Load data for .300 Weath. Mag. + .308 | 150gr | Sierra SBT GameKing

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.308 \| 150gr \| Sierra SBT GameKing
Manufacturer SKU:	2125
Bullet Weight:	150gr \| 9.7g
Bullet Diameter:	0.308" \| 7.82mm
Bullet Length:	1.096" \| 27.8mm
Caliber:	.300 Weath. Mag. load data
Case Length (l3):	2.824" \| 71.7mm
Cartridge Length (C.O.L.):	3.507" \| 89.1mm
Seated Depth:	0.413" \| 10.5mm
Shank Seated Depth:	0.263" \| 6.7mm
Case Capacity:	98.9 Grains of Water \| 6.42 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	63817 psi \| 4400 bar
LID:	LID_B5873_C379
Last updated:	2025-01-01
Recommended Twist Rate:	1:15 - 1:13

Load data for 158 loads in caliber .300 Weath. Mag. with .308 | 150gr | Sierra SBT GameKing bullet and 79 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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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 AR 2208	<<locked>>	86%	57203	90%	**27	100%
ADI AR 2209	<<locked>>	97%	57276	90%	**12	98%
ADI AR 2213	<<locked>>	97%	51822	81%	**43	95%
Accurate 2700	<<locked>>	87%	56942	89%	**81	98%
Accurate 3100	<<locked>>	97%	50821	80%	**58	99%
Accurate 4064	<<locked>>	84%	56623	89%	**84	100%
Accurate 4350	<<locked>>	91%	57392	90%	**89	100%
[Accurate MAGPRO]*	<<locked>>	97%	49937	78%	**23	93%
Alliant Reloder- TS 15.5	<<locked>>	85%	57232	90%	**40	100%
Alliant Reloder-15	<<locked>>	83%	57000	89%	**50	100%
Alliant Reloder-16 👍	<<locked>>	93%	56710	89%	**32	100%
Alliant Reloder-17	<<locked>>	88%	56681	89%	**28	100%
Alliant Reloder-19	<<locked>>	97%	56521	89%	**99	98%
Alliant Reloder-22	<<locked>>	97%	50821	80%	**33	97%
Alliant Reloder-23	<<locked>>	97%	48283	76%	**81	100%
Alliant Reloder-25	<<locked>>	97%	41539	65%	**69	98%
Alliant Reloder-26	<<locked>>	97%	55448	87%	**81	100%
Hodgdon CFE223	<<locked>>	83%	57319	90%	**82	100%
Hodgdon H380	<<locked>>	84%	56985	89%	**53	100%
Hodgdon H414	<<locked>>	87%	57421	90%	**09	99%
Hodgdon H4350	<<locked>>	94%	57290	90%	**53	99%
[Hodgdon H4831]*	<<locked>>	97%	47529	74%	**95	93%
Hodgdon H4831 SC	<<locked>>	97%	54389	85%	**33	95%
Hodgdon Hybrid 100V	<<locked>>	95%	57000	89%	**46	100%
Hodgdon LVR	<<locked>>	90%	57348	90%	**96	100%
Hodgdon Superperformance 👍	<<locked>>	90%	57348	90%	**35	99%
Hodgdon VARGET	<<locked>>	86%	57203	90%	**27	100%
Hodgdon TrailBoss	<<locked>>	96%	34606	54%	**52	100%
IMR 4064	<<locked>>	86%	56985	89%	**10	100%
IMR 4166 Enduron	<<locked>>	87%	56956	89%	**14	99%
IMR 4350	<<locked>>	93%	57334	90%	**56	99%
IMR 4451 Enduron	<<locked>>	88%	57188	90%	**36	99%
IMR 4831	<<locked>>	96%	56695	89%	**66	100%
IMR 4955 Enduron	<<locked>>	97%	53098	83%	**71	95%
IMR 7828 SSC	<<locked>>	97%	53447	84%	**79	96%
Lovex S062	<<locked>>	84%	57276	90%	**04	100%
Lovex S065	<<locked>>	90%	56724	89%	**23	100%
Lovex S070	<<locked>>	91%	57072	89%	**50	99%
Lovex S071	<<locked>>	97%	42366	66%	**87	97%
Norma 203B	<<locked>>	84%	57145	90%	**50	100%
Norma 204	<<locked>>	92%	56811	89%	**86	98%
Norma MRP	<<locked>>	97%	53635	84%	**28	99%
