Load data for .327 Federal Magnum + .313 | 78gr | Rim Rock RN Cowboy

Recommended Powder(s): Alliant UNIQUE, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200, Vihtavuori N340

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.313 \| 78gr \| Rim Rock RN Cowboy
Manufacturer SKU:	#004
Bullet Weight:	78gr \| 5.1g
Bullet Diameter:	0.313" \| 7.95mm
Bullet Length:	0.471" \| 12.0mm
Caliber:	.327 Federal Magnum load data
Case Length (l3):	1.180" \| 30.0mm
Cartridge Length (C.O.L.):	1.320" \| 33.5mm
Seated Depth:	0.331" \| 8.4mm
Shank Seated Depth:	0.331" \| 8.4mm
Case Capacity:	19.0 Grains of Water \| 1.23 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B10501_C435
Last updated:	2025-01-01

Load data for 118 loads in caliber .327 Federal Magnum with .313 | 78gr | Rim Rock RN Cowboy bullet and 59 powders such as Alliant UNIQUE, ReloadSwiss RS 20, SNPE Vectan A0, Somchem MS200, Vihtavuori N340. 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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Min z (%)
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Barrel Length (cm)
Safety Buffer (%)
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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.

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%	28340	63%	**16	91%
ADI AP 70N	<<locked>>	77%	38754	86%	**01	100%
ADI APS 350	<<locked>>	84%	39856	89%	**91	100%
ADI APS 450	<<locked>>	84%	39059	87%	**17	100%
ADI AS 30	<<locked>>	88%	39334	87%	**83	100%
ADI AS 50N	<<locked>>	85%	40335	90%	**55	100%
Accurate No. 2	<<locked>>	84%	40408	90%	**21	100%
Accurate No. 5	<<locked>>	70%	39972	89%	**26	97%
[Accurate No. 7]*	<<locked>>	86%	38928	87%	**45	86%
Accurate Solo 1000	<<locked>>	86%	39798	89%	**22	100%
Accurate Solo 1250	<<locked>>	91%	38798	86%	**75	100%
Alliant BULLSEYE	<<locked>>	80%	38609	86%	**54	100%
Alliant POWER PISTOL	<<locked>>	92%	40016	89%	**78	95%
Alliant UNIQUE 👍	<<locked>>	93%	39160	87%	**77	100%
Baschieri & Pellagri 100	<<locked>>	87%	39131	87%	**19	100%
Hodgdon Clays	<<locked>>	81%	38406	85%	**94	100%
Hodgdon HP38	<<locked>>	65%	39827	89%	**75	100%
Hodgdon HS-6	<<locked>>	75%	39842	89%	**93	99%
Hodgdon Longshot	<<locked>>	71%	38754	86%	**73	99%
Hodgdon Universal	<<locked>>	85%	38754	86%	**01	100%
Hodgdon TrailBoss	<<locked>>	95%	11966	27%	**01	100%
Lovex D036	<<locked>>	70%	39914	89%	**22	97%
[Lovex D037.1]*	<<locked>>	86%	38928	87%	**45	86%
Lovex S011	<<locked>>	75%	39595	88%	**49	100%
Lovex S020	<<locked>>	84%	40350	90%	**37	100%
Maxam CSB 1	<<locked>>	97%	39798	89%	**91	100%
Maxam CSB 2	<<locked>>	92%	38754	86%	**81	100%
Maxam CSB 3	<<locked>>	90%	39305	87%	**55	100%
Maxam CSB 4	<<locked>>	87%	39595	88%	**35	100%
Maxam CSB 5	<<locked>>	81%	38566	86%	**67	100%
Ramshot Silhouette	<<locked>>	77%	40016	89%	**77	100%
Ramshot True Blue	<<locked>>	71%	39653	88%	**80	99%
Ramshot Zip	<<locked>>	66%	40437	90%	**85	100%
ReloadSwiss RS 12	<<locked>>	80%	38392	85%	**62	100%
ReloadSwiss RS 14	<<locked>>	97%	11110	25%	**01	100%
ReloadSwiss RS 20 👍	<<locked>>	93%	38276	85%	**60	100%
ReloadSwiss RS 24	<<locked>>	95%	40379	90%	**65	90%
Rottweil P 801	<<locked>>	76%	40176	89%	**45	100%
Rottweil P 806	<<locked>>	96%	33344	74%	**96	98%
SNPE Vectan A0 👍	<<locked>>	95%	39726	88%	**21	100%
SNPE Vectan BA 9	<<locked>>	86%	39798	89%	**81	100%
SNPE Vectan BA10	<<locked>>	78%	39044	87%	**17	100%
SNPE Vectan BA7 1/2	<<locked>>	96%	35389	79%	**04	98%
SNPE Vectan BA9 1/2	<<locked>>	89%	40350	90%	**08	100%
Shooters World Auto Pistol	<<locked>>	70%	39914	89%	**22	97%
[Shooters World Major Pistol]*	<<locked>>	86%	38928	87%	**45	86%
Somchem MP200	<<locked>>	85%	39378	88%	**60	100%
Somchem MS200 👍	<<locked>>	90%	38899	87%	**24	100%
