Load data for .357 Magnum + .358 | 130gr | Rim Rock RNFP Cowboy

Recommended Powder(s): Alliant UNIQUE, Ramshot True Blue, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.358 \| 130gr \| Rim Rock RNFP Cowboy
Manufacturer SKU:	#013
Bullet Weight:	130gr \| 8.4g
Bullet Diameter:	0.358" \| 9.09mm
Bullet Length:	0.566" \| 14.4mm
Caliber:	.357 Magnum load data
Case Length (l3):	1.290" \| 32.8mm
Cartridge Length (C.O.L.):	1.328" \| 33.7mm
Seated Depth:	0.528" \| 13.4mm
Shank Seated Depth:	0.528" \| 13.4mm
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_B10539_C513
Last updated:	2025-01-01

Load data for 114 loads in caliber .357 Magnum with .358 | 130gr | Rim Rock RNFP Cowboy bullet and 57 powders such as Alliant UNIQUE, Ramshot True Blue, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200. 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>>	94%	24860	57%	**01	90%
ADI AP 70N	<<locked>>	77%	37405	86%	**02	100%
ADI AS 30	<<locked>>	88%	38087	88%	**98	100%
ADI AS 50N	<<locked>>	85%	38624	89%	**53	100%
Accurate No. 2	<<locked>>	81%	34548	79%	**70	100%
Accurate No. 5	<<locked>>	69%	37014	85%	**85	97%
[Accurate No. 7]*	<<locked>>	87%	35723	82%	**14	86%
Accurate Solo 1000	<<locked>>	87%	38667	89%	**30	100%
Accurate Solo 1250	<<locked>>	90%	35563	82%	**57	100%
Alliant BULLSEYE	<<locked>>	81%	37318	86%	**48	100%
Alliant POWER PISTOL	<<locked>>	92%	36912	85%	**30	95%
Alliant UNIQUE 👍	<<locked>>	92%	36143	83%	**45	100%
Baschieri & Pellagri 100	<<locked>>	85%	35737	82%	**07	100%
Hodgdon Clays	<<locked>>	78%	35056	81%	**93	100%
Hodgdon HP38	<<locked>>	64%	36753	84%	**53	100%
Hodgdon HS-6	<<locked>>	75%	36941	85%	**71	99%
Hodgdon Longshot	<<locked>>	72%	37666	87%	**71	99%
Hodgdon Universal	<<locked>>	83%	35476	82%	**80	100%
Hodgdon TrailBoss	<<locked>>	94%	11168	26%	**7	100%
Lovex D036	<<locked>>	69%	36970	85%	**85	97%
[Lovex D037.1]*	<<locked>>	87%	35723	82%	**14	86%
Lovex S011	<<locked>>	73%	36158	83%	**30	100%
Lovex S020	<<locked>>	85%	38798	89%	**29	100%
Maxam CSB 1	<<locked>>	93%	34882	80%	**50	100%
Maxam CSB 2	<<locked>>	93%	36840	85%	**83	100%
Maxam CSB 3	<<locked>>	91%	38029	87%	**57	100%
Maxam CSB 4	<<locked>>	85%	36419	84%	**24	100%
Maxam CSB 5	<<locked>>	81%	37231	86%	**81	100%
Ramshot Silhouette	<<locked>>	77%	38812	89%	**65	100%
Ramshot True Blue 👍	<<locked>>	72%	38334	88%	**75	100%
Ramshot Zip	<<locked>>	67%	39088	90%	**86	100%
ReloadSwiss RS 12	<<locked>>	82%	38595	89%	**86	100%
ReloadSwiss RS 14	<<locked>>	92%	9616	22%	**7	99%
ReloadSwiss RS 20 👍	<<locked>>	94%	36738	84%	**48	100%
ReloadSwiss RS 24	<<locked>>	95%	37550	86%	**27	90%
Rottweil P 801	<<locked>>	76%	38769	89%	**53	100%
Rottweil P 806	<<locked>>	96%	30008	69%	**81	98%
SNPE Vectan A0 👍	<<locked>>	94%	36782	85%	**96	100%
SNPE Vectan BA 9	<<locked>>	85%	36825	85%	**73	100%
SNPE Vectan BA10	<<locked>>	76%	35998	83%	**25	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	32924	76%	**96	98%
SNPE Vectan BA9 1/2	<<locked>>	87%	36811	85%	**83	100%
Shooters World Auto Pistol	<<locked>>	69%	36970	85%	**85	97%
[Shooters World Major Pistol]*	<<locked>>	87%	35723	82%	**14	86%
Somchem MP200	<<locked>>	84%	36361	84%	**32	100%
Somchem MS200 👍	<<locked>>	90%	37768	87%	**25	100%
Somchem S221	<<locked>>	79%	36361	84%	**91	92%
Vihtavuori 3N37	<<locked>>	93%	36376	84%	**75	100%
[Vihtavuori 3N38]*	<<locked>>	94%	25672	59%	**34	84%
