Load data for .357 Maximum + .355 | 124gr | Geco HEXAGON

Recommended Powder(s): Alliant POWER PISTOL, Rottweil P 806, SNPE Vectan BA7 1/2, Somchem S221

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.355 \| 124gr \| Geco HEXAGON
Manufacturer SKU:	2319010
Bullet Weight:	124gr \| 8.0g
Bullet Diameter:	0.355" \| 9.02mm
Bullet Length:	0.611" \| 15.5mm
Caliber:	.357 Maximum load data
Case Length (l3):	1.600" \| 40.6mm
Cartridge Length (C.O.L.):	1.960" \| 49.8mm
Seated Depth:	0.251" \| 6.4mm
Shank Seated Depth:	0.251" \| 6.4mm
Case Capacity:	33.6 Grains of Water \| 2.18 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B9010_C515
Last updated:	2025-01-01

Load data for 108 loads in caliber .357 Maximum with .355 | 124gr | Geco HEXAGON bullet and 54 powders such as Alliant POWER PISTOL, Rottweil P 806, SNPE Vectan BA7 1/2, Somchem S221. 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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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>>	88%	38957	87%	**40	100%
ADI APS 350	<<locked>>	72%	39363	88%	**52	100%
ADI APS 450	<<locked>>	73%	39378	88%	**81	100%
ADI AS 30	<<locked>>	72%	39160	87%	**24	100%
ADI AS 50N	<<locked>>	67%	38377	85%	**53	100%
[Accurate 4100]*	<<locked>>	88%	39001	87%	**90	82%
Accurate No. 2	<<locked>>	68%	39015	87%	**62	100%
Accurate No. 7	<<locked>>	69%	40422	90%	**22	95%
[Accurate No. 9]*	<<locked>>	76%	39668	88%	**06	89%
Accurate Solo 1000	<<locked>>	72%	39784	88%	**60	100%
Accurate Solo 1250	<<locked>>	74%	38740	86%	**06	100%
Accurate TCM	<<locked>>	77%	40001	89%	**03	91%
[Alliant 2400]*	<<locked>>	86%	39334	87%	**16	86%
Alliant BLUE DOT	<<locked>>	88%	38986	87%	**96	93%
Alliant BULLSEYE	<<locked>>	65%	38653	86%	**81	100%
Alliant POWER PISTOL 👍	<<locked>>	73%	40422	90%	**22	100%
Alliant UNIQUE	<<locked>>	74%	39914	89%	**01	100%
Baschieri & Pellagri 100	<<locked>>	72%	39726	88%	**63	100%
Hodgdon Clays	<<locked>>	72%	40147	89%	**78	100%
[Hodgdon LilGun]*	<<locked>>	96%	38392	85%	**65	86%
Hodgdon Universal	<<locked>>	69%	39769	88%	**35	100%
Hodgdon TrailBoss	<<locked>>	95%	19305	43%	**02	100%
Lovex D037.1	<<locked>>	69%	40422	90%	**22	95%
[Lovex D037.2]*	<<locked>>	75%	38841	86%	**96	89%
Lovex S020	<<locked>>	66%	38392	85%	**32	100%
Maxam CSB 1	<<locked>>	78%	39494	88%	**03	100%
Maxam CSB 2	<<locked>>	73%	39929	89%	**99	100%
Maxam CSB 3	<<locked>>	73%	39465	88%	**76	100%
Maxam CSB 4	<<locked>>	72%	39842	89%	**63	100%
Maxam CSB 5	<<locked>>	68%	39204	87%	**11	100%
[Ramshot Enforcer]*	<<locked>>	86%	39958	89%	**36	88%
ReloadSwiss RS 12	<<locked>>	63%	39131	87%	**73	100%
ReloadSwiss RS 14	<<locked>>	96%	18637	41%	**19	100%
ReloadSwiss RS 20	<<locked>>	74%	39131	87%	**75	100%
ReloadSwiss RS 24	<<locked>>	74%	39349	88%	**99	96%
Rottweil P 806 👍	<<locked>>	77%	39711	88%	**93	100%
SNPE Vectan A0	<<locked>>	76%	38914	87%	**42	100%
SNPE Vectan BA 9	<<locked>>	70%	38841	86%	**09	100%
SNPE Vectan BA10	<<locked>>	68%	39363	88%	**81	100%
SNPE Vectan BA7 1/2 👍	<<locked>>	81%	39537	88%	**08	100%
SNPE Vectan BA9 1/2	<<locked>>	70%	38682	86%	**12	100%
[Shooters World Heavy Pistol]*	<<locked>>	75%	38841	86%	**96	89%
Shooters World Major Pistol	<<locked>>	69%	40422	90%	**22	95%
Somchem MP200	<<locked>>	67%	38798	86%	**65	100%
Somchem MS200	<<locked>>	72%	38928	87%	**45	100%
