Load data for .38-45 ACP + .358 | 120gr | Rim Rock TC Cowboy

Recommended Powder(s): Alliant BULLSEYE, Lovex S020, Ramshot Silhouette, ReloadSwiss RS 20, Somchem MP200

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:	.38-45 ACP load data
Case Length (l3):	0.898" \| 22.8mm
Cartridge Length (C.O.L.):	1.067" \| 27.1mm
Seated Depth:	0.400" \| 10.2mm
Shank Seated Depth:	0.400" \| 10.2mm
Case Capacity:	22.0 Grains of Water \| 1.43 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B10536_C596
Last updated:	2025-01-01

Load data for 102 loads in caliber .38-45 ACP with .358 | 120gr | Rim Rock TC Cowboy bullet and 51 powders such as Alliant BULLSEYE, Lovex S020, Ramshot Silhouette, ReloadSwiss RS 20, Somchem MP200. 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%	22669	67%	**14	86%
ADI AP 70N	<<locked>>	73%	30414	89%	**93	100%
ADI APS 350	<<locked>>	74%	30023	88%	**86	100%
ADI APS 450	<<locked>>	73%	27934	82%	**96	100%
ADI AS 30	<<locked>>	77%	27499	81%	**45	100%
ADI AS 50N	<<locked>>	75%	28181	83%	**01	100%
Accurate No. 2	<<locked>>	79%	29631	87%	**66	99%
Accurate No. 5	<<locked>>	64%	28007	82%	**12	92%
Accurate Solo 1000	<<locked>>	77%	28079	82%	**78	100%
Accurate Solo 1250	<<locked>>	85%	28601	84%	**47	100%
Alliant BULLSEYE 👍	<<locked>>	75%	28892	85%	**06	100%
Alliant POWER PISTOL	<<locked>>	89%	30560	90%	**04	91%
Alliant UNIQUE	<<locked>>	88%	29530	87%	**32	100%
Baschieri & Pellagri 100	<<locked>>	80%	29037	85%	**98	100%
Hodgdon Clays	<<locked>>	74%	30284	89%	**06	100%
Hodgdon HS-6	<<locked>>	70%	27775	81%	**02	94%
Hodgdon Longshot	<<locked>>	69%	29776	87%	**39	97%
Hodgdon Universal	<<locked>>	79%	28921	85%	**70	100%
Hodgdon TrailBoss	<<locked>>	97%	10515	31%	**7	100%
Lovex D036	<<locked>>	64%	27963	82%	**22	92%
Lovex S011	<<locked>>	69%	29530	87%	**24	100%
Lovex S020 👍	<<locked>>	77%	27833	82%	**70	100%
Maxam CSB 1	<<locked>>	91%	30081	88%	**63	100%
Maxam CSB 2	<<locked>>	88%	29428	86%	**80	100%
Maxam CSB 3	<<locked>>	81%	27746	81%	**11	100%
Maxam CSB 4	<<locked>>	80%	29515	87%	**14	100%
Maxam CSB 5	<<locked>>	75%	30008	88%	**71	100%
Ramshot Silhouette 👍	<<locked>>	72%	29298	86%	**12	99%
Ramshot True Blue	<<locked>>	67%	29037	85%	**16	96%
ReloadSwiss RS 12	<<locked>>	74%	27688	81%	**40	100%
ReloadSwiss RS 14	<<locked>>	95%	9036	27%	**4	98%
ReloadSwiss RS 20 👍	<<locked>>	91%	29631	87%	**39	100%
[ReloadSwiss RS 24]*	<<locked>>	90%	28456	83%	**45	82%
Rottweil P 801	<<locked>>	69%	27905	82%	**07	100%
Rottweil P 806	<<locked>>	95%	23627	69%	**58	93%
SNPE Vectan A0	<<locked>>	88%	29051	85%	**66	100%
SNPE Vectan BA 9	<<locked>>	77%	27630	81%	**24	100%
SNPE Vectan BA10	<<locked>>	71%	29733	87%	**19	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	30139	88%	**22	96%
SNPE Vectan BA9 1/2	<<locked>>	83%	30313	89%	**80	100%
Shooters World Auto Pistol	<<locked>>	64%	27963	82%	**22	92%
Somchem MP200 👍	<<locked>>	81%	30124	88%	**19	100%
Somchem MS200	<<locked>>	82%	28036	82%	**66	100%
[Somchem S221]*	<<locked>>	77%	30342	89%	**68	87%
Vihtavuori 3N37	<<locked>>	90%	29762	87%	**55	97%
