Load data for .45 Win. Mag. + .452 | 260gr | Rim Rock TC Cowboy

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.452 \| 260gr \| Rim Rock TC Cowboy
Manufacturer SKU:	#031
Bullet Weight:	260gr \| 16.8g
Bullet Diameter:	0.452" \| 11.48mm
Bullet Length:	<<locked>>
Caliber:	.45 Win. Mag. load data
Case Length (l3):	1.198" \| 30.4mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
Case Capacity:	38.0 Grains of Water \| 2.47 cm³
Primer Size:	Small Pistol Magnum (SPM)
Max. allowed Pressure:	39885 psi \| 2750 bar
LID:	LID_B10656_C740
Last updated:	2026-02-04

Load data for 126 loads in caliber .45 Win. Mag. with .452 | 260gr | Rim Rock TC Cowboy bullet and 63 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.

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>>	96%	35099	88%	**63	99%
ADI AP 70N	<<locked>>	67%	35824	90%	**61	100%
ADI APS 350	<<locked>>	73%	35346	89%	**7	100%
ADI APS 450	<<locked>>	75%	35752	90%	**33	100%
ADI AS 30	<<locked>>	76%	35186	88%	**63	100%
ADI AS 50N	<<locked>>	71%	33852	85%	**89	100%
Accurate No. 2	<<locked>>	72%	33794	85%	**58	100%
Accurate No. 7	<<locked>>	76%	34679	87%	**12	92%
[Accurate No. 9]*	<<locked>>	85%	35041	88%	**02	86%
Accurate Solo 1000	<<locked>>	74%	35012	88%	**89	100%
Accurate Solo 1250	<<locked>>	80%	35215	88%	**45	100%
[Accurate TCM]*	<<locked>>	85%	35244	88%	**06	88%
[Alliant 2400]*	<<locked>>	96%	34708	87%	**19	83%
Alliant BE-86	<<locked>>	77%	34490	86%	**29	100%
Alliant BLUE DOT	<<locked>>	97%	33881	85%	**83	90%
Alliant BULLSEYE	<<locked>>	70%	35070	88%	**01	100%
Alliant Herco 👍	<<locked>>	96%	35882	90%	**17	100%
Alliant POWER PISTOL	<<locked>>	79%	34853	87%	**99	98%
Alliant Sport Pistol	<<locked>>	65%	34403	86%	**01	100%
Alliant UNIQUE	<<locked>>	79%	33823	85%	**98	100%
Baschieri & Pellagri 100	<<locked>>	75%	34534	87%	**86	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	94%	34330	86%	**99	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	71%	34200	86%	**09	100%
Hodgdon Clays	<<locked>>	70%	33620	84%	**1	100%
Hodgdon HS-6	<<locked>>	65%	34679	87%	**40	100%
Hodgdon Universal	<<locked>>	74%	35824	90%	**61	100%
Hodgdon CFE Pistol	<<locked>>	76%	35476	89%	**61	100%
Lovex D037.1	<<locked>>	76%	34679	87%	**12	92%
[Lovex D037.2]*	<<locked>>	84%	35041	88%	**02	86%
Lovex S011	<<locked>>	65%	35331	89%	**15	100%
Lovex S020	<<locked>>	72%	34447	86%	**68	100%
Maxam CSB 1	<<locked>>	83%	35056	88%	**38	100%
Maxam CSB 2	<<locked>>	80%	35244	88%	**42	100%
Maxam CSB 3	<<locked>>	77%	34069	85%	**06	100%
Maxam CSB 4	<<locked>>	74%	34563	87%	**89	100%
Maxam CSB 5	<<locked>>	69%	33968	85%	**40	100%
[Ramshot Enforcer]*	<<locked>>	96%	34040	85%	**19	83%
Ramshot Silhouette	<<locked>>	66%	34766	87%	**11	100%
ReloadSwiss RS 12	<<locked>>	69%	35578	89%	**29	100%
ReloadSwiss RS 20	<<locked>>	81%	34679	87%	**01	100%
ReloadSwiss RS 24	<<locked>>	82%	34954	88%	**96	94%
Rottweil P 801	<<locked>>	65%	35578	89%	**02	100%
Rottweil P 806	<<locked>>	88%	35534	89%	**39	100%
SNPE Vectan A0	<<locked>>	83%	35853	90%	**78	100%
SNPE Vectan BA 9	<<locked>>	74%	34490	86%	**35	100%
SNPE Vectan BA10	<<locked>>	68%	34664	87%	**20	100%
SNPE Vectan BA7 1/2	<<locked>>	87%	34258	86%	**17	100%
SNPE Vectan BA9 1/2	<<locked>>	75%	34258	86%	**42	100%
SNPE Vectan SP 2	<<locked>>	76%	35607	89%	**22	99%
[Shooters World Heavy Pistol]*	<<locked>>	84%	35041	88%	**02	86%
Shooters World Major Pistol	<<locked>>	76%	34679	87%	**12	92%
Somchem MP200	<<locked>>	73%	34185	86%	**98	100%
Somchem MS200	<<locked>>	79%	35781	90%	**88	100%
Somchem S221	<<locked>>	69%	35157	88%	**86	97%
Vihtavuori 3N37 👍	<<locked>>	82%	35621	89%	**53	100%
Vihtavuori 3N38	<<locked>>	93%	34766	87%	**89	95%
Vihtavuori N105	<<locked>>	96%	29617	74%	**70	96%
