Load data for .327 Federal Magnum + .313 | 100gr | Rim Rock RNFP Cowboy

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.313 \| 100gr \| Rim Rock RNFP Cowboy
Manufacturer SKU:	#005
Bullet Weight:	100gr \| 6.5g
Bullet Diameter:	0.313" \| 7.95mm
Bullet Length:	<<locked>>
Caliber:	.327 Federal Magnum load data
Case Length (l3):	1.180" \| 30.0mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
Case Capacity:	19.0 Grains of Water \| 1.23 cm³
Primer Size:	Small Pistol (SP)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B10502_C435
Last updated:	2026-02-03

Load data for 130 loads in caliber .327 Federal Magnum with .313 | 100gr | Rim Rock RNFP Cowboy bullet and 65 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>>	97%	23917	53%	**38	88%
ADI AP 70N	<<locked>>	84%	39653	88%	**86	100%
ADI APS 350	<<locked>>	87%	39653	88%	**89	100%
ADI APS 450	<<locked>>	90%	40147	89%	**29	100%
ADI AS 30	<<locked>>	93%	39088	87%	**68	100%
ADI AS 50N	<<locked>>	90%	39610	88%	**20	100%
Accurate No. 2	<<locked>>	88%	38885	86%	**70	100%
Accurate No. 5	<<locked>>	75%	40161	89%	**75	97%
[Accurate No. 7]*	<<locked>>	94%	39769	88%	**07	86%
Accurate Solo 1000	<<locked>>	92%	39813	89%	**04	100%
Accurate Solo 1250	<<locked>>	96%	37159	83%	**40	100%
Alliant BE-86	<<locked>>	97%	39552	88%	**53	100%
Alliant BULLSEYE	<<locked>>	87%	39001	87%	**25	100%
Alliant Herco	<<locked>>	97%	25150	56%	**58	100%
Alliant POWER PISTOL	<<locked>>	96%	36738	82%	**81	94%
Alliant Sport Pistol	<<locked>>	82%	40422	90%	**42	100%
Alliant UNIQUE	<<locked>>	96%	35114	78%	**99	100%
Baschieri & Pellagri 100	<<locked>>	93%	38841	86%	**01	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	96%	25150	56%	**79	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	88%	39349	88%	**34	100%
Hodgdon Clays	<<locked>>	87%	40030	89%	**06	100%
Hodgdon HP38	<<locked>>	70%	40059	89%	**50	100%
Hodgdon HS-6	<<locked>>	81%	39943	89%	**55	98%
Hodgdon Longshot	<<locked>>	78%	40176	89%	**55	99%
Hodgdon TiteGroup	<<locked>>	64%	39697	88%	**91	100%
Hodgdon Universal	<<locked>>	93%	39653	88%	**86	100%
Hodgdon CFE Pistol	<<locked>>	95%	40030	89%	**83	100%
Lovex D032	<<locked>>	62%	39160	87%	**30	100%
Lovex D036	<<locked>>	75%	40103	89%	**75	97%
[Lovex D037.1]*	<<locked>>	94%	39769	88%	**07	86%
Lovex S011	<<locked>>	80%	40016	89%	**30	100%
Lovex S020 👍	<<locked>>	90%	39682	88%	**93	100%
Maxam CSB 1	<<locked>>	97%	34461	77%	**04	100%
Maxam CSB 2	<<locked>>	96%	35317	79%	**37	100%
Maxam CSB 3	<<locked>>	96%	38957	87%	**30	100%
Maxam CSB 4	<<locked>>	92%	39218	87%	**11	100%
Maxam CSB 5	<<locked>>	88%	40132	89%	**75	100%
Ramshot Silhouette 👍	<<locked>>	82%	39349	88%	**32	100%
Ramshot True Blue	<<locked>>	76%	39581	88%	**42	99%
Ramshot Zip	<<locked>>	71%	40219	89%	**57	100%
ReloadSwiss RS 12	<<locked>>	87%	39117	87%	**60	100%
ReloadSwiss RS 20 👍	<<locked>>	97%	34200	76%	**86	100%
[ReloadSwiss RS 24]*	<<locked>>	97%	34272	76%	**29	86%
Rottweil P 801	<<locked>>	82%	40118	89%	**30	100%
Rottweil P 806	<<locked>>	96%	24468	54%	**63	94%
SNPE Vectan A0	<<locked>>	96%	34476	77%	**27	100%
SNPE Vectan BA 9	<<locked>>	92%	39494	88%	**57	100%
SNPE Vectan BA10	<<locked>>	84%	40132	89%	**29	100%
SNPE Vectan BA7 1/2	<<locked>>	97%	30327	67%	**17	96%
SNPE Vectan BA9 1/2	<<locked>>	95%	40451	90%	**76	100%
SNPE Vectan SP 2	<<locked>>	95%	39581	88%	**40	97%
Shooters World Auto Pistol	<<locked>>	75%	40103	89%	**75	97%
Shooters World Clean Shot	<<locked>>	62%	39160	87%	**30	100%
[Shooters World Major Pistol]*	<<locked>>	94%	39769	88%	**07	86%
Somchem MP200 👍	<<locked>>	92%	40132	89%	**29	100%
Somchem MS200 👍	<<locked>>	96%	38551	86%	**93	100%
Somchem S221	<<locked>>	86%	40466	90%	**81	92%
Vihtavuori 3N37	<<locked>>	96%	35012	78%	**09	99%
Vihtavuori N310	<<locked>>	75%	39958	89%	**35	100%
Vihtavuori N320	<<locked>>	91%	39465	88%	**27	100%
Vihtavuori N32C Tin Star	<<locked>>	96%	23453	52%	**8	100%
Vihtavuori N330	<<locked>>	93%	38856	86%	**80	100%
Vihtavuori N340	<<locked>>	96%	38522	86%	**93	100%
Vihtavuori N350	<<locked>>	96%	31821	71%	**66	98%
Winchester 231	<<locked>>	79%	40219	89%	**57	100%