Norma URP	<<locked>>	92%	57261	90%	**92	100%
Ramshot Big Game	<<locked>>	83%	57159	90%	**63	100%
Ramshot Hunter 👍	<<locked>>	93%	57203	90%	**05	99%
Ramshot Magnum	<<locked>>	97%	49690	78%	**94	97%
ReloadSwiss RS 14	<<locked>>	97%	35621	56%	**05	100%
ReloadSwiss RS 50	<<locked>>	85%	56884	89%	**33	99%
ReloadSwiss RS 52	<<locked>>	83%	57261	90%	**66	100%
ReloadSwiss RS 60	<<locked>>	89%	57377	90%	**64	100%
ReloadSwiss RS 62 👍	<<locked>>	91%	56956	89%	**05	100%
ReloadSwiss RS 70 👍	<<locked>>	92%	57058	89%	**58	100%
ReloadSwiss RS 76	<<locked>>	97%	40886	64%	**82	95%
Rottweil R 903	<<locked>>	87%	56768	89%	**23	100%
Rottweil R 904	<<locked>>	96%	57014	89%	**46	97%
Rottweil R 905	<<locked>>	97%	55825	87%	**82	98%
Rottweil R 907	<<locked>>	89%	57029	89%	**30	99%
SNPE Vectan SP 11	<<locked>>	86%	57217	90%	**69	100%
SNPE Vectan Tubal 5000	<<locked>>	86%	57174	90%	**05	100%
SNPE Vectan Tubal 7000	<<locked>>	90%	57392	90%	**91	99%
Shooters World Long Rifle	<<locked>>	90%	56724	89%	**23	100%
Shooters World Precision	<<locked>>	84%	57276	90%	**04	100%
Somchem S355	<<locked>>	87%	57377	90%	**40	100%
Somchem S361	<<locked>>	95%	57145	90%	**07	96%
Somchem S365	<<locked>>	94%	57029	89%	**05	100%
Somchem S385	<<locked>>	97%	57130	90%	**63	99%
Vihtavuori N135	<<locked>>	88%	56753	89%	**45	100%
Vihtavuori N140	<<locked>>	83%	57406	90%	**58	100%
Vihtavuori N150	<<locked>>	92%	56884	89%	**84	100%
Vihtavuori N160	<<locked>>	89%	56869	89%	**36	100%
Vihtavuori N165	<<locked>>	97%	47471	74%	**76	96%
Vihtavuori N540	<<locked>>	83%	57363	90%	**84	100%
Vihtavuori N550	<<locked>>	89%	57087	89%	**86	100%
Vihtavuori N555	<<locked>>	97%	54012	85%	**73	100%
Vihtavuori N560	<<locked>>	97%	51140	80%	**53	95%
[Vihtavuori N565]*	<<locked>>	97%	43410	68%	**76	92%
Winchester 6.5 StaBALL	<<locked>>	91%	57203	90%	**23	100%
Winchester 760	<<locked>>	87%	57421	90%	**09	99%
Winchester StaBALL HD	<<locked>>	97%	43047	67%	**23	100%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2208	<<locked>>	81%	49153	77%	**86	100%
[ADI AR 2209]*	<<locked>>	82%	34780	55%	**26	90%
[ADI AR 2213]*	<<locked>>	89%	39233	61%	**61	90%
Accurate 2700	<<locked>>	81%	47384	74%	**07	97%
[Accurate 3100]*	<<locked>>	81%	29559	46%	**66	92%
Accurate 4064	<<locked>>	81%	52315	82%	**22	100%
Accurate 4350	<<locked>>	81%	40248	63%	**67	98%
[Accurate MAGPRO]*	<<locked>>	93%	43656	68%	**86	90%
Alliant Reloder- TS 15.5	<<locked>>	81%	49545	78%	**15	100%
Alliant Reloder-15	<<locked>>	81%	53214	83%	**91	100%
Alliant Reloder-16	<<locked>>	81%	38812	61%	**67	98%
Alliant Reloder-17	<<locked>>	81%	44295	69%	**05	100%
[Alliant Reloder-19]*	<<locked>>	81%	33939	53%	**07	90%
[Alliant Reloder-22]*	<<locked>>	85%	34040	53%	**40	90%
Alliant Reloder-23	<<locked>>	81%	28543	45%	**92	95%
[Alliant Reloder-25]*	<<locked>>	85%	28268	44%	**75	90%
[Alliant Reloder-26]*	<<locked>>	81%	30618	48%	**07	93%
Hodgdon CFE223	<<locked>>	81%	52736	83%	**14	100%
Hodgdon H380	<<locked>>	81%	50546	79%	**41	99%
Hodgdon H414	<<locked>>	81%	45788	72%	**95	97%
[Hodgdon H4350]*	<<locked>>	81%	37579	59%	**46	93%
