Load data for .338 Federal + .338 | 300gr | Sierra HPBT LR MatchKing

Recommended Powder(s): Accurate 2520, Hodgdon BL-C2, Somchem S321, Winchester 748, Winchester StaBALL Match

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.338 \| 300gr \| Sierra HPBT LR MatchKing
Manufacturer SKU:	9300
Bullet Weight:	300gr \| 19.4g
Bullet Diameter:	0.338" \| 8.59mm
Bullet Length:	1.736" \| 44.1mm
Caliber:	.338 Federal load data
Case Length (l3):	2.014" \| 51.2mm
Cartridge Length (C.O.L.):	2.778" \| 70.6mm
Seated Depth:	0.972" \| 24.7mm
Shank Seated Depth:	0.