Load data for .38-45 ACP + .358 | 125gr | Rim Rock TC Cowboy

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.358 \| 125gr \| Rim Rock TC Cowboy
Manufacturer SKU:	#012
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.358" \| 9.09mm
Bullet Length:	0.541" \| 13.7mm
Caliber:	.38-45 ACP load data
Case Length (l3):	0.898" \| 22.8mm
Cartridge Length (C.O.L.):	1.229" \| 31.2mm
Seated Depth:	0.210" \| 5.3mm
Shank Seated Depth:	0.210" \| 5.3mm
Case Capacity:	22.0 Grains of Water \| 1.43 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	34084 psi \| 2350 bar
LID:	LID_B10538_C596
Last updated:	2026-01-20

Load data for 106 loads in caliber .38-45 ACP with .358 | 125gr | Rim Rock TC Cowboy bullet and 53 powder(s). 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.

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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>>	93%	29805	87%	**21	95%
ADI AP 70N	<<locked>>	63%	29834	88%	**32	100%
ADI APS 350	<<locked>>	67%	30023	88%	**42	100%
ADI APS 450	<<locked>>	69%	30168	88%	**78	100%
ADI AS 30	<<locked>>	72%	30516	90%	**27	100%
ADI AS 50N	<<locked>>	69%	30385	89%	**73	100%
Accurate No. 2	<<locked>>	71%	30356	89%	**48	100%
[Accurate No. 7]*	<<locked>>	75%	30589	90%	**86	86%
Accurate Solo 1000	<<locked>>	71%	29965	88%	**53	100%
Accurate Solo 1250	<<locked>>	77%	30603	90%	**25	100%
[Alliant BLUE DOT]*	<<locked>>	96%	30269	89%	**60	85%
Alliant BULLSEYE	<<locked>>	67%	29675	87%	**78	100%
Alliant POWER PISTOL	<<locked>>	77%	30023	88%	**63	94%
Alliant UNIQUE	<<locked>>	76%	29544	87%	**85	100%
Baschieri & Pellagri 100	<<locked>>	72%	30037	88%	**57	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	91%	29530	87%	**76	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	69%	30385	89%	**89	100%
Hodgdon Clays	<<locked>>	67%	30429	89%	**58	100%
Hodgdon HS-6	<<locked>>	64%	30487	89%	**17	98%
Hodgdon Universal	<<locked>>	70%	29834	88%	**32	100%
Hodgdon CFE Pistol	<<locked>>	72%	29747	87%	**22	100%
Hodgdon TrailBoss	<<locked>>	95%	13706	40%	**5	100%
[Lovex D037.1]*	<<locked>>	75%	30589	90%	**86	86%
Lovex S020	<<locked>>	69%	29341	86%	**42	100%
Maxam CSB 1	<<locked>>	80%	30124	88%	**16	100%
Maxam CSB 2	<<locked>>	76%	29298	86%	**09	100%
Maxam CSB 3	<<locked>>	75%	30545	90%	**96	100%
Maxam CSB 4	<<locked>>	71%	29921	88%	**66	100%
Maxam CSB 5	<<locked>>	67%	29762	87%	**11	100%
Ramshot Silhouette	<<locked>>	64%	29936	88%	**88	100%
ReloadSwiss RS 12	<<locked>>	66%	29805	87%	**99	100%
ReloadSwiss RS 14	<<locked>>	96%	12604	37%	**1	100%
ReloadSwiss RS 20	<<locked>>	79%	30501	89%	**98	100%
[ReloadSwiss RS 24]*	<<locked>>	81%	30298	89%	**60	89%
Rottweil P 806	<<locked>>	87%	30661	90%	**16	99%
SNPE Vectan A0	<<locked>>	78%	29370	86%	**35	100%
SNPE Vectan BA 9	<<locked>>	71%	29617	87%	**09	100%
SNPE Vectan BA10	<<locked>>	65%	30139	88%	**78	100%
SNPE Vectan BA7 1/2	<<locked>>	85%	29994	88%	**88	99%
SNPE Vectan BA9 1/2	<<locked>>	73%	30298	89%	**29	100%
SNPE Vectan SP 2	<<locked>>	74%	30589	90%	**96	96%
[Shooters World Major Pistol]*	<<locked>>	75%	30589	90%	**86	86%
Somchem MP200	<<locked>>	71%	30052	88%	**81	100%
Somchem MS200	<<locked>>	75%	30400	89%	**58	100%
Somchem S221	<<locked>>	67%	30197	89%	**37	92%
Vihtavuori 3N37	<<locked>>	79%	30545	90%	**30	99%