Vihtavuori N320	<<locked>>	79%	29921	88%	**34	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	23656	69%	**83	100%
Vihtavuori N330	<<locked>>	82%	29414	86%	**93	100%
Vihtavuori N340	<<locked>>	83%	27514	81%	**70	100%
Vihtavuori N350	<<locked>>	91%	28021	82%	**19	97%
Winchester 231	<<locked>>	69%	30603	90%	**63	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	86%	18318	54%	**19	82%
ADI AP 70N	<<locked>>	62%	21466	63%	**52	100%
ADI APS 350	<<locked>>	62%	22452	66%	**4	100%
ADI APS 450	<<locked>>	62%	21277	62%	**04	100%
ADI AS 30	<<locked>>	60%	18028	53%	**4	100%
ADI AS 50N	<<locked>>	61%	19058	56%	**56	100%
Accurate No. 2	<<locked>>	62%	17202	50%	**47	93%
Accurate No. 5	<<locked>>	62%	25512	75%	**70	90%
Accurate Solo 1000	<<locked>>	61%	18840	55%	**27	100%
Accurate Solo 1250	<<locked>>	61%	14852	44%	**4	99%
Alliant BULLSEYE	<<locked>>	62%	19957	59%	**45	98%
[Alliant POWER PISTOL]*	<<locked>>	71%	18376	54%	**55	81%
Alliant UNIQUE	<<locked>>	61%	14489	43%	**20	94%
Baschieri & Pellagri 100	<<locked>>	61%	17114	50%	**07	100%
Hodgdon Clays	<<locked>>	62%	22727	67%	**04	100%
Hodgdon HS-6	<<locked>>	61%	20697	61%	**71	90%
Hodgdon Longshot	<<locked>>	60%	22075	65%	**98	93%
Hodgdon Universal	<<locked>>	62%	17753	52%	**76	100%
Hodgdon TrailBoss	<<locked>>	71%	6396	19%	**6	98%
Lovex D036	<<locked>>	62%	25469	75%	**70	90%
Lovex S011	<<locked>>	60%	22756	67%	**25	100%
Lovex S020	<<locked>>	61%	16520	48%	**60	97%
Maxam CSB 1	<<locked>>	62%	14228	42%	**1	98%
Maxam CSB 2	<<locked>>	60%	13242	39%	**1	100%
Maxam CSB 3	<<locked>>	61%	16317	48%	**10	100%
Maxam CSB 4	<<locked>>	60%	17361	51%	**20	100%
Maxam CSB 5	<<locked>>	60%	19638	58%	**24	100%
Ramshot Silhouette	<<locked>>	62%	21219	62%	**75	97%
Ramshot True Blue	<<locked>>	61%	23830	70%	**27	94%
ReloadSwiss RS 12	<<locked>>	61%	18550	54%	**99	100%
ReloadSwiss RS 14	<<locked>>	70%	5642	17%	**3	92%
ReloadSwiss RS 20	<<locked>>	61%	12676	37%	**1	94%
[ReloadSwiss RS 24]*	<<locked>>	87%	25730	75%	**02	80%
Rottweil P 801	<<locked>>	61%	21973	64%	**19	100%
[Rottweil P 806]*	<<locked>>	75%	12038	35%	**56	80%
SNPE Vectan A0	<<locked>>	62%	14446	42%	**4	93%
SNPE Vectan BA 9	<<locked>>	61%	17318	51%	**37	99%
SNPE Vectan BA10	<<locked>>	61%	22771	67%	**27	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	62%	11734	34%	**5	80%
SNPE Vectan BA9 1/2	<<locked>>	61%	16650	49%	**40	99%
Shooters World Auto Pistol	<<locked>>	62%	25469	75%	**70	90%
Somchem MP200	<<locked>>	61%	17042	50%	**73	95%
Somchem MS200	<<locked>>	61%	15447	45%	**17	96%
[Somchem S221]*	<<locked>>	66%	21060	62%	**94	81%
[Vihtavuori 3N37]*	<<locked>>	60%	12154	36%	**8	83%
Vihtavuori N320	<<locked>>	60%	17056	50%	**33	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	10240	30%	**7	100%
Vihtavuori N330	<<locked>>	61%	15156	44%	**40	100%
Vihtavuori N340	<<locked>>	62%	14808	43%	**10	94%
[Vihtavuori N350]*	<<locked>>	60%	11182	33%	**2	81%
Winchester 231	<<locked>>	62%	24366	71%	**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.

<<locked>>... you need to buy an access license to unlock the data