Load data for .357 Maximum + .358 | 158gr | Rim Rock RN Cowboy

Recommended Powder(s): ADI AP 100

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.358 \| 158gr \| Rim Rock RN Cowboy
Manufacturer SKU:	#014
Bullet Weight:	158gr \| 10.2g
Bullet Diameter:	0.358" \| 9.09mm
Bullet Length:	0.687" \| 17.4mm
Caliber:	.357 Maximum load data
Case Length (l3):	1.600" \| 40.6mm
Cartridge Length (C.O.L.):	1.960" \| 49.8mm
Seated Depth:	0.327" \| 8.3mm
Shank Seated Depth:	0.327" \| 8.3mm
Case Capacity:	33.6 Grains of Water \| 2.18 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B10540_C515
Last updated:	2025-01-01

Load data for 110 loads in caliber .357 Maximum with .358 | 158gr | Rim Rock RN Cowboy bullet and 55 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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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%	38798	86%	**47	100%
ADI APS 350	<<locked>>	69%	38334	85%	**65	100%
ADI APS 450	<<locked>>	71%	39218	87%	**98	100%
ADI AS 30	<<locked>>	72%	40321	90%	**43	100%
ADI AS 50N	<<locked>>	66%	38899	87%	**66	100%
[Accurate 4100]*	<<locked>>	85%	38899	87%	**12	87%
Accurate No. 2	<<locked>>	67%	40132	89%	**65	100%
Accurate No. 7	<<locked>>	66%	39682	88%	**12	97%
Accurate No. 9	<<locked>>	74%	40001	89%	**19	93%
Accurate Solo 1000	<<locked>>	70%	40350	90%	**66	100%
Accurate Solo 1250	<<locked>>	72%	39392	88%	**06	100%
Accurate TCM	<<locked>>	74%	39972	89%	**06	94%
Alliant 2400	<<locked>>	83%	39914	89%	**35	91%
Alliant BLUE DOT	<<locked>>	85%	39494	88%	**99	96%
Alliant BULLSEYE	<<locked>>	63%	39291	87%	**75	100%
Alliant POWER PISTOL	<<locked>>	69%	39001	87%	**80	100%
Alliant UNIQUE	<<locked>>	71%	39117	87%	**78	100%
Baschieri & Pellagri 100	<<locked>>	70%	39784	88%	**66	100%
Hodgdon Clays	<<locked>>	69%	39436	88%	**81	100%
[Hodgdon H110]*	<<locked>>	92%	40190	89%	**52	84%
Hodgdon LilGun	<<locked>>	93%	39581	88%	**88	91%
Hodgdon Universal	<<locked>>	67%	40263	90%	**25	100%
Hodgdon TrailBoss	<<locked>>	96%	20813	46%	**8	100%
Lovex D037.1	<<locked>>	66%	39682	88%	**12	97%
Lovex D037.2	<<locked>>	72%	39059	87%	**06	93%
Lovex S020	<<locked>>	65%	39465	88%	**35	100%
Maxam CSB 1	<<locked>>	75%	39320	87%	**06	100%
Maxam CSB 2	<<locked>>	70%	38450	86%	**89	100%
Maxam CSB 3	<<locked>>	70%	38435	85%	**66	100%
Maxam CSB 4	<<locked>>	68%	38363	85%	**57	100%
Maxam CSB 5	<<locked>>	66%	38914	87%	**17	100%
Ramshot Enforcer	<<locked>>	83%	39682	88%	**39	92%
ReloadSwiss RS 14	<<locked>>	96%	19551	43%	**1	100%
ReloadSwiss RS 20	<<locked>>	71%	38914	87%	**55	100%
ReloadSwiss RS 24	<<locked>>	72%	39436	88%	**96	99%
Rottweil P 806	<<locked>>	74%	39479	88%	**70	100%
SNPE Vectan A0	<<locked>>	75%	40451	90%	**48	100%
SNPE Vectan BA 9	<<locked>>	69%	40176	89%	**25	100%
SNPE Vectan BA10	<<locked>>	66%	39218	87%	**98	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	97%	26121	58%	**12	86%
SNPE Vectan BA7 1/2	<<locked>>	78%	38943	87%	**01	100%
SNPE Vectan BA9 1/2	<<locked>>	70%	40451	90%	**29	100%
Shooters World Heavy Pistol	<<locked>>	72%	39059	87%	**06	93%
Shooters World Major Pistol	<<locked>>	66%	39682	88%	**12	97%
Somchem MP200	<<locked>>	67%	40350	90%	**85	100%
Somchem MS200	<<locked>>	71%	40248	90%	**55	100%
Vihtavuori 3N37	<<locked>>	71%	39450	88%	**14	100%
Vihtavuori 3N38	<<locked>>	80%	38653	86%	**73	99%
