Load data for .45 Win. Mag. + .452 | 180gr | Rim Rock RNFP Cowboy

Recommended Powder(s): Alliant BULLSEYE, Alliant UNIQUE, ReloadSwiss RS 20, Somchem MS200, Vihtavuori 3N37

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.452 \| 180gr \| Rim Rock RNFP Cowboy
Manufacturer SKU:	#028
Bullet Weight:	180gr \| 11.7g
Bullet Diameter:	0.452" \| 11.48mm
Bullet Length:	0.501" \| 12.7mm
Caliber:	.45 Win. Mag. load data
Case Length (l3):	1.198" \| 30.4mm
Cartridge Length (C.O.L.):	1.284" \| 32.6mm
Seated Depth:	0.415" \| 10.6mm
Shank Seated Depth:	0.415" \| 10.6mm
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_B10653_C740
Last updated:	2025-01-01

Load data for 114 loads in caliber .45 Win. Mag. with .452 | 180gr | Rim Rock RNFP Cowboy bullet and 57 powders such as Alliant BULLSEYE, Alliant UNIQUE, ReloadSwiss RS 20, Somchem MS200, Vihtavuori 3N37. 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".

Go to the bottom of the "Dashboard " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
We recommend you limit powder range to relevant brands to speed up re-calculation of results
Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

