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

Recommended Powder(s): ADI AP 100, ReloadSwiss RS 24

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 Maximum load data
Case Length (l3):	1.600" \| 40.6mm
Cartridge Length (C.O.L.):	1.960" \| 49.8mm
Seated Depth:	0.320" \| 8.1mm
Shank Seated Depth:	0.320" \| 8.1mm
Case Capacity:	33.6 Grains of Water \| 2.18 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B6228_C515
Last updated:	2025-01-01

Load data for 110 loads in caliber .357 Maximum with .357 | 170gr | Speer SP MAG GD bullet and 55 powders such as ADI AP 100, ReloadSwiss RS 24. 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.

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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>>	84%	40001	89%	**01	100%
ADI APS 350	<<locked>>	69%	38696	86%	**25	100%
ADI APS 450	<<locked>>	72%	40451	90%	**68	100%
ADI AS 30	<<locked>>	69%	38435	85%	**71	100%
ADI AS 50N	<<locked>>	65%	39537	88%	**24	100%
[Accurate 4100]*	<<locked>>	84%	39871	89%	**70	89%
Accurate No. 2	<<locked>>	65%	39755	88%	**09	100%
Accurate No. 7	<<locked>>	64%	40422	90%	**76	98%
Accurate No. 9	<<locked>>	71%	38870	86%	**47	94%
Accurate Solo 1000	<<locked>>	69%	39784	88%	**11	100%
Accurate Solo 1250	<<locked>>	70%	39073	87%	**50	100%
Accurate TCM	<<locked>>	71%	38972	87%	**53	95%
Alliant 2400	<<locked>>	80%	39059	87%	**67	91%
Alliant BLUE DOT	<<locked>>	84%	40118	89%	**63	98%
Alliant POWER PISTOL	<<locked>>	68%	39189	87%	**34	100%
Alliant UNIQUE	<<locked>>	69%	39160	87%	**22	100%
Baschieri & Pellagri 100	<<locked>>	68%	39450	88%	**11	100%
Hodgdon Clays	<<locked>>	69%	39610	88%	**38	100%
[Hodgdon H110]*	<<locked>>	89%	39668	88%	**90	85%
Hodgdon LilGun	<<locked>>	90%	39334	87%	**26	92%
Hodgdon Universal	<<locked>>	65%	39972	89%	**76	100%
Hodgdon TrailBoss	<<locked>>	95%	21321	47%	**8	100%
Lovex D037.1	<<locked>>	64%	40422	90%	**76	98%
Lovex D037.2	<<locked>>	71%	39827	89%	**60	94%
Lovex S020	<<locked>>	63%	39320	87%	**80	100%
Maxam CSB 1	<<locked>>	74%	40016	89%	**57	100%
Maxam CSB 2	<<locked>>	70%	40364	90%	**53	100%
Maxam CSB 3	<<locked>>	71%	40219	89%	**40	100%
Maxam CSB 4	<<locked>>	68%	40016	89%	**17	100%
Maxam CSB 5	<<locked>>	64%	38377	85%	**61	100%
Ramshot Enforcer	<<locked>>	80%	38957	87%	**70	92%
ReloadSwiss RS 14	<<locked>>	95%	20102	45%	**8	100%
ReloadSwiss RS 20	<<locked>>	70%	40030	89%	**16	100%
ReloadSwiss RS 24 👍	<<locked>>	69%	38986	87%	**47	99%
Rottweil P 806	<<locked>>	72%	38667	86%	**01	100%
SNPE Vectan A0	<<locked>>	74%	40292	90%	**99	100%
SNPE Vectan BA 9	<<locked>>	66%	38972	87%	**53	100%
SNPE Vectan BA10	<<locked>>	66%	39320	87%	**55	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	96%	27528	61%	**89	89%
SNPE Vectan BA7 1/2	<<locked>>	77%	40030	89%	**52	100%
SNPE Vectan BA9 1/2	<<locked>>	67%	39146	87%	**60	100%
Shooters World Heavy Pistol	<<locked>>	71%	39827	89%	**60	94%
Shooters World Major Pistol	<<locked>>	64%	40422	90%	**76	98%
Somchem MP200	<<locked>>	64%	39305	87%	**19	100%
Somchem MS200	<<locked>>	69%	40045	89%	**02	100%
[Somchem S265]*	<<locked>>	96%	38174	85%	**17	83%
Vihtavuori 3N37	<<locked>>	70%	39711	88%	**65	100%
Vihtavuori 3N38	<<locked>>	79%	39247	87%	**34	100%
Vihtavuori N105	<<locked>>	83%	38986	87%	**50	100%