Vihtavuori N105	<<locked>>	86%	40263	90%	**22	100%
[Vihtavuori N110]*	<<locked>>	97%	33228	74%	**47	87%
Vihtavuori N320	<<locked>>	65%	38682	86%	**53	100%
Vihtavuori N32C Tin Star	<<locked>>	93%	40422	90%	**11	100%
Vihtavuori N330	<<locked>>	67%	39929	89%	**19	100%
Vihtavuori N340	<<locked>>	71%	40147	89%	**65	100%
Vihtavuori N350	<<locked>>	74%	38972	87%	**07	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AP 100	<<locked>>	61%	20436	45%	**32	96%
ADI APS 350	<<locked>>	61%	31995	71%	**83	100%
ADI APS 450	<<locked>>	61%	31082	69%	**99	100%
ADI AS 30	<<locked>>	62%	31633	70%	**35	100%
ADI AS 50N	<<locked>>	61%	34664	77%	**17	100%
[Accurate 4100]*	<<locked>>	76%	28442	63%	**39	80%
Accurate No. 2	<<locked>>	61%	33214	74%	**76	100%
Accurate No. 7	<<locked>>	61%	32895	73%	**17	95%
[Accurate No. 9]*	<<locked>>	61%	25135	56%	**60	85%
Accurate Solo 1000	<<locked>>	61%	31908	71%	**68	100%
Accurate Solo 1250	<<locked>>	61%	29080	65%	**84	100%
[Accurate TCM]*	<<locked>>	61%	25164	56%	**66	86%
[Alliant 2400]*	<<locked>>	68%	24134	54%	**63	81%
[Alliant BLUE DOT]*	<<locked>>	61%	19058	42%	**25	84%
Alliant BULLSEYE	<<locked>>	61%	37057	82%	**45	100%
Alliant POWER PISTOL	<<locked>>	61%	30052	67%	**52	99%
Alliant UNIQUE	<<locked>>	61%	29501	66%	**50	100%
Baschieri & Pellagri 100	<<locked>>	61%	31372	70%	**65	100%
Hodgdon Clays	<<locked>>	61%	32735	73%	**06	100%
[Hodgdon H110]*	<<locked>>	87%	33663	75%	**53	80%
[Hodgdon LilGun]*	<<locked>>	80%	24497	54%	**29	80%
Hodgdon Universal	<<locked>>	61%	34026	76%	**57	100%
Hodgdon TrailBoss	<<locked>>	61%	10225	23%	**1	100%
Lovex D037.1	<<locked>>	61%	32895	73%	**17	95%
[Lovex D037.2]*	<<locked>>	61%	25860	58%	**80	85%
Lovex S020	<<locked>>	61%	35186	78%	**83	100%
Maxam CSB 1	<<locked>>	61%	27775	62%	**55	100%
Maxam CSB 2	<<locked>>	61%	30269	67%	**84	100%
Maxam CSB 3	<<locked>>	61%	30298	67%	**71	100%
Maxam CSB 4	<<locked>>	61%	32111	71%	**75	100%
Maxam CSB 5	<<locked>>	61%	34563	77%	**65	100%
[Ramshot Enforcer]*	<<locked>>	67%	22713	51%	**34	80%
ReloadSwiss RS 14	<<locked>>	62%	9776	22%	**1	100%
ReloadSwiss RS 20	<<locked>>	61%	29167	65%	**34	100%
ReloadSwiss RS 24	<<locked>>	61%	27905	62%	**09	94%
Rottweil P 806	<<locked>>	61%	24772	55%	**60	100%
SNPE Vectan A0	<<locked>>	61%	27441	61%	**91	100%
SNPE Vectan BA 9	<<locked>>	61%	32387	72%	**30	100%
SNPE Vectan BA10	<<locked>>	61%	35027	78%	**48	100%
[SNPE Vectan BA6 1/2]*	<<locked>>	89%	20798	46%	**88	81%
SNPE Vectan BA7 1/2	<<locked>>	61%	24395	54%	**84	100%
SNPE Vectan BA9 1/2	<<locked>>	61%	32445	72%	**34	100%
[Shooters World Heavy Pistol]*	<<locked>>	61%	25860	58%	**80	85%
Shooters World Major Pistol	<<locked>>	61%	32895	73%	**17	95%
Somchem MP200	<<locked>>	61%	34505	77%	**16	100%
Somchem MS200	<<locked>>	61%	30371	68%	**37	100%
Vihtavuori 3N37	<<locked>>	61%	28660	64%	**73	100%
Vihtavuori 3N38	<<locked>>	61%	20827	46%	**65	91%
Vihtavuori N105	<<locked>>	61%	16940	38%	**09	91%
[Vihtavuori N110]*	<<locked>>	86%	23351	52%	**70	80%
Vihtavuori N320	<<locked>>	61%	34142	76%	**07	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	20218	45%	**8	100%
Vihtavuori N330	<<locked>>	61%	33446	74%	**43	100%
Vihtavuori N340	<<locked>>	61%	30052	67%	**30	100%
Vihtavuori N350	<<locked>>	61%	26281	58%	**34	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