Vihtavuori 3N38	<<locked>>	92%	30647	90%	**63	90%
Vihtavuori N105	<<locked>>	96%	26324	77%	**37	91%
Vihtavuori N320	<<locked>>	70%	30385	89%	**76	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	30008	88%	**98	100%
Vihtavuori N330	<<locked>>	72%	30197	89%	**39	100%
Vihtavuori N340	<<locked>>	76%	30066	88%	**58	100%
Vihtavuori N350	<<locked>>	81%	29588	87%	**04	99%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	63%	13010	38%	**20	80%
ADI AP 70N	<<locked>>	61%	27586	81%	**96	100%
ADI APS 350	<<locked>>	61%	25860	76%	**83	100%
ADI APS 450	<<locked>>	62%	24932	73%	**02	100%
ADI AS 30	<<locked>>	60%	22539	66%	**09	100%
ADI AS 50N	<<locked>>	60%	24120	71%	**81	100%
Accurate No. 2	<<locked>>	61%	21567	63%	**01	99%
[Accurate No. 7]*	<<locked>>	68%	23250	68%	**39	81%
Accurate Solo 1000	<<locked>>	62%	23641	69%	**55	100%
Accurate Solo 1250	<<locked>>	60%	18971	56%	**29	100%
[Alliant BLUE DOT]*	<<locked>>	88%	24134	71%	**42	80%
Alliant BULLSEYE	<<locked>>	61%	24831	73%	**93	100%
[Alliant POWER PISTOL]*	<<locked>>	61%	18028	53%	**94	85%
Alliant UNIQUE	<<locked>>	61%	19043	56%	**81	99%
Baschieri & Pellagri 100	<<locked>>	60%	21321	63%	**29	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	62%	13706	40%	**8	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	23598	69%	**91	100%
Hodgdon Clays	<<locked>>	61%	26121	77%	**96	100%
Hodgdon HS-6	<<locked>>	61%	27427	80%	**65	97%
Hodgdon Universal	<<locked>>	61%	22974	67%	**17	100%
Hodgdon CFE Pistol	<<locked>>	61%	21205	62%	**78	100%
Hodgdon TrailBoss	<<locked>>	92%	12966	38%	**5	100%
[Lovex D037.1]*	<<locked>>	68%	23250	68%	**39	81%
Lovex S020	<<locked>>	61%	22205	65%	**24	100%
Maxam CSB 1	<<locked>>	61%	18115	53%	**06	100%
Maxam CSB 2	<<locked>>	61%	19087	56%	**45	100%
Maxam CSB 3	<<locked>>	61%	20972	62%	**42	100%
Maxam CSB 4	<<locked>>	60%	22307	65%	**48	100%
Maxam CSB 5	<<locked>>	61%	25715	75%	**52	100%
Ramshot Silhouette	<<locked>>	61%	27717	81%	**52	100%
ReloadSwiss RS 12	<<locked>>	61%	25933	76%	**40	100%
ReloadSwiss RS 14	<<locked>>	94%	12009	35%	**2	100%
ReloadSwiss RS 20	<<locked>>	61%	17564	52%	**58	100%
[ReloadSwiss RS 24]*	<<locked>>	67%	19725	58%	**37	80%
[Rottweil P 806]*	<<locked>>	61%	11734	34%	**66	84%
SNPE Vectan A0	<<locked>>	61%	18318	54%	**25	99%
SNPE Vectan BA 9	<<locked>>	61%	22017	65%	**84	100%
SNPE Vectan BA10	<<locked>>	61%	27398	80%	**38	100%
SNPE Vectan BA7 1/2	<<locked>>	62%	15490	45%	**76	90%
SNPE Vectan BA9 1/2	<<locked>>	61%	21248	62%	**75	100%
[SNPE Vectan SP 2]*	<<locked>>	61%	19116	56%	**50	89%
[Shooters World Major Pistol]*	<<locked>>	68%	23250	68%	**39	81%
Somchem MP200	<<locked>>	61%	22597	66%	**43	100%
Somchem MS200	<<locked>>	61%	20668	61%	**88	100%
[Somchem S221]*	<<locked>>	61%	23598	69%	**06	88%
Vihtavuori 3N37	<<locked>>	61%	17361	51%	**58	93%
[Vihtavuori 3N38]*	<<locked>>	75%	18289	54%	**04	80%
[Vihtavuori N105]*	<<locked>>	80%	15795	46%	**84	81%
Vihtavuori N320	<<locked>>	62%	23670	69%	**81	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	13953	41%	**5	100%
Vihtavuori N330	<<locked>>	62%	21654	64%	**04	100%
Vihtavuori N340	<<locked>>	61%	19058	56%	**58	99%
Vihtavuori N350	<<locked>>	61%	15505	45%	**09	92%

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