[Hodgdon H4831]*	<<locked>>	91%	39624	62%	**25	90%
[Hodgdon H4831 SC]*	<<locked>>	88%	39624	62%	**25	90%
Hodgdon Hybrid 100V	<<locked>>	81%	36318	57%	**53	98%
Hodgdon LVR	<<locked>>	81%	42946	67%	**23	98%
Hodgdon Superperformance	<<locked>>	81%	41234	65%	**13	95%
Hodgdon VARGET	<<locked>>	81%	48718	76%	**76	100%
Hodgdon TrailBoss	<<locked>>	81%	27688	43%	**91	100%
IMR 4064	<<locked>>	81%	48211	76%	**59	100%
IMR 4166 Enduron	<<locked>>	81%	47340	74%	**27	97%
[IMR 4350]*	<<locked>>	81%	39392	62%	**92	94%
IMR 4451 Enduron	<<locked>>	81%	45411	71%	**17	97%
IMR 4831	<<locked>>	81%	34954	55%	**23	96%
[IMR 4955 Enduron]*	<<locked>>	87%	38725	61%	**66	90%
[IMR 7828 SSC]*	<<locked>>	88%	38812	61%	**58	90%
Lovex S062	<<locked>>	81%	52098	82%	**28	100%
Lovex S065	<<locked>>	81%	42975	67%	**61	97%
Lovex S070	<<locked>>	81%	41104	64%	**41	96%
[Lovex S071]*	<<locked>>	84%	27601	43%	**97	90%
Norma 203B	<<locked>>	81%	52707	83%	**77	100%
[Norma 204]*	<<locked>>	81%	39001	61%	**15	92%
[Norma MRP]*	<<locked>>	81%	30908	48%	**80	90%
Norma URP	<<locked>>	81%	39885	62%	**61	98%
Ramshot Big Game	<<locked>>	81%	53185	83%	**04	100%
Ramshot Hunter	<<locked>>	81%	38667	61%	**38	96%
[Ramshot Magnum]*	<<locked>>	86%	33170	52%	**94	90%
ReloadSwiss RS 14	<<locked>>	81%	28268	44%	**37	100%
ReloadSwiss RS 50	<<locked>>	81%	50633	79%	**22	98%
ReloadSwiss RS 52	<<locked>>	81%	52663	83%	**94	100%
ReloadSwiss RS 60	<<locked>>	81%	42902	67%	**09	100%
ReloadSwiss RS 62	<<locked>>	81%	39900	63%	**77	98%
ReloadSwiss RS 70	<<locked>>	81%	38754	61%	**87	97%
[ReloadSwiss RS 76]*	<<locked>>	91%	32982	52%	**46	90%
Rottweil R 903	<<locked>>	81%	47297	74%	**72	100%
[Rottweil R 904]*	<<locked>>	82%	36970	58%	**36	90%
[Rottweil R 905]*	<<locked>>	82%	33547	53%	**03	90%
Rottweil R 907	<<locked>>	81%	44019	69%	**87	96%
SNPE Vectan SP 11	<<locked>>	81%	48689	76%	**28	100%
SNPE Vectan Tubal 5000	<<locked>>	81%	48196	76%	**67	100%
SNPE Vectan Tubal 7000	<<locked>>	81%	42221	66%	**05	96%
Shooters World Long Rifle	<<locked>>	81%	42975	67%	**61	97%
Shooters World Precision	<<locked>>	81%	52098	82%	**28	100%
Somchem S355	<<locked>>	81%	47558	75%	**66	100%
[Somchem S361]*	<<locked>>	84%	39581	62%	**66	90%
Somchem S365	<<locked>>	81%	36085	57%	**12	99%
[Somchem S385]*	<<locked>>	81%	33533	53%	**74	92%
Vihtavuori N135	<<locked>>	81%	46209	72%	**74	100%
Vihtavuori N140	<<locked>>	81%	53606	84%	**05	100%
Vihtavuori N150	<<locked>>	81%	40553	64%	**95	100%
Vihtavuori N160	<<locked>>	81%	43047	67%	**97	98%
[Vihtavuori N165]*	<<locked>>	85%	32126	50%	**25	90%
Vihtavuori N540	<<locked>>	81%	53490	84%	**28	100%
Vihtavuori N550	<<locked>>	81%	43439	68%	**40	98%
Vihtavuori N555	<<locked>>	81%	31691	50%	**87	96%
[Vihtavuori N560]*	<<locked>>	89%	39291	62%	**94	90%
[Vihtavuori N565]*	<<locked>>	93%	37956	59%	**51	90%
Winchester 6.5 StaBALL	<<locked>>	81%	40611	64%	**25	100%
Winchester 760	<<locked>>	81%	45788	72%	**95	97%
[Winchester StaBALL HD]*	<<locked>>	81%	25208	40%	**30	93%

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.