Vihtavuori N110	<<locked>>	97%	35969	80%	**50	91%
Vihtavuori N320	<<locked>>	64%	38218	85%	**98	100%
Vihtavuori N32C Tin Star	<<locked>>	89%	39247	87%	**48	100%
Vihtavuori N330	<<locked>>	65%	39740	88%	**63	100%
Vihtavuori N340	<<locked>>	69%	40074	89%	**02	100%
Vihtavuori N350	<<locked>>	72%	39146	87%	**58	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	21147	47%	**09	97%
ADI APS 350	<<locked>>	60%	32227	72%	**43	100%
ADI APS 450	<<locked>>	62%	32329	72%	**73	100%
ADI AS 30	<<locked>>	61%	32140	71%	**02	100%
ADI AS 50N	<<locked>>	61%	35244	78%	**75	100%
[Accurate 4100]*	<<locked>>	72%	26716	59%	**70	81%
Accurate No. 2	<<locked>>	61%	35027	78%	**57	100%
Accurate No. 7	<<locked>>	61%	35172	78%	**98	97%
[Accurate No. 9]*	<<locked>>	61%	26963	60%	**60	88%
Accurate Solo 1000	<<locked>>	62%	33330	74%	**45	100%
Accurate Solo 1250	<<locked>>	61%	30748	68%	**55	100%
[Accurate TCM]*	<<locked>>	61%	26963	60%	**53	89%
[Alliant 2400]*	<<locked>>	64%	22321	50%	**71	80%
[Alliant BLUE DOT]*	<<locked>>	61%	20320	45%	**12	87%
Alliant POWER PISTOL	<<locked>>	61%	31923	71%	**25	100%
Alliant UNIQUE	<<locked>>	61%	31314	70%	**20	100%
Baschieri & Pellagri 100	<<locked>>	61%	33069	74%	**42	100%
Hodgdon Clays	<<locked>>	60%	32837	73%	**63	100%
[Hodgdon H110]*	<<locked>>	83%	32039	71%	**81	81%
[Hodgdon LilGun]*	<<locked>>	76%	23235	52%	**60	81%
Hodgdon Universal	<<locked>>	61%	35737	79%	**20	100%
Hodgdon TrailBoss	<<locked>>	60%	10544	23%	**2	100%
Lovex D037.1	<<locked>>	61%	35172	78%	**98	97%
[Lovex D037.2]*	<<locked>>	61%	27717	62%	**80	89%
Lovex S020	<<locked>>	61%	37057	82%	**60	100%
Maxam CSB 1	<<locked>>	61%	28355	63%	**15	100%
Maxam CSB 2	<<locked>>	61%	32082	71%	**58	100%
Maxam CSB 3	<<locked>>	61%	31937	71%	**42	100%
Maxam CSB 4	<<locked>>	62%	33692	75%	**48	100%
Maxam CSB 5	<<locked>>	62%	36172	80%	**42	100%
[Ramshot Enforcer]*	<<locked>>	64%	21292	47%	**61	81%
ReloadSwiss RS 14	<<locked>>	61%	10095	22%	**8	100%
ReloadSwiss RS 20	<<locked>>	61%	30182	67%	**98	100%
ReloadSwiss RS 24	<<locked>>	61%	29080	65%	**86	96%
Rottweil P 806	<<locked>>	61%	26789	60%	**43	100%
SNPE Vectan A0	<<locked>>	61%	29022	65%	**61	100%
SNPE Vectan BA 9	<<locked>>	61%	33214	74%	**91	100%
SNPE Vectan BA10	<<locked>>	61%	35244	78%	**06	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	83%	19131	43%	**15	81%
SNPE Vectan BA7 1/2	<<locked>>	61%	25237	56%	**55	100%
SNPE Vectan BA9 1/2	<<locked>>	61%	33170	74%	**94	100%
[Shooters World Heavy Pistol]*	<<locked>>	61%	27717	62%	**80	89%
Shooters World Major Pistol	<<locked>>	61%	35172	78%	**98	97%
Somchem MP200	<<locked>>	61%	35273	78%	**73	100%
Somchem MS200	<<locked>>	61%	32039	71%	**14	100%
[Somchem S265]*	<<locked>>	91%	32445	72%	**39	80%
Vihtavuori 3N37	<<locked>>	61%	30560	68%	**47	100%
Vihtavuori 3N38	<<locked>>	61%	22249	49%	**52	93%
Vihtavuori N105	<<locked>>	61%	18507	41%	**06	94%
[Vihtavuori N110]*	<<locked>>	81%	21915	49%	**88	80%
Vihtavuori N320	<<locked>>	61%	35926	80%	**75	100%
Vihtavuori N32C Tin Star	<<locked>>	60%	20726	46%	**9	100%
Vihtavuori N330	<<locked>>	61%	35331	79%	**11	100%
Vihtavuori N340	<<locked>>	61%	31865	71%	**11	100%
Vihtavuori N350	<<locked>>	61%	28108	63%	**11	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