[Vihtavuori N105]*	<<locked>>	97%	20653	47%	**88	83%
Vihtavuori N310	<<locked>>	71%	38885	89%	**61	100%
Vihtavuori N320	<<locked>>	84%	37463	86%	**40	100%
Vihtavuori N32C Tin Star	<<locked>>	94%	24831	57%	**30	100%
Vihtavuori N330	<<locked>>	86%	36912	85%	**99	100%
Vihtavuori N340	<<locked>>	89%	35926	83%	**06	100%
Vihtavuori N350	<<locked>>	94%	34722	80%	**48	99%
Winchester 231	<<locked>>	73%	37333	86%	**70	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	74%	14939	34%	**8	80%
ADI AP 70N	<<locked>>	62%	24105	55%	**29	100%
ADI AS 30	<<locked>>	61%	20262	47%	**1	100%
ADI AS 50N	<<locked>>	61%	21379	49%	**30	100%
Accurate No. 2	<<locked>>	60%	18028	41%	**14	96%
Accurate No. 5	<<locked>>	61%	27905	64%	**53	94%
[Accurate No. 7]*	<<locked>>	79%	27166	62%	**86	81%
Accurate Solo 1000	<<locked>>	62%	20987	48%	**07	100%
Accurate Solo 1250	<<locked>>	62%	16737	38%	**4	100%
Alliant BULLSEYE	<<locked>>	60%	20900	48%	**02	99%
[Alliant POWER PISTOL]*	<<locked>>	64%	16476	38%	**50	81%
Alliant UNIQUE	<<locked>>	62%	16418	38%	**14	97%
Baschieri & Pellagri 100	<<locked>>	62%	19174	44%	**1	100%
Hodgdon Clays	<<locked>>	60%	23163	53%	**1	100%
Hodgdon HP38	<<locked>>	61%	32909	76%	**14	100%
Hodgdon HS-6	<<locked>>	61%	22829	52%	**52	93%
Hodgdon Longshot	<<locked>>	62%	25730	59%	**04	96%
Hodgdon Universal	<<locked>>	62%	20030	46%	**60	100%
Hodgdon TrailBoss	<<locked>>	69%	6817	16%	**3	99%
Lovex D036	<<locked>>	61%	27862	64%	**53	94%
[Lovex D037.1]*	<<locked>>	79%	27166	62%	**86	81%
Lovex S011	<<locked>>	61%	25092	58%	**99	100%
Lovex S020	<<locked>>	61%	18695	43%	**50	99%
Maxam CSB 1	<<locked>>	60%	14924	34%	**5	99%
Maxam CSB 2	<<locked>>	61%	15403	35%	**8	100%
Maxam CSB 3	<<locked>>	62%	18550	43%	**7	100%
Maxam CSB 4	<<locked>>	61%	19493	45%	**01	100%
Maxam CSB 5	<<locked>>	61%	22162	51%	**7	100%
Ramshot Silhouette	<<locked>>	62%	23641	54%	**55	99%
Ramshot True Blue	<<locked>>	61%	26324	60%	**11	97%
Ramshot Zip	<<locked>>	60%	31705	73%	**04	100%
ReloadSwiss RS 12	<<locked>>	62%	21451	49%	**76	100%
ReloadSwiss RS 14	<<locked>>	76%	7107	16%	**2	97%
ReloadSwiss RS 20	<<locked>>	61%	14402	33%	**4	97%
[ReloadSwiss RS 24]*	<<locked>>	80%	23627	54%	**04	81%
Rottweil P 801	<<locked>>	61%	24555	56%	**86	100%
[Rottweil P 806]*	<<locked>>	69%	11385	26%	**1	81%
SNPE Vectan A0	<<locked>>	60%	15098	35%	**2	95%
SNPE Vectan BA 9	<<locked>>	61%	19261	44%	**20	100%
SNPE Vectan BA10	<<locked>>	61%	24932	57%	**01	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	62%	13053	30%	**9	84%
SNPE Vectan BA9 1/2	<<locked>>	62%	18782	43%	**24	100%
Shooters World Auto Pistol	<<locked>>	61%	27862	64%	**53	94%
[Shooters World Major Pistol]*	<<locked>>	79%	27166	62%	**86	81%
Somchem MP200	<<locked>>	62%	19087	44%	**63	97%
Somchem MS200	<<locked>>	61%	17289	40%	**10	98%
[Somchem S221]*	<<locked>>	61%	19232	44%	**96	81%
[Vihtavuori 3N37]*	<<locked>>	61%	13822	32%	**5	87%
[Vihtavuori 3N38]*	<<locked>>	91%	23322	54%	**94	82%
[Vihtavuori N105]*	<<locked>>	93%	18739	43%	**38	81%
Vihtavuori N310	<<locked>>	61%	29936	69%	**73	100%
Vihtavuori N320	<<locked>>	61%	19537	45%	**14	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	11037	25%	**7	100%
Vihtavuori N330	<<locked>>	61%	17332	40%	**27	100%
Vihtavuori N340	<<locked>>	60%	15563	36%	**1	97%
[Vihtavuori N350]*	<<locked>>	60%	12502	29%	**5	86%
Winchester 231	<<locked>>	62%	26934	62%	**45	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