Load data for .350 Mag. Rigby + .357 | 125gr | Sierra JHC SportsMaster

Recommended Powder(s): Alliant AR-Comp, Alliant Reloder-10x

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.357 \| 125gr \| Sierra JHC SportsMaster
Manufacturer SKU:	8320
Bullet Weight:	125gr \| 8.1g
Bullet Diameter:	0.357" \| 9.07mm
Bullet Length:	0.534" \| 13.6mm
Caliber:	.350 Mag. Rigby load data
Case Length (l3):	2.750" \| 69.8mm
Cartridge Length (C.O.L.):	3.162" \| 80.3mm
Seated Depth:	0.122" \| 3.1mm
Shank Seated Depth:	0.122" \| 3.1mm
Case Capacity:	91.1 Grains of Water \| 5.92 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	44962 psi \| 3100 bar
LID:	LID_B5944_C501
Last updated:	2025-01-01

Load data for 0 loads in caliber .350 Mag. Rigby with .357 | 125gr | Sierra JHC SportsMaster bullet and 0 powders such as Alliant AR-Comp, Alliant Reloder-10x. 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
Accurate 2015	<<locked>>	87%	40205	89%	**45	98%
[Accurate 2460]*	<<locked>>	86%	40016	89%	**19	93%
Accurate 2495	<<locked>>	93%	40364	90%	**23	98%
[Accurate 2520]*	<<locked>>	91%	40059	89%	**74	94%
Accurate 4064	<<locked>>	97%	38159	85%	**51	95%
Alliant AR-Comp 👍	<<locked>>	91%	40364	90%	**40	100%
Alliant Reloder-10x 👍	<<locked>>	84%	40335	90%	**68	99%
[Hodgdon BL-C2]*	<<locked>>	90%	40059	89%	**81	91%
[Hodgdon Benchmark]*	<<locked>>	87%	40074	89%	**86	93%
Hodgdon H322	<<locked>>	88%	40147	89%	**84	96%
Hodgdon TrailBoss	<<locked>>	96%	30777	68%	**82	100%
IMR 3031	<<locked>>	96%	40016	89%	**30	97%
IMR 4198	<<locked>>	83%	40176	89%	**28	99%
[IMR 8208 XBR]*	<<locked>>	89%	40219	89%	**25	92%
[Lovex D073.4]*	<<locked>>	84%	39871	89%	**12	93%
[Lovex D073.5]*	<<locked>>	86%	40234	89%	**32	93%
[Lovex D073.6]*	<<locked>>	93%	40059	89%	**74	94%
[Lovex S062]*	<<locked>>	95%	40074	89%	**45	92%
[Norma 201]*	<<locked>>	92%	40437	90%	**28	92%
Norma 202	<<locked>>	92%	40089	89%	**68	95%
ReloadSwiss RS 14	<<locked>>	96%	30835	69%	**34	100%
[ReloadSwiss RS 40]*	<<locked>>	85%	40379	90%	**51	94%
Rottweil R 901	<<locked>>	89%	40205	89%	**28	95%
[Rottweil R 902]*	<<locked>>	94%	40263	90%	**28	92%
SNPE Vectan Tubal 3000	<<locked>>	90%	40408	90%	**73	95%
SNPE Vectan Tubal 5000	<<locked>>	97%	40364	90%	**82	96%
[Shooters World Match Rifle]*	<<locked>>	93%	40059	89%	**74	94%
[Shooters World Precision]*	<<locked>>	95%	40074	89%	**45	92%
[Somchem S321]*	<<locked>>	87%	40219	89%	**55	92%
Somchem S335	<<locked>>	90%	39929	89%	**89	96%
Vihtavuori N130	<<locked>>	86%	40045	89%	**89	99%
Vihtavuori N133	<<locked>>	93%	40248	90%	**99	98%
Vihtavuori N135	<<locked>>	97%	34809	77%	**33	96%
Vihtavuori N140	<<locked>>	94%	40393	90%	**48	96%
[Vihtavuori N530]*	<<locked>>	87%	39972	89%	**45	92%
Vihtavuori N540	<<locked>>	94%	40248	90%	**58	95%
[Winchester 748]*	<<locked>>	88%	40234	89%	**84	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
Accurate 2015	<<locked>>	81%	32793	73%	**45	96%
[Accurate 2460]*	<<locked>>	81%	34142	76%	**71	90%
[Accurate 2495]*	<<locked>>	81%	26919	60%	**27	92%
[Accurate 2520]*	<<locked>>	84%	31517	70%	**41	90%
[Accurate 4064]*	<<locked>>	88%	28732	64%	**79	90%
Alliant AR-Comp	<<locked>>	81%	28834	64%	**99	96%
Alliant Reloder-10x	<<locked>>	81%	36085	80%	**63	98%
[Hodgdon BL-C2]*	<<locked>>	88%	36912	82%	**99	90%
[Hodgdon Benchmark]*	<<locked>>	82%	34664	77%	**38	90%
[Hodgdon H322]*	<<locked>>	81%	32184	72%	**48	93%
Hodgdon TrailBoss	<<locked>>	81%	24468	54%	**14	100%
[IMR 3031]*	<<locked>>	83%	26614	59%	**10	90%
IMR 4198	<<locked>>	81%	37739	84%	**69	99%
[IMR 8208 XBR]*	<<locked>>	86%	36782	82%	**36	90%
[Lovex D073.4]*	<<locked>>	81%	35621	79%	**04	91%
[Lovex D073.5]*	<<locked>>	81%	33750	75%	**51	90%
[Lovex D073.6]*	<<locked>>	86%	31517	70%	**41	90%
[Lovex S062]*	<<locked>>	93%	36753	82%	**53	90%
[Norma 201]*	<<locked>>	89%	36666	82%	**33	90%
[Norma 202]*	<<locked>>	83%	29878	66%	**66	90%
ReloadSwiss RS 14	<<locked>>	81%	24250	54%	**51	100%
[ReloadSwiss RS 40]*	<<locked>>	81%	34867	78%	**87	91%
[Rottweil R 901]*	<<locked>>	81%	31676	70%	**89	91%
[Rottweil R 902]*	<<locked>>	91%	36492	81%	**20	90%
[SNPE Vectan Tubal 3000]*	<<locked>>	81%	30501	68%	**97	91%
[SNPE Vectan Tubal 5000]*	<<locked>>	84%	27340	61%	**05	90%
[Shooters World Match Rifle]*	<<locked>>	86%	31517	70%	**41	90%
[Shooters World Precision]*	<<locked>>	93%	36753	82%	**53	90%
[Somchem S321]*	<<locked>>	84%	36071	80%	**33	90%
[Somchem S335]*	<<locked>>	81%	29834	66%	**00	92%
Vihtavuori N130	<<locked>>	81%	33997	76%	**35	97%
[Vihtavuori N133]*	<<locked>>	81%	28123	63%	**58	93%
[Vihtavuori N135]*	<<locked>>	86%	24976	56%	**05	90%
[Vihtavuori N140]*	<<locked>>	84%	28935	64%	**13	90%
[Vihtavuori N530]*	<<locked>>	84%	36245	81%	**43	90%
[Vihtavuori N540]*	<<locked>>	85%	29936	67%	**63	90%
[Winchester 748]*	<<locked>>	84%	35041	78%	**40	90%

Start Load - Barrel Length: 23.60''

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