Load data for .45 Win. Mag. + .452 | 200gr | Rim Rock RNFP Cowboy

Recommended Powder(s): Vihtavuori 3N37, Vihtavuori N350

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.452 \| 200gr \| Rim Rock RNFP Cowboy
Manufacturer SKU:	#029
Bullet Weight:	200gr \| 13.0g
Bullet Diameter:	0.452" \| 11.48mm
Bullet Length:	0.539" \| 13.7mm
Caliber:	.45 Win. Mag. load data
Case Length (l3):	1.198" \| 30.4mm
Cartridge Length (C.O.L.):	1.551" \| 39.4mm
Seated Depth:	0.186" \| 4.7mm
Shank Seated Depth:	0.186" \| 4.7mm
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_B10654_C740
Last updated:	2025-01-01

Load data for 110 loads in caliber .45 Win. Mag. with .452 | 200gr | Rim Rock RNFP Cowboy bullet and 55 powders such as Vihtavuori 3N37, Vihtavuori N350. 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>>	95%	34606	87%	**09	97%
ADI AP 70N	<<locked>>	66%	34998	88%	**07	100%
ADI APS 350	<<locked>>	72%	35418	89%	**30	100%
ADI APS 450	<<locked>>	74%	35244	88%	**57	100%
ADI AS 30	<<locked>>	76%	35534	89%	**09	100%
ADI AS 50N	<<locked>>	71%	34447	86%	**45	100%
Accurate No. 2	<<locked>>	73%	35317	89%	**40	100%
Accurate No. 7	<<locked>>	75%	35375	89%	**68	90%
[Accurate No. 9]*	<<locked>>	84%	35491	89%	**62	84%
Accurate Solo 1000	<<locked>>	73%	34490	86%	**25	100%
Accurate Solo 1250	<<locked>>	79%	35099	88%	**91	100%
[Accurate TCM]*	<<locked>>	83%	35172	88%	**52	85%
[Alliant BLUE DOT]*	<<locked>>	96%	34229	86%	**39	88%
Alliant BULLSEYE	<<locked>>	70%	35462	89%	**70	100%
Alliant POWER PISTOL	<<locked>>	79%	35317	89%	**75	97%
Alliant UNIQUE	<<locked>>	78%	34389	86%	**70	100%
Baschieri & Pellagri 100	<<locked>>	75%	35404	89%	**45	100%
Hodgdon Clays	<<locked>>	70%	34418	86%	**24	100%
Hodgdon HS-6	<<locked>>	64%	34577	87%	**90	99%
Hodgdon Universal	<<locked>>	73%	34998	88%	**07	100%
Hodgdon TrailBoss	<<locked>>	96%	15331	38%	**8	100%
Lovex D037.1	<<locked>>	75%	35375	89%	**68	90%
[Lovex D037.2]*	<<locked>>	82%	34795	87%	**55	83%
Lovex S011	<<locked>>	64%	34896	87%	**62	100%
Lovex S020	<<locked>>	72%	35346	89%	**34	100%
Maxam CSB 1	<<locked>>	82%	34708	87%	**85	100%
Maxam CSB 2	<<locked>>	78%	34229	86%	**78	100%
Maxam CSB 3	<<locked>>	76%	34301	86%	**55	100%
Maxam CSB 4	<<locked>>	75%	35520	89%	**55	100%
Maxam CSB 5	<<locked>>	71%	35694	89%	**96	100%
Ramshot Silhouette	<<locked>>	65%	34983	88%	**70	100%
ReloadSwiss RS 12	<<locked>>	67%	34301	86%	**71	100%
ReloadSwiss RS 14	<<locked>>	96%	13967	35%	**8	100%
ReloadSwiss RS 20	<<locked>>	80%	34954	88%	**63	100%
ReloadSwiss RS 24	<<locked>>	81%	34737	87%	**55	92%
Rottweil P 801	<<locked>>	64%	35433	89%	**48	100%
Rottweil P 806	<<locked>>	86%	34867	87%	**88	100%
SNPE Vectan A0	<<locked>>	81%	34766	87%	**21	100%
SNPE Vectan BA 9	<<locked>>	74%	34650	87%	**94	100%
SNPE Vectan BA10	<<locked>>	69%	35230	88%	**57	100%
SNPE Vectan BA7 1/2	<<locked>>	88%	35824	90%	**96	100%
SNPE Vectan BA9 1/2	<<locked>>	75%	34838	87%	**94	100%
[Shooters World Heavy Pistol]*	<<locked>>	82%	34795	87%	**55	83%
Shooters World Major Pistol	<<locked>>	75%	35375	89%	**68	90%
Somchem MP200	<<locked>>	73%	35404	89%	**73	100%
Somchem MS200	<<locked>>	76%	34519	87%	**37	100%
Somchem S221	<<locked>>	68%	35172	88%	**42	95%
Vihtavuori 3N37 👍	<<locked>>	80%	34809	87%	**09	100%
Vihtavuori 3N38	<<locked>>	92%	35056	88%	**52	93%
