Load data for .357 Maximum + .358 | 120gr | Rim Rock TC Cowboy

Recommended Powder(s): ADI AP 100, Vihtavuori 3N37, Vihtavuori N350

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.358 \| 120gr \| Rim Rock TC Cowboy
Manufacturer SKU:	#010
Bullet Weight:	120gr \| 7.8g
Bullet Diameter:	0.358" \| 9.09mm
Bullet Length:	0.569" \| 14.5mm
Caliber:	.357 Maximum load data
Case Length (l3):	1.600" \| 40.6mm
Cartridge Length (C.O.L.):	1.701" \| 43.2mm
Seated Depth:	0.468" \| 11.9mm
Shank Seated Depth:	0.468" \| 11.9mm
Case Capacity:	33.6 Grains of Water \| 2.18 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B10536_C515
Last updated:	2025-02-02

Load data for 120 loads in caliber .357 Maximum with .358 | 120gr | Rim Rock TC Cowboy bullet and 60 powders such as ADI AP 100, Vihtavuori 3N37, Vihtavuori N350. 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>>	95%	37927	84%	**27	99%
ADI AP 70N	<<locked>>	67%	39276	87%	**19	100%
ADI APS 350	<<locked>>	74%	38334	85%	**16	100%
ADI APS 450	<<locked>>	75%	37985	84%	**48	100%
ADI AS 30	<<locked>>	79%	40248	90%	**17	100%
ADI AS 50N	<<locked>>	74%	39798	89%	**63	100%
Accurate No. 2	<<locked>>	74%	39798	89%	**45	100%
Accurate No. 7	<<locked>>	75%	39334	87%	**93	92%
[Accurate No. 9]*	<<locked>>	83%	38725	86%	**63	86%
Accurate Solo 1000	<<locked>>	75%	37913	84%	**24	100%
Accurate Solo 1250	<<locked>>	81%	39871	89%	**09	100%
[Accurate TCM]*	<<locked>>	84%	39581	88%	**77	88%
[Alliant 2400]*	<<locked>>	95%	39914	89%	**03	83%
Alliant BLUE DOT	<<locked>>	97%	38740	86%	**77	91%
Alliant BULLSEYE	<<locked>>	70%	38218	85%	**68	100%
Alliant POWER PISTOL	<<locked>>	79%	38508	86%	**70	98%
Alliant UNIQUE	<<locked>>	80%	38899	87%	**72	100%
Baschieri & Pellagri 100	<<locked>>	76%	38392	85%	**27	100%
Hodgdon Clays	<<locked>>	74%	39073	87%	**42	100%
Hodgdon HS-6	<<locked>>	65%	39073	87%	**21	100%
Hodgdon Longshot	<<locked>>	63%	39726	88%	**21	100%
Hodgdon Universal	<<locked>>	73%	38218	85%	**99	100%
Hodgdon TrailBoss	<<locked>>	94%	15838	35%	**33	100%
Lovex D037.1	<<locked>>	75%	39334	87%	**93	92%
[Lovex D037.2]*	<<locked>>	83%	39537	88%	**73	86%
Lovex S011	<<locked>>	66%	39189	87%	**73	100%
Lovex S020	<<locked>>	72%	38363	85%	**22	100%
Maxam CSB 1	<<locked>>	85%	39798	89%	**99	100%
Maxam CSB 2	<<locked>>	78%	37913	84%	**80	100%
Maxam CSB 3	<<locked>>	80%	40321	90%	**80	100%
Maxam CSB 4	<<locked>>	78%	40451	90%	**67	100%
Maxam CSB 5	<<locked>>	72%	39030	87%	**88	100%
[Ramshot Enforcer]*	<<locked>>	94%	38551	86%	**99	84%
Ramshot Silhouette	<<locked>>	66%	39494	88%	**85	100%
Ramshot True Blue	<<locked>>	62%	40059	89%	**21	100%
ReloadSwiss RS 12	<<locked>>	70%	40103	89%	**80	100%
ReloadSwiss RS 14	<<locked>>	96%	15229	34%	**47	100%
ReloadSwiss RS 20	<<locked>>	82%	39682	88%	**72	100%
ReloadSwiss RS 24	<<locked>>	82%	39204	87%	**73	94%
Rottweil P 801	<<locked>>	65%	38537	86%	**37	100%
Rottweil P 806	<<locked>>	86%	39131	87%	**77	100%
SNPE Vectan A0	<<locked>>	83%	38899	87%	**26	100%
SNPE Vectan BA 9	<<locked>>	77%	40234	89%	**06	100%
SNPE Vectan BA10	<<locked>>	72%	39247	87%	**65	100%
SNPE Vectan BA7 1/2	<<locked>>	88%	39523	88%	**08	100%
SNPE Vectan BA9 1/2	<<locked>>	77%	39972	89%	**12	100%
[Shooters World Heavy Pistol]*	<<locked>>	83%	39537	88%	**73	86%
Shooters World Major Pistol	<<locked>>	75%	39334	87%	**93	92%
Somchem MP200	<<locked>>	73%	38435	85%	**62	100%
Somchem MS200	<<locked>>	78%	38276	85%	**39	100%
Somchem S221	<<locked>>	69%	39160	87%	**60	97%
Vihtavuori 3N37 👍	<<locked>>	81%	39334	87%	**24	100%
Vihtavuori 3N38	<<locked>>	92%	38377	85%	**47	95%