Somchem S221	<<locked>>	79%	39175	87%	**22	93%
Vihtavuori 3N37	<<locked>>	93%	39334	87%	**03	100%
[Vihtavuori 3N38]*	<<locked>>	96%	29283	65%	**52	85%
[Vihtavuori N105]*	<<locked>>	97%	22597	50%	**73	84%
Vihtavuori N310	<<locked>>	71%	40379	90%	**44	100%
Vihtavuori N320	<<locked>>	84%	39030	87%	**35	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	27470	61%	**99	100%
Vihtavuori N330	<<locked>>	86%	38638	86%	**01	100%
Vihtavuori N340 👍	<<locked>>	90%	39494	88%	**40	100%
Vihtavuori N350	<<locked>>	97%	39624	88%	**93	100%
Winchester 231	<<locked>>	74%	40437	90%	**85	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	75%	16462	37%	**24	80%
ADI AP 70N	<<locked>>	62%	25237	56%	**88	100%
ADI APS 350	<<locked>>	61%	24091	54%	**71	100%
ADI APS 450	<<locked>>	61%	22829	51%	**84	100%
ADI AS 30	<<locked>>	62%	21364	48%	**17	100%
ADI AS 50N	<<locked>>	62%	22655	50%	**80	100%
Accurate No. 2	<<locked>>	60%	18884	42%	**53	95%
Accurate No. 5	<<locked>>	61%	28863	64%	**32	93%
[Accurate No. 7]*	<<locked>>	78%	28500	63%	**58	80%
Accurate Solo 1000	<<locked>>	60%	20581	46%	**24	100%
Accurate Solo 1250	<<locked>>	60%	16650	37%	**84	100%
Alliant BULLSEYE	<<locked>>	60%	21988	49%	**55	99%
[Alliant POWER PISTOL]*	<<locked>>	64%	17448	39%	**80	80%
Alliant UNIQUE	<<locked>>	62%	17303	38%	**47	96%
Baschieri & Pellagri 100	<<locked>>	60%	19014	42%	**04	100%
Hodgdon Clays	<<locked>>	61%	24584	55%	**94	100%
Hodgdon HP38	<<locked>>	60%	34316	76%	**96	100%
Hodgdon HS-6	<<locked>>	61%	23714	53%	**04	92%
Hodgdon Longshot	<<locked>>	61%	26701	59%	**76	96%
Hodgdon Universal	<<locked>>	60%	19682	44%	**73	100%
[Hodgdon TrailBoss]²	<<locked>>	59%	5714	13%	**8	96%
Lovex D036	<<locked>>	61%	28819	64%	**29	93%
[Lovex D037.1]*	<<locked>>	78%	28500	63%	**58	80%
Lovex S011	<<locked>>	61%	26266	58%	**62	100%
Lovex S020	<<locked>>	61%	19769	44%	**89	99%
Maxam CSB 1	<<locked>>	61%	15925	35%	**61	99%
Maxam CSB 2	<<locked>>	61%	16621	37%	**07	100%
Maxam CSB 3	<<locked>>	60%	18231	41%	**07	100%
Maxam CSB 4	<<locked>>	61%	20595	46%	**37	100%
Maxam CSB 5	<<locked>>	61%	23511	52%	**43	100%
Ramshot Silhouette	<<locked>>	61%	24540	55%	**14	98%
Ramshot True Blue	<<locked>>	62%	28514	63%	**06	97%
Ramshot Zip	<<locked>>	62%	34766	77%	**16	100%
ReloadSwiss RS 12	<<locked>>	62%	22814	51%	**25	100%
ReloadSwiss RS 14	<<locked>>	62%	5642	13%	**1	91%
ReloadSwiss RS 20	<<locked>>	62%	15287	34%	**07	97%
[ReloadSwiss RS 24]*	<<locked>>	79%	24671	55%	**67	80%
Rottweil P 801	<<locked>>	61%	25860	58%	**42	100%
[Rottweil P 806]*	<<locked>>	69%	12792	28%	**07	81%
SNPE Vectan A0	<<locked>>	60%	15940	35%	**65	95%
SNPE Vectan BA 9	<<locked>>	61%	20131	45%	**63	100%
SNPE Vectan BA10	<<locked>>	62%	26063	58%	**40	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	62%	13750	31%	**15	83%
SNPE Vectan BA9 1/2	<<locked>>	62%	19682	44%	**60	100%
Shooters World Auto Pistol	<<locked>>	61%	28819	64%	**29	93%
[Shooters World Major Pistol]*	<<locked>>	78%	28500	63%	**58	80%
Somchem MP200	<<locked>>	62%	19986	44%	**09	97%
Somchem MS200	<<locked>>	61%	18202	40%	**40	98%
[Somchem S221]*	<<locked>>	61%	21103	47%	**55	81%
[Vihtavuori 3N37]*	<<locked>>	60%	14562	32%	**81	86%
[Vihtavuori 3N38]*	<<locked>>	88%	23148	51%	**27	80%
[Vihtavuori N105]*	<<locked>>	94%	20363	45%	**11	81%
Vihtavuori N310	<<locked>>	62%	31401	70%	**32	100%
Vihtavuori N320	<<locked>>	61%	20740	46%	**57	100%
Vihtavuori N32C Tin Star	<<locked>>	61%	11850	26%	**1	100%
Vihtavuori N330	<<locked>>	61%	18492	41%	**70	100%
Vihtavuori N340	<<locked>>	60%	16491	37%	**07	96%
[Vihtavuori N350]*	<<locked>>	60%	13285	30%	**35	85%
Winchester 231	<<locked>>	62%	27992	62%	**07	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.