Load data for .400 Cor-Bon + .401 | 180gr | Rim Rock RNFP Cowboy

Recommended Powder(s): Hodgdon HS-6

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.401 \| 180gr \| Rim Rock RNFP Cowboy
Manufacturer SKU:	#016
Bullet Weight:	180gr \| 11.7g
Bullet Diameter:	0.401" \| 10.19mm
Bullet Length:	0.603" \| 15.3mm
Caliber:	.400 Cor-Bon load data
Case Length (l3):	0.899" \| 22.8mm
Cartridge Length (C.O.L.):	1.256" \| 31.9mm
Seated Depth:	0.246" \| 6.3mm
Shank Seated Depth:	0.246" \| 6.3mm
Case Capacity:	25.5 Grains of Water \| 1.65 cm³
Primer Size:	Large Pistol (LP)
Max. allowed Pressure:	34954 psi \| 2410 bar
LID:	LID_B10578_C649
Last updated:	2025-12-26

Load data for 108 loads in caliber .400 Cor-Bon with .401 | 180gr | Rim Rock RNFP Cowboy bullet and 54 powders such as Hodgdon HS-6. 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%	31111	89%	**93	96%
ADI AP 70N	<<locked>>	65%	30748	88%	**01	100%
ADI APS 350	<<locked>>	70%	31270	89%	**27	100%
ADI APS 450	<<locked>>	71%	30864	88%	**56	100%
ADI AS 30	<<locked>>	74%	31053	89%	**02	100%
ADI AS 50N	<<locked>>	70%	30632	88%	**38	100%
Accurate No. 2	<<locked>>	73%	31343	90%	**20	100%
[Accurate No. 7]*	<<locked>>	77%	30487	87%	**32	87%
Accurate Solo 1000	<<locked>>	72%	30429	87%	**22	100%
Accurate Solo 1250	<<locked>>	78%	30255	87%	**78	100%
[Accurate TCM]*	<<locked>>	86%	31198	89%	**22	82%
[Alliant BLUE DOT]*	<<locked>>	97%	29530	84%	**02	85%
Alliant BULLSEYE	<<locked>>	69%	30719	88%	**43	100%
Alliant POWER PISTOL	<<locked>>	80%	31430	90%	**48	96%
Alliant Sport Pistol	<<locked>>	64%	30763	88%	**47	100%
Alliant UNIQUE	<<locked>>	80%	31038	89%	**60	100%
Baschieri & Pellagri 100	<<locked>>	75%	31198	89%	**38	100%
Hodgdon Clays	<<locked>>	68%	30226	86%	**27	100%
Hodgdon HS-6 👍	<<locked>>	65%	30995	89%	**80	99%
Hodgdon Universal	<<locked>>	72%	30748	88%	**01	100%
Hodgdon CFE Pistol	<<locked>>	75%	31372	90%	**04	100%
Hodgdon TrailBoss	<<locked>>	96%	13445	38%	**0	100%
[Lovex D037.1]*	<<locked>>	77%	30487	87%	**32	87%
Lovex S020	<<locked>>	72%	31299	90%	**24	100%
Maxam CSB 1	<<locked>>	82%	30835	88%	**84	100%
Maxam CSB 2	<<locked>>	80%	31314	90%	**98	100%
Maxam CSB 3	<<locked>>	76%	30472	87%	**52	100%
Maxam CSB 4	<<locked>>	72%	30081	86%	**32	100%
Maxam CSB 5	<<locked>>	68%	30385	87%	**86	100%
Ramshot Silhouette	<<locked>>	66%	30922	88%	**57	100%
ReloadSwiss RS 12	<<locked>>	68%	30676	88%	**71	100%
ReloadSwiss RS 14	<<locked>>	97%	12299	35%	**3	100%
ReloadSwiss RS 20	<<locked>>	81%	30414	87%	**50	100%
ReloadSwiss RS 24	<<locked>>	83%	30951	89%	**22	90%
Rottweil P 801	<<locked>>	64%	31053	89%	**42	100%
Rottweil P 806	<<locked>>	89%	30589	88%	**71	99%
SNPE Vectan A0	<<locked>>	82%	30922	88%	**14	100%
SNPE Vectan BA 9	<<locked>>	74%	31299	90%	**91	100%
SNPE Vectan BA10	<<locked>>	66%	30850	88%	**56	100%
SNPE Vectan BA7 1/2	<<locked>>	87%	30545	87%	**57	99%
SNPE Vectan BA9 1/2	<<locked>>	75%	30995	89%	**94	100%
SNPE Vectan SP 2	<<locked>>	76%	30516	87%	**42	97%
[Shooters World Major Pistol]*	<<locked>>	77%	30487	87%	**32	87%
Somchem MP200	<<locked>>	74%	31459	90%	**57	100%
Somchem MS200	<<locked>>	77%	30864	88%	**20	100%
Somchem S221	<<locked>>	69%	30792	88%	**02	93%
Vihtavuori 3N37	<<locked>>	81%	31183	89%	**86	100%
