data for 126 loads in caliber .357 Magnum with .357 | 170gr | Speer SP MAG GD bullet and 63 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%	38305	88%	**86	100%
ADI AP 70N	<<locked>>	67%	38914	89%	**71	100%
ADI APS 350	<<locked>>	75%	38711	89%	**14	100%
ADI APS 450	<<locked>>	75%	37579	86%	**30	100%
ADI AS 30	<<locked>>	78%	39088	90%	**79	100%
ADI AS 50N	<<locked>>	73%	38087	88%	**12	100%
[Accurate 4100]*	<<locked>>	97%	36695	84%	**09	82%
Accurate No. 2	<<locked>>	74%	38638	89%	**91	100%
Accurate No. 7	<<locked>>	76%	38885	89%	**48	95%
Accurate No. 9	<<locked>>	84%	38798	89%	**32	90%
Accurate Solo 1000	<<locked>>	76%	38957	90%	**02	100%
Accurate Solo 1250	<<locked>>	80%	38276	88%	**48	100%
Accurate TCM	<<locked>>	83%	37739	87%	**16	91%
[Alliant 2400]*	<<locked>>	95%	38522	89%	**55	87%
Alliant BLUE DOT	<<locked>>	96%	37144	85%	**16	93%
Alliant BULLSEYE	<<locked>>	71%	38363	88%	**14	100%
Alliant POWER PISTOL	<<locked>>	79%	38667	89%	**25	100%
Alliant Sport Pistol	<<locked>>	66%	38972	90%	**27	100%
Alliant UNIQUE	<<locked>>	79%	37608	86%	**17	100%
Baschieri & Pellagri 100	<<locked>>	76%	38435	88%	**02	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	94%	37739	87%	**09	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	71%	37681	87%	**15	100%
Hodgdon Clays	<<locked>>	73%	37739	87%	**10	100%
Hodgdon HS-6	<<locked>>	66%	39117	90%	**66	100%
Hodgdon Longshot	<<locked>>	63%	38754	89%	**53	100%
Hodgdon Universal	<<locked>>	74%	38914	89%	**71	100%
Hodgdon CFE Pistol	<<locked>>	75%	37536	86%	**55	100%
Lovex D037.1	<<locked>>	76%	38885	89%	**48	95%
Lovex D037.2	<<locked>>	83%	38798	89%	**32	90%
Lovex S011	<<locked>>	66%	38595	89%	**25	100%
Lovex S020	<<locked>>	72%	37666	87%	**75	100%
Maxam CSB 1	<<locked>>	83%	37565	86%	**38	100%
Maxam CSB 2	<<locked>>	79%	37521	86%	**38	100%
Maxam CSB 3	<<locked>>	79%	39015	90%	**29	100%
Maxam CSB 4	<<locked>>	75%	37594	86%	**96	100%
Maxam CSB 5	<<locked>>	72%	38551	89%	**66	100%
[Ramshot Enforcer]*	<<locked>>	96%	38551	89%	**58	88%
Ramshot Silhouette	<<locked>>	66%	38725	89%	**30	100%
ReloadSwiss RS 12	<<locked>>	68%	37536	86%	**25	100%
ReloadSwiss RS 20	<<locked>>	81%	38392	88%	**11	100%
ReloadSwiss RS 24	<<locked>>	81%	37826	87%	**12	96%
Rottweil P 801	<<locked>>	65%	38435	88%	**09	100%
Rottweil P 806 👍	<<locked>>	86%	38189	88%	**35	100%
SNPE Vectan A0	<<locked>>	83%	38421	88%	**81	100%
SNPE Vectan BA 9	<<locked>>	75%	38348	88%	**55	100%
SNPE Vectan BA10	<<locked>>	70%	37565	86%	**30	100%
SNPE Vectan BA7 1/2	<<locked>>	87%	38072	87%	**40	100%
SNPE Vectan BA9 1/2	<<locked>>	76%	37797	87%	**52	100%
SNPE Vectan SP 2 👍	<<locked>>	74%	38174	88%	**25	100%
Shooters World Heavy Pistol	<<locked>>	83%	38798	89%	**32	90%
Shooters World Major Pistol	<<locked>>	76%	38885	89%	**48	95%
Somchem MP200	<<locked>>	74%	38537	89%	**17	100%
Somchem MS200	<<locked>>	78%	38174	88%	**91	100%
Somchem S221 👍	<<locked>>	69%	38377	88%	**99	99%
Vihtavuori 3N37	<<locked>>	80%	38189	88%	**53	100%
Vihtavuori 3N38	<<locked>>	92%	37608	86%	**06	97%
Vihtavuori N105 👍	<<locked>>	96%	34142	78%	**06	99%
Vihtavuori N320	<<locked>>	72%	37434	86%	**99	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	35288	81%	**17	100%
Vihtavuori N330	<<locked>>	75%	38754	89%	**68	100%
Vihtavuori N340	<<locked>>	79%	38421	88%	**98	100%
Vihtavuori N350	<<locked>>	84%	38247	88%	**53	100%