Somchem S221 👍	<<locked>>	63%	40277	90%	**86	99%
Vihtavuori 3N37	<<locked>>	74%	39378	88%	**24	100%
Vihtavuori 3N38	<<locked>>	85%	40118	89%	**96	97%
Vihtavuori N105	<<locked>>	89%	39204	87%	**19	99%
Vihtavuori N320	<<locked>>	69%	40132	89%	**67	100%
Vihtavuori N32C Tin Star	<<locked>>	93%	39320	87%	**78	100%
Vihtavuori N330	<<locked>>	69%	38972	87%	**19	100%
Vihtavuori N340	<<locked>>	72%	38798	86%	**55	100%
Vihtavuori N350	<<locked>>	77%	39160	87%	**11	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	18869	42%	**43	91%
ADI APS 350	<<locked>>	61%	31386	70%	**50	100%
ADI APS 450	<<locked>>	61%	30110	67%	**57	100%
ADI AS 30	<<locked>>	60%	29617	66%	**86	100%
ADI AS 50N	<<locked>>	61%	32735	73%	**78	100%
[Accurate 4100]*	<<locked>>	86%	35868	80%	**34	80%
Accurate No. 2	<<locked>>	61%	31009	69%	**37	100%
Accurate No. 7	<<locked>>	61%	29936	67%	**42	90%
[Accurate No. 9]*	<<locked>>	64%	25135	56%	**30	80%
Accurate Solo 1000	<<locked>>	61%	30153	67%	**32	100%
Accurate Solo 1250	<<locked>>	61%	27717	62%	**39	100%
[Accurate TCM]*	<<locked>>	62%	24163	54%	**01	81%
[Alliant 2400]*	<<locked>>	77%	29675	66%	**32	80%
[Alliant BLUE DOT]*	<<locked>>	65%	20218	45%	**89	80%
Alliant BULLSEYE	<<locked>>	61%	34795	77%	**29	100%
Alliant POWER PISTOL	<<locked>>	61%	27731	62%	**80	96%
Alliant UNIQUE	<<locked>>	61%	27804	62%	**01	100%
Baschieri & Pellagri 100	<<locked>>	61%	30168	67%	**32	100%
Hodgdon Clays	<<locked>>	61%	32068	71%	**63	100%
[Hodgdon LilGun]*	<<locked>>	90%	31053	69%	**14	80%
Hodgdon Universal	<<locked>>	61%	32227	72%	**30	100%
Hodgdon TrailBoss	<<locked>>	62%	10080	22%	**3	100%
Lovex D037.1	<<locked>>	61%	29936	67%	**42	90%
[Lovex D037.2]*	<<locked>>	63%	25657	57%	**44	81%
Lovex S020	<<locked>>	61%	32590	72%	**53	100%
Maxam CSB 1	<<locked>>	61%	25802	57%	**99	100%
Maxam CSB 2	<<locked>>	61%	28892	64%	**52	100%
Maxam CSB 3	<<locked>>	61%	28384	63%	**29	100%
Maxam CSB 4	<<locked>>	61%	30356	68%	**32	100%
Maxam CSB 5	<<locked>>	61%	33098	74%	**22	100%
[Ramshot Enforcer]*	<<locked>>	77%	28572	64%	**19	80%
ReloadSwiss RS 12	<<locked>>	61%	37043	82%	**53	100%
ReloadSwiss RS 14	<<locked>>	61%	9340	21%	**3	100%
ReloadSwiss RS 20	<<locked>>	61%	27006	60%	**88	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	25222	56%	**30	89%
Rottweil P 806	<<locked>>	61%	22858	51%	**78	97%
SNPE Vectan A0	<<locked>>	61%	25860	58%	**35	100%
SNPE Vectan BA 9	<<locked>>	61%	30458	68%	**88	100%
SNPE Vectan BA10	<<locked>>	61%	33692	75%	**09	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	22597	50%	**19	98%
SNPE Vectan BA9 1/2	<<locked>>	61%	29820	66%	**88	100%
[Shooters World Heavy Pistol]*	<<locked>>	63%	25657	57%	**44	81%
Shooters World Major Pistol	<<locked>>	61%	29936	67%	**42	90%
Somchem MP200	<<locked>>	61%	31836	71%	**73	100%
Somchem MS200	<<locked>>	61%	28689	64%	**98	100%
Somchem S221	<<locked>>	61%	37333	83%	**47	98%
Vihtavuori 3N37	<<locked>>	61%	26614	59%	**21	100%
[Vihtavuori 3N38]*	<<locked>>	61%	19043	42%	**66	85%
[Vihtavuori N105]*	<<locked>>	61%	15331	34%	**94	83%
Vihtavuori N320	<<locked>>	61%	31952	71%	**62	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	19464	43%	**86	100%
Vihtavuori N330	<<locked>>	61%	31314	70%	**11	100%
Vihtavuori N340	<<locked>>	61%	28065	62%	**88	100%
Vihtavuori N350	<<locked>>	61%	24642	55%	**75	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.