Max Load - Barrel Length: 5.50''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AP 100]*	<<locked>>	82%	16375	36%	**4	81%
ADI AP 70N	<<locked>>	62%	21393	48%	**56	100%
ADI APS 350	<<locked>>	61%	21944	49%	**6	100%
ADI APS 450	<<locked>>	60%	19943	44%	**9	100%
ADI AS 30	<<locked>>	61%	18202	40%	**2	100%
ADI AS 50N	<<locked>>	61%	19203	43%	**5	100%
Accurate No. 2	<<locked>>	60%	16027	36%	**2	93%
Accurate No. 5	<<locked>>	61%	24381	54%	**52	90%
[Accurate No. 7]*	<<locked>>	85%	29138	65%	**70	80%
Accurate Solo 1000	<<locked>>	60%	18217	41%	**2	100%
[Accurate Solo 1250]²	<<locked>>	59%	13793	31%	**9	98%
Alliant BE-86	<<locked>>	60%	14475	32%	**2	100%
Alliant BULLSEYE	<<locked>>	60%	18681	42%	**20	98%
Alliant Herco	<<locked>>	63%	10921	24%	**7	90%
[Alliant POWER PISTOL]*	<<locked>>	68%	16882	38%	**27	80%
Alliant Sport Pistol	<<locked>>	62%	22931	51%	**06	99%
Alliant UNIQUE	<<locked>>	62%	14417	32%	**8	94%
[Baschieri & Pellagri 100]²	<<locked>>	59%	15954	35%	**2	100%
Baschieri & Pellagri 102 Pistol	<<locked>>	66%	11327	25%	**3	100%
Baschieri & Pellagri 103 Pistol	<<locked>>	60%	16795	37%	**5	100%
Hodgdon Clays	<<locked>>	61%	22176	49%	**9	100%
Hodgdon HP38	<<locked>>	60%	29066	65%	**35	100%
Hodgdon HS-6	<<locked>>	61%	20320	45%	**70	90%
Hodgdon Longshot	<<locked>>	60%	21683	48%	**99	93%
Hodgdon TiteGroup	<<locked>>	61%	36477	81%	**65	100%
Hodgdon Universal	<<locked>>	62%	17666	39%	**8	100%
Hodgdon CFE Pistol	<<locked>>	60%	15664	35%	**8	99%
Lovex D032	<<locked>>	60%	35563	79%	**98	100%
Lovex D036	<<locked>>	61%	24352	54%	**48	90%
[Lovex D037.1]*	<<locked>>	85%	29138	65%	**70	80%
Lovex S011	<<locked>>	62%	23583	52%	**43	100%
Lovex S020	<<locked>>	60%	15896	35%	**8	97%
Maxam CSB 1	<<locked>>	60%	13329	30%	**9	98%
Maxam CSB 2	<<locked>>	62%	13851	31%	**5	100%
Maxam CSB 3	<<locked>>	62%	16447	37%	**8	100%
Maxam CSB 4	<<locked>>	63%	18652	41%	**5	100%
Maxam CSB 5	<<locked>>	61%	20668	46%	**1	100%
Ramshot Silhouette	<<locked>>	60%	19986	44%	**53	96%
Ramshot True Blue	<<locked>>	62%	23975	53%	**32	94%
Ramshot Zip	<<locked>>	62%	30313	67%	**55	100%
ReloadSwiss RS 12	<<locked>>	62%	19276	43%	**17	100%
ReloadSwiss RS 20	<<locked>>	62%	13039	29%	**9	95%
[ReloadSwiss RS 24]*	<<locked>>	86%	25106	56%	**88	81%
Rottweil P 801	<<locked>>	60%	21016	47%	**10	100%
[Rottweil P 806]*	<<locked>>	75%	11835	26%	**4	81%
SNPE Vectan A0	<<locked>>	62%	14475	32%	**6	94%
SNPE Vectan BA 9	<<locked>>	60%	16795	37%	**2	99%
SNPE Vectan BA10	<<locked>>	60%	22220	49%	**8	100%
[SNPE Vectan BA7 1/2]*	<<locked>>	61%	11603	26%	**7	80%
SNPE Vectan BA9 1/2	<<locked>>	61%	16694	37%	**5	100%
[SNPE Vectan SP 2]*	<<locked>>	66%	15142	34%	**17	81%
Shooters World Auto Pistol	<<locked>>	61%	24352	54%	**48	90%
Shooters World Clean Shot	<<locked>>	60%	35563	79%	**98	100%
[Shooters World Major Pistol]*	<<locked>>	85%	29138	65%	**70	80%
Somchem MP200	<<locked>>	62%	17622	39%	**7	95%
Somchem MS200	<<locked>>	61%	15374	34%	**5	96%
[Somchem S221]*	<<locked>>	65%	20073	45%	**76	80%
[Vihtavuori 3N37]*	<<locked>>	62%	12865	29%	**2	85%
Vihtavuori N310	<<locked>>	61%	26992	60%	**07	100%
Vihtavuori N320	<<locked>>	60%	17085	38%	**8	100%
Vihtavuori N32C Tin Star	<<locked>>	71%	13010	29%	**3	100%
Vihtavuori N330	<<locked>>	61%	15200	34%	**5	100%
Vihtavuori N340	<<locked>>	60%	13880	31%	**6	94%
[Vihtavuori N350]*	<<locked>>	60%	11153	25%	**0	82%
Winchester 231	<<locked>>	61%	23424	52%	**63	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