Vihtavuori N320	<<locked>>	71%	33982	85%	**93	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	32880	82%	**17	100%
Vihtavuori N330	<<locked>>	74%	34722	87%	**55	100%
Vihtavuori N340	<<locked>>	79%	35070	88%	**81	100%
Vihtavuori N350 👍	<<locked>>	84%	35447	89%	**47	100%
Winchester 231	<<locked>>	63%	35128	88%	**35	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	13402	34%	**6	85%
ADI AP 70N	<<locked>>	61%	29892	75%	**99	100%
ADI APS 350	<<locked>>	60%	26731	67%	**2	100%
ADI APS 450	<<locked>>	61%	25773	65%	**2	100%
ADI AS 30	<<locked>>	62%	24947	63%	**5	100%
ADI AS 50N	<<locked>>	61%	26107	65%	**7	100%
Accurate No. 2	<<locked>>	61%	23757	60%	**33	100%
[Accurate No. 7]*	<<locked>>	61%	19798	50%	**63	82%
[Accurate No. 9]*	<<locked>>	76%	26295	66%	**75	81%
Accurate Solo 1000	<<locked>>	61%	25077	63%	**1	100%
Accurate Solo 1250	<<locked>>	60%	20639	52%	**1	100%
[Accurate TCM]*	<<locked>>	74%	24018	60%	**35	80%
[Alliant 2400]*	<<locked>>	91%	30284	76%	**57	80%
Alliant BE-86	<<locked>>	61%	21277	53%	**8	100%
[Alliant BLUE DOT]*	<<locked>>	77%	19783	50%	**43	80%
Alliant BULLSEYE	<<locked>>	61%	27296	68%	**02	100%
Alliant Herco	<<locked>>	61%	15127	38%	**9	99%
Alliant POWER PISTOL	<<locked>>	61%	20088	50%	**53	91%
Alliant Sport Pistol	<<locked>>	61%	30574	77%	**55	100%
Alliant UNIQUE	<<locked>>	61%	20610	52%	**10	100%
Baschieri & Pellagri 100	<<locked>>	60%	23018	58%	**5	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	62%	14997	38%	**6	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	61%	25150	63%	**07	100%
Hodgdon Clays	<<locked>>	60%	27122	68%	**5	100%
Hodgdon HS-6	<<locked>>	61%	29588	74%	**75	99%
Hodgdon Universal	<<locked>>	61%	24729	62%	**30	100%
Hodgdon CFE Pistol	<<locked>>	62%	23467	59%	**10	100%
[Lovex D037.1]*	<<locked>>	61%	19798	50%	**63	82%
[Lovex D037.2]*	<<locked>>	76%	26295	66%	**75	81%
Lovex S011	<<locked>>	61%	30980	78%	**73	100%
Lovex S020	<<locked>>	61%	24801	62%	**50	100%
Maxam CSB 1	<<locked>>	61%	19696	49%	**2	100%
Maxam CSB 2	<<locked>>	61%	20842	52%	**8	100%
Maxam CSB 3	<<locked>>	61%	22960	58%	**4	100%
Maxam CSB 4	<<locked>>	61%	24743	62%	**8	100%
Maxam CSB 5	<<locked>>	61%	27644	69%	**8	100%
[Ramshot Enforcer]*	<<locked>>	92%	29283	73%	**53	81%
Ramshot Silhouette	<<locked>>	61%	29573	74%	**45	100%
ReloadSwiss RS 12	<<locked>>	60%	27543	69%	**43	100%
ReloadSwiss RS 20	<<locked>>	61%	19508	49%	**01	100%
[ReloadSwiss RS 24]*	<<locked>>	61%	17738	44%	**01	82%
Rottweil P 801	<<locked>>	61%	31560	79%	**60	100%
Rottweil P 806	<<locked>>	61%	13373	34%	**1	91%
SNPE Vectan A0	<<locked>>	61%	19682	49%	**8	100%
SNPE Vectan BA 9	<<locked>>	62%	24236	61%	**14	100%
SNPE Vectan BA10	<<locked>>	61%	28601	72%	**1	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	16723	42%	**2	94%
SNPE Vectan BA9 1/2	<<locked>>	61%	23772	60%	**10	100%
SNPE Vectan SP 2	<<locked>>	61%	21509	54%	**99	94%
[Shooters World Heavy Pistol]*	<<locked>>	76%	26295	66%	**75	81%
[Shooters World Major Pistol]*	<<locked>>	61%	19798	50%	**63	82%
Somchem MP200	<<locked>>	61%	24178	61%	**66	100%
Somchem MS200	<<locked>>	61%	21915	55%	**10	100%
Somchem S221	<<locked>>	61%	26397	66%	**52	93%
Vihtavuori 3N37	<<locked>>	61%	18913	47%	**04	97%
[Vihtavuori 3N38]*	<<locked>>	67%	15519	39%	**1	81%
[Vihtavuori N105]*	<<locked>>	70%	13227	33%	**5	81%
Vihtavuori N320	<<locked>>	62%	25657	64%	**7	100%
Vihtavuori N32C Tin Star	<<locked>>	67%	17114	43%	**3	100%
Vihtavuori N330	<<locked>>	61%	23279	58%	**20	100%
Vihtavuori N340	<<locked>>	61%	21147	53%	**01	100%
Vihtavuori N350	<<locked>>	61%	17042	43%	**5	96%
Winchester 231	<<locked>>	61%	33054	83%	**12	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