Winchester 231	<<locked>>	63%	37826	87%	**35	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	15113	35%	**2	89%
ADI AP 70N	<<locked>>	61%	32561	75%	**02	100%
ADI APS 350	<<locked>>	61%	28572	66%	**9	100%
ADI APS 450	<<locked>>	60%	26687	61%	**2	100%
ADI AS 30	<<locked>>	61%	26266	60%	**2	100%
ADI AS 50N	<<locked>>	62%	28660	66%	**10	100%
[Accurate 4100]*	<<locked>>	94%	33011	76%	**70	80%
Accurate No. 2	<<locked>>	61%	25483	59%	**43	100%
[Accurate No. 7]*	<<locked>>	60%	21886	50%	**93	86%
[Accurate No. 9]*	<<locked>>	70%	23308	54%	**06	80%
Accurate Solo 1000	<<locked>>	61%	26411	61%	**8	100%
Accurate Solo 1250	<<locked>>	62%	23366	54%	**1	100%
[Accurate TCM]*	<<locked>>	67%	21770	50%	**76	81%
[Alliant 2400]*	<<locked>>	85%	27949	64%	**01	81%
[Alliant BLUE DOT]*	<<locked>>	71%	18304	42%	**01	81%
Alliant BULLSEYE	<<locked>>	61%	29066	67%	**06	100%
Alliant POWER PISTOL	<<locked>>	62%	22539	52%	**86	94%
Alliant Sport Pistol	<<locked>>	60%	32605	75%	**58	100%
Alliant UNIQUE	<<locked>>	61%	22684	52%	**24	100%
Baschieri & Pellagri 100	<<locked>>	62%	25962	60%	**1	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	61%	16157	37%	**6	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	27789	64%	**14	100%
Hodgdon Clays	<<locked>>	61%	29066	67%	**2	100%
Hodgdon HS-6	<<locked>>	60%	32140	74%	**91	100%
Hodgdon Longshot	<<locked>>	61%	35737	82%	**24	100%
Hodgdon Universal	<<locked>>	61%	26977	62%	**37	100%
Hodgdon CFE Pistol	<<locked>>	61%	25454	58%	**17	100%
[Lovex D037.1]*	<<locked>>	60%	21886	50%	**93	86%
[Lovex D037.2]*	<<locked>>	69%	23308	54%	**06	80%
Lovex S011	<<locked>>	61%	33402	77%	**73	100%
Lovex S020	<<locked>>	61%	26992	62%	**56	100%
Maxam CSB 1	<<locked>>	61%	21103	48%	**2	100%
Maxam CSB 2	<<locked>>	61%	23105	53%	**8	100%
Maxam CSB 3	<<locked>>	60%	24062	55%	**5	100%
Maxam CSB 4	<<locked>>	62%	26701	61%	**1	100%
Maxam CSB 5	<<locked>>	60%	28398	65%	**1	100%
[Ramshot Enforcer]*	<<locked>>	84%	25614	59%	**84	80%
Ramshot Silhouette	<<locked>>	61%	32880	76%	**65	100%
ReloadSwiss RS 12	<<locked>>	62%	31227	72%	**60	100%
ReloadSwiss RS 20	<<locked>>	62%	21785	50%	**14	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	19334	44%	**20	86%
Rottweil P 801	<<locked>>	60%	33765	78%	**60	100%
Rottweil P 806	<<locked>>	61%	15635	36%	**1	95%
SNPE Vectan A0	<<locked>>	61%	21466	49%	**1	100%
SNPE Vectan BA 9	<<locked>>	61%	25817	59%	**17	100%
SNPE Vectan BA10	<<locked>>	60%	29617	68%	**8	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	18014	41%	**8	97%
SNPE Vectan BA9 1/2	<<locked>>	61%	24889	57%	**07	100%
SNPE Vectan SP 2	<<locked>>	61%	24047	55%	**22	97%
[Shooters World Heavy Pistol]*	<<locked>>	69%	23308	54%	**06	80%
[Shooters World Major Pistol]*	<<locked>>	60%	21886	50%	**93	86%
Somchem MP200	<<locked>>	61%	26107	60%	**66	100%
Somchem MS200	<<locked>>	62%	24352	56%	**24	100%
Somchem S221	<<locked>>	61%	29776	68%	**84	96%
Vihtavuori 3N37	<<locked>>	61%	20740	48%	**17	99%
[Vihtavuori 3N38]*	<<locked>>	61%	14620	34%	**2	82%
[Vihtavuori N105]*	<<locked>>	63%	11676	27%	**3	80%
Vihtavuori N320	<<locked>>	61%	27557	63%	**7	100%
Vihtavuori N32C Tin Star	<<locked>>	68%	18956	44%	**0	100%
Vihtavuori N330	<<locked>>	62%	26078	60%	**30	100%
Vihtavuori N340	<<locked>>	61%	22727	52%	**04	100%
Vihtavuori N350	<<locked>>	61%	19392	45%	**8	99%
Winchester 231	<<locked>>	60%	34650	80%	**06	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