Vihtavuori N105	<<locked>>	97%	36114	80%	**80	98%
Vihtavuori N320	<<locked>>	74%	39073	87%	**53	100%
Vihtavuori N32C Tin Star	<<locked>>	94%	34650	77%	**12	100%
Vihtavuori N330	<<locked>>	76%	39842	89%	**19	100%
Vihtavuori N340	<<locked>>	79%	39407	88%	**55	100%
Vihtavuori N350 👍	<<locked>>	85%	40234	89%	**17	100%
Winchester 231	<<locked>>	65%	40437	90%	**03	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	15287	34%	**32	85%
ADI AP 70N	<<locked>>	61%	32532	72%	**24	100%
ADI APS 350	<<locked>>	61%	28558	64%	**88	100%
ADI APS 450	<<locked>>	61%	26919	60%	**91	100%
ADI AS 30	<<locked>>	61%	26440	59%	**27	100%
ADI AS 50N	<<locked>>	61%	28224	63%	**02	100%
Accurate No. 2	<<locked>>	60%	25527	57%	**42	100%
[Accurate No. 7]*	<<locked>>	61%	22814	51%	**75	82%
[Accurate No. 9]*	<<locked>>	76%	29762	66%	**16	81%
Accurate Solo 1000	<<locked>>	61%	26803	60%	**63	100%
Accurate Solo 1250	<<locked>>	61%	22640	50%	**50	100%
[Accurate TCM]*	<<locked>>	73%	27412	61%	**67	81%
[Alliant 2400]*	<<locked>>	90%	34055	76%	**11	80%
[Alliant BLUE DOT]*	<<locked>>	78%	22902	51%	**58	81%
Alliant BULLSEYE	<<locked>>	60%	29124	65%	**24	100%
Alliant POWER PISTOL	<<locked>>	61%	22524	50%	**65	91%
Alliant UNIQUE	<<locked>>	61%	23076	51%	**19	100%
Baschieri & Pellagri 100	<<locked>>	61%	25179	56%	**43	100%
Hodgdon Clays	<<locked>>	61%	29109	65%	**04	100%
Hodgdon HS-6	<<locked>>	61%	33228	74%	**19	99%
Hodgdon Longshot	<<locked>>	61%	37594	84%	**91	100%
Hodgdon Universal	<<locked>>	61%	27412	61%	**39	100%
Hodgdon TrailBoss	<<locked>>	62%	8151	18%	**1	100%
[Lovex D037.1]*	<<locked>>	61%	22814	51%	**75	82%
[Lovex D037.2]*	<<locked>>	74%	29080	65%	**03	81%
Lovex S011	<<locked>>	61%	34243	76%	**04	100%
Lovex S020	<<locked>>	61%	27282	61%	**62	100%
Maxam CSB 1	<<locked>>	61%	21683	48%	**27	100%
Maxam CSB 2	<<locked>>	61%	23395	52%	**57	100%
Maxam CSB 3	<<locked>>	62%	24976	56%	**66	100%
Maxam CSB 4	<<locked>>	61%	26731	59%	**70	100%
Maxam CSB 5	<<locked>>	61%	29385	65%	**60	100%
[Ramshot Enforcer]*	<<locked>>	90%	32822	73%	**08	81%
Ramshot Silhouette	<<locked>>	61%	33214	74%	**93	100%
Ramshot True Blue	<<locked>>	61%	37985	84%	**81	100%
ReloadSwiss RS 12	<<locked>>	61%	30951	69%	**62	100%
ReloadSwiss RS 14	<<locked>>	61%	7368	16%	**4	99%
ReloadSwiss RS 20	<<locked>>	61%	21495	48%	**86	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	20102	45%	**99	82%
Rottweil P 801	<<locked>>	60%	34055	76%	**75	100%
Rottweil P 806	<<locked>>	61%	16128	36%	**27	91%
SNPE Vectan A0	<<locked>>	61%	21814	49%	**57	100%
SNPE Vectan BA 9	<<locked>>	61%	26049	58%	**09	100%
SNPE Vectan BA10	<<locked>>	61%	30037	67%	**40	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	18391	41%	**07	94%
SNPE Vectan BA9 1/2	<<locked>>	61%	25382	56%	**06	100%
[Shooters World Heavy Pistol]*	<<locked>>	74%	29080	65%	**03	81%
[Shooters World Major Pistol]*	<<locked>>	61%	22814	51%	**75	82%
Somchem MP200	<<locked>>	61%	26484	59%	**75	100%
Somchem MS200	<<locked>>	61%	24381	54%	**19	100%
Somchem S221	<<locked>>	61%	30153	67%	**06	94%
Vihtavuori 3N37	<<locked>>	61%	21277	47%	**99	97%
[Vihtavuori 3N38]*	<<locked>>	67%	18188	40%	**47	81%
[Vihtavuori N105]*	<<locked>>	69%	14823	33%	**84	80%
Vihtavuori N320	<<locked>>	60%	27108	60%	**83	100%
Vihtavuori N32C Tin Star	<<locked>>	60%	15751	35%	**10	100%
Vihtavuori N330	<<locked>>	61%	26223	58%	**32	100%
Vihtavuori N340	<<locked>>	60%	22872	51%	**96	100%
Vihtavuori N350	<<locked>>	61%	19827	44%	**63	96%
Winchester 231	<<locked>>	61%	35926	80%	**40	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