Vihtavuori N105	<<locked>>	96%	30966	78%	**39	95%
Vihtavuori N320	<<locked>>	72%	35070	88%	**52	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	33373	84%	**53	100%
Vihtavuori N330	<<locked>>	74%	35418	89%	**14	100%
Vihtavuori N340	<<locked>>	78%	35346	89%	**44	100%
Vihtavuori N350 👍	<<locked>>	84%	35679	89%	**09	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	61%	13924	35%	**53	82%
ADI AP 70N	<<locked>>	61%	30429	76%	**52	100%
ADI APS 350	<<locked>>	61%	27296	68%	**19	100%
ADI APS 450	<<locked>>	61%	26005	65%	**35	100%
ADI AS 30	<<locked>>	61%	24555	62%	**55	100%
ADI AS 50N	<<locked>>	61%	26803	67%	**34	100%
Accurate No. 2	<<locked>>	61%	24279	61%	**60	100%
[Accurate No. 7]*	<<locked>>	63%	22263	56%	**19	81%
[Accurate No. 9]*	<<locked>>	79%	29486	74%	**60	80%
Accurate Solo 1000	<<locked>>	61%	25396	64%	**98	100%
Accurate Solo 1250	<<locked>>	61%	21016	53%	**75	100%
[Accurate TCM]*	<<locked>>	76%	27282	68%	**14	80%
[Alliant BLUE DOT]*	<<locked>>	82%	23685	59%	**45	81%
Alliant BULLSEYE	<<locked>>	61%	27978	70%	**58	100%
[Alliant POWER PISTOL]*	<<locked>>	61%	20407	51%	**73	89%
Alliant UNIQUE	<<locked>>	61%	21625	54%	**40	100%
Baschieri & Pellagri 100	<<locked>>	61%	23540	59%	**75	100%
Hodgdon Clays	<<locked>>	61%	27630	69%	**38	100%
Hodgdon HS-6	<<locked>>	61%	30705	77%	**37	99%
Hodgdon Universal	<<locked>>	61%	25048	63%	**60	100%
Hodgdon TrailBoss	<<locked>>	60%	7310	18%	**5	100%
[Lovex D037.1]*	<<locked>>	63%	22263	56%	**19	81%
[Lovex D037.2]*	<<locked>>	78%	30182	76%	**70	80%
Lovex S011	<<locked>>	61%	31415	79%	**16	100%
Lovex S020	<<locked>>	61%	24961	63%	**76	100%
Maxam CSB 1	<<locked>>	61%	20146	51%	**55	100%
Maxam CSB 2	<<locked>>	61%	21654	54%	**94	100%
Maxam CSB 3	<<locked>>	61%	22945	58%	**91	100%
Maxam CSB 4	<<locked>>	61%	24947	63%	**98	100%
Maxam CSB 5	<<locked>>	61%	27427	69%	**88	100%
Ramshot Silhouette	<<locked>>	61%	30835	77%	**11	100%
ReloadSwiss RS 12	<<locked>>	61%	28181	71%	**86	100%
ReloadSwiss RS 14	<<locked>>	61%	6846	17%	**8	98%
ReloadSwiss RS 20	<<locked>>	61%	19508	49%	**07	100%
[ReloadSwiss RS 24]*	<<locked>>	62%	18985	48%	**27	80%
Rottweil P 801	<<locked>>	61%	32401	81%	**06	100%
[Rottweil P 806]*	<<locked>>	61%	14069	35%	**38	88%
SNPE Vectan A0	<<locked>>	61%	19943	50%	**65	100%
SNPE Vectan BA 9	<<locked>>	61%	24279	61%	**34	100%
SNPE Vectan BA10	<<locked>>	61%	28979	73%	**75	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	16694	42%	**22	92%
SNPE Vectan BA9 1/2	<<locked>>	61%	23844	60%	**34	100%
[Shooters World Heavy Pistol]*	<<locked>>	78%	30182	76%	**70	80%
[Shooters World Major Pistol]*	<<locked>>	63%	22263	56%	**19	81%
Somchem MP200	<<locked>>	61%	24947	63%	**96	100%
Somchem MS200	<<locked>>	61%	22626	57%	**40	100%
Somchem S221	<<locked>>	61%	27093	68%	**91	91%
Vihtavuori 3N37	<<locked>>	61%	19638	49%	**20	96%
[Vihtavuori 3N38]*	<<locked>>	69%	17579	44%	**91	80%
[Vihtavuori N105]*	<<locked>>	74%	15316	38%	**71	81%
Vihtavuori N320	<<locked>>	61%	25541	64%	**20	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	14707	37%	**5	100%
Vihtavuori N330	<<locked>>	61%	23496	59%	**43	100%
Vihtavuori N340	<<locked>>	61%	21654	54%	**27	100%
Vihtavuori N350	<<locked>>	61%	17782	45%	**71	95%

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