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>>	95%	24192	61%	**99	87%
ADI AP 70N	<<locked>>	77%	34838	87%	**14	100%
ADI APS 350	<<locked>>	81%	35897	90%	**14	100%
ADI APS 450	<<locked>>	82%	34824	87%	**40	100%
ADI AS 30	<<locked>>	86%	34983	88%	**99	100%
ADI AS 50N	<<locked>>	83%	35186	88%	**52	100%
Accurate No. 2	<<locked>>	82%	34243	86%	**04	100%
Accurate No. 5	<<locked>>	69%	34693	87%	**96	95%
[Accurate No. 7]*	<<locked>>	89%	35636	89%	**42	83%
Accurate Solo 1000	<<locked>>	84%	34911	88%	**22	100%
Accurate Solo 1250	<<locked>>	90%	33692	84%	**81	100%
Alliant BULLSEYE 👍	<<locked>>	80%	34519	87%	**60	100%
Alliant POWER PISTOL	<<locked>>	93%	35694	89%	**58	93%
Alliant UNIQUE 👍	<<locked>>	93%	35288	88%	**80	100%
Baschieri & Pellagri 100	<<locked>>	85%	33591	84%	**19	100%
Hodgdon Clays	<<locked>>	78%	33968	85%	**07	100%
Hodgdon HP38	<<locked>>	63%	34084	85%	**65	100%
Hodgdon HS-6	<<locked>>	75%	34940	88%	**83	97%
Hodgdon Longshot	<<locked>>	72%	35331	89%	**86	98%
Hodgdon Universal	<<locked>>	84%	33881	85%	**98	100%
Hodgdon TrailBoss	<<locked>>	94%	10501	26%	**9	100%
Lovex D036	<<locked>>	69%	34635	87%	**93	95%
[Lovex D037.1]*	<<locked>>	89%	35636	89%	**42	83%
Lovex S011	<<locked>>	72%	33692	84%	**39	100%
Lovex S020	<<locked>>	84%	35810	90%	**37	100%
Maxam CSB 1	<<locked>>	96%	35578	89%	**94	100%
Maxam CSB 2	<<locked>>	92%	34418	86%	**01	100%
Maxam CSB 3	<<locked>>	88%	33924	85%	**55	100%
Maxam CSB 4	<<locked>>	84%	33678	84%	**25	100%
Maxam CSB 5	<<locked>>	79%	33605	84%	**76	100%
Ramshot Silhouette	<<locked>>	75%	34476	86%	**57	100%
Ramshot True Blue	<<locked>>	70%	34142	86%	**57	98%
Ramshot Zip	<<locked>>	65%	34838	87%	**81	100%
ReloadSwiss RS 12	<<locked>>	80%	34693	87%	**91	100%
ReloadSwiss RS 14	<<locked>>	94%	9398	24%	**3	98%
ReloadSwiss RS 20 👍	<<locked>>	94%	34403	86%	**70	100%
[ReloadSwiss RS 24]*	<<locked>>	94%	34432	86%	**19	86%
Rottweil P 801	<<locked>>	74%	34809	87%	**48	100%
Rottweil P 806	<<locked>>	96%	26716	67%	**67	95%
SNPE Vectan A0	<<locked>>	95%	35534	89%	**17	100%
SNPE Vectan BA 9	<<locked>>	84%	34519	87%	**81	100%
SNPE Vectan BA10	<<locked>>	75%	33779	85%	**30	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	31198	78%	**04	96%
SNPE Vectan BA9 1/2	<<locked>>	86%	33939	85%	**88	100%
Shooters World Auto Pistol	<<locked>>	69%	34635	87%	**93	95%
[Shooters World Major Pistol]*	<<locked>>	89%	35636	89%	**42	83%
Somchem MP200	<<locked>>	85%	35056	88%	**57	100%
Somchem MS200 👍	<<locked>>	90%	34998	88%	**37	100%
Somchem S221	<<locked>>	80%	34751	87%	**06	90%
Vihtavuori 3N37 👍	<<locked>>	94%	35607	89%	**99	99%
Vihtavuori N310	<<locked>>	69%	35694	90%	**63	100%
Vihtavuori N320	<<locked>>	82%	33663	84%	**42	100%
Vihtavuori N32C Tin Star	<<locked>>	97%	25121	63%	**58	100%
Vihtavuori N330	<<locked>>	87%	35621	89%	**30	100%
Vihtavuori N340	<<locked>>	89%	34142	86%	**30	100%
Vihtavuori N350	<<locked>>	96%	33605	84%	**70	98%
Winchester 231	<<locked>>	71%	33678	84%	**68	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	81%	17085	43%	**38	81%
ADI AP 70N	<<locked>>	61%	22147	56%	**24	100%
ADI APS 350	<<locked>>	61%	22655	57%	**43	100%
ADI APS 450	<<locked>>	61%	20929	52%	**47	100%
ADI AS 30	<<locked>>	61%	19319	48%	**70	100%
ADI AS 50N	<<locked>>	61%	20189	51%	**22	100%
Accurate No. 2	<<locked>>	61%	17506	44%	**06	93%
Accurate No. 5	<<locked>>	61%	26339	66%	**48	91%
[Accurate No. 7]*	<<locked>>	84%	30560	77%	**60	80%
Accurate Solo 1000	<<locked>>	61%	19522	49%	**96	100%
Accurate Solo 1250	<<locked>>	61%	15214	38%	**50	99%
Alliant BULLSEYE	<<locked>>	61%	20247	51%	**04	98%
[Alliant POWER PISTOL]*	<<locked>>	69%	17883	45%	**88	80%
Alliant UNIQUE	<<locked>>	61%	15287	38%	**86	94%
Baschieri & Pellagri 100	<<locked>>	61%	17492	44%	**70	100%
Hodgdon Clays	<<locked>>	61%	22931	57%	**56	100%
Hodgdon HP38	<<locked>>	61%	32082	80%	**39	100%
Hodgdon HS-6	<<locked>>	61%	21190	53%	**37	90%
Hodgdon Longshot	<<locked>>	61%	24149	61%	**96	94%
Hodgdon Universal	<<locked>>	62%	18536	46%	**45	100%
Hodgdon TrailBoss	<<locked>>	61%	5381	13%	**9	95%
Lovex D036	<<locked>>	61%	26295	66%	**48	91%
[Lovex D037.1]*	<<locked>>	84%	30560	77%	**60	80%
Lovex S011	<<locked>>	61%	23830	60%	**98	100%
Lovex S020	<<locked>>	61%	17637	44%	**35	98%
Maxam CSB 1	<<locked>>	61%	14678	37%	**30	98%
Maxam CSB 2	<<locked>>	61%	14344	36%	**63	100%
Maxam CSB 3	<<locked>>	60%	16694	42%	**66	100%
Maxam CSB 4	<<locked>>	62%	18913	47%	**99	100%
Maxam CSB 5	<<locked>>	61%	21379	54%	**99	100%
Ramshot Silhouette	<<locked>>	61%	21567	54%	**37	97%
Ramshot True Blue	<<locked>>	61%	24569	62%	**02	94%
Ramshot Zip	<<locked>>	61%	30879	77%	**29	100%
ReloadSwiss RS 12	<<locked>>	61%	19827	50%	**68	100%
ReloadSwiss RS 14	<<locked>>	67%	5569	14%	**2	91%
ReloadSwiss RS 20	<<locked>>	61%	13445	34%	**53	95%
[ReloadSwiss RS 24]*	<<locked>>	85%	26658	67%	**75	81%
Rottweil P 801	<<locked>>	61%	23235	58%	**91	100%
[Rottweil P 806]*	<<locked>>	75%	13068	33%	**25	81%
SNPE Vectan A0	<<locked>>	60%	14446	36%	**24	93%
SNPE Vectan BA 9	<<locked>>	62%	18362	46%	**12	99%
SNPE Vectan BA10	<<locked>>	61%	23569	59%	**96	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	61%	12154	30%	**4	80%
SNPE Vectan BA9 1/2	<<locked>>	61%	17361	44%	**06	99%
Shooters World Auto Pistol	<<locked>>	61%	26295	66%	**48	91%
[Shooters World Major Pistol]*	<<locked>>	84%	30560	77%	**60	80%
Somchem MP200	<<locked>>	61%	17912	45%	**45	95%
Somchem MS200	<<locked>>	60%	16186	41%	**83	96%
[Somchem S221]*	<<locked>>	64%	20798	52%	**40	80%
[Vihtavuori 3N37]*	<<locked>>	61%	13227	33%	**43	84%
Vihtavuori N310	<<locked>>	61%	28253	71%	**75	100%
Vihtavuori N320	<<locked>>	61%	18144	45%	**06	100%
Vihtavuori N32C Tin Star	<<locked>>	62%	10559	26%	**6	100%
Vihtavuori N330	<<locked>>	61%	15969	40%	**02	100%
Vihtavuori N340	<<locked>>	61%	15026	38%	**63	94%
[Vihtavuori N350]*	<<locked>>	61%	11966	30%	**4	82%
Winchester 231	<<locked>>	61%	24468	61%	**30	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