Vihtavuori 3N38	<<locked>>	94%	31024	89%	**19	91%
Vihtavuori N105	<<locked>>	96%	24685	71%	**76	91%
Vihtavuori N320	<<locked>>	71%	30603	88%	**42	100%
Vihtavuori N32C Tin Star	<<locked>>	95%	29472	84%	**63	100%
Vihtavuori N330	<<locked>>	74%	30893	88%	**07	100%
Vihtavuori N340	<<locked>>	77%	30429	87%	**20	100%
Vihtavuori N350	<<locked>>	84%	30313	87%	**76	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	62%	12314	35%	**9	80%
ADI AP 70N	<<locked>>	61%	27267	78%	**55	100%
ADI APS 350	<<locked>>	62%	25759	74%	**1	100%
ADI APS 450	<<locked>>	60%	23554	67%	**5	100%
ADI AS 30	<<locked>>	61%	22379	64%	**8	100%
ADI AS 50N	<<locked>>	60%	23583	67%	**43	100%
Accurate No. 2	<<locked>>	62%	21712	62%	**76	99%
[Accurate No. 7]*	<<locked>>	67%	21292	61%	**71	80%
Accurate Solo 1000	<<locked>>	62%	23221	66%	**24	100%
Accurate Solo 1250	<<locked>>	60%	18391	53%	**7	100%
[Accurate TCM]*	<<locked>>	83%	28326	81%	**80	80%
[Alliant BLUE DOT]*	<<locked>>	88%	23134	66%	**88	80%
Alliant BULLSEYE	<<locked>>	62%	24918	71%	**55	100%
[Alliant POWER PISTOL]*	<<locked>>	61%	17709	51%	**73	86%
Alliant Sport Pistol	<<locked>>	60%	27325	78%	**98	100%
Alliant UNIQUE	<<locked>>	60%	18217	52%	**40	99%
Baschieri & Pellagri 100	<<locked>>	60%	20827	60%	**01	100%
Hodgdon Clays	<<locked>>	62%	26208	75%	**8	100%
Hodgdon HS-6	<<locked>>	61%	26005	74%	**04	97%
Hodgdon Universal	<<locked>>	61%	22046	63%	**73	100%
Hodgdon CFE Pistol	<<locked>>	62%	21205	61%	**60	100%
Hodgdon TrailBoss	<<locked>>	65%	7150	20%	**9	100%
[Lovex D037.1]*	<<locked>>	67%	21292	61%	**71	80%
Lovex S020	<<locked>>	61%	22118	63%	**93	100%
Maxam CSB 1	<<locked>>	61%	17579	50%	**8	100%
Maxam CSB 2	<<locked>>	61%	18318	52%	**10	100%
Maxam CSB 3	<<locked>>	61%	20450	59%	**14	100%
Maxam CSB 4	<<locked>>	61%	21886	63%	**14	100%
Maxam CSB 5	<<locked>>	61%	25338	73%	**20	100%
Ramshot Silhouette	<<locked>>	61%	26847	77%	**98	100%
ReloadSwiss RS 12	<<locked>>	61%	24932	71%	**99	100%
ReloadSwiss RS 14	<<locked>>	66%	6831	20%	**3	98%
ReloadSwiss RS 20	<<locked>>	61%	16694	48%	**24	100%
[ReloadSwiss RS 24]*	<<locked>>	67%	18710	54%	**89	80%
Rottweil P 801	<<locked>>	61%	28601	82%	**12	100%
[Rottweil P 806]*	<<locked>>	61%	10907	31%	**5	84%
SNPE Vectan A0	<<locked>>	61%	17593	50%	**1	99%
SNPE Vectan BA 9	<<locked>>	62%	21959	63%	**56	100%
SNPE Vectan BA10	<<locked>>	61%	27064	77%	**10	100%
SNPE Vectan BA7 1/2	<<locked>>	61%	14721	42%	**1	90%
SNPE Vectan BA9 1/2	<<locked>>	62%	21480	61%	**56	100%
[SNPE Vectan SP 2]*	<<locked>>	61%	18304	52%	**15	89%
[Shooters World Major Pistol]*	<<locked>>	67%	21292	61%	**71	80%
Somchem MP200	<<locked>>	61%	21393	61%	**96	100%
Somchem MS200	<<locked>>	61%	19870	57%	**47	100%
[Somchem S221]*	<<locked>>	61%	23061	66%	**71	88%
Vihtavuori 3N37	<<locked>>	62%	16882	48%	**33	94%
[Vihtavuori 3N38]*	<<locked>>	76%	17927	51%	**73	80%
[Vihtavuori N105]*	<<locked>>	79%	14895	43%	**43	80%
Vihtavuori N320	<<locked>>	62%	22945	66%	**47	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	12966	37%	**7	100%
Vihtavuori N330	<<locked>>	61%	20566	59%	**60	100%
Vihtavuori N340	<<locked>>	62%	19058	55%	**40	100%
Vihtavuori N350	<<locked>>	61%	15374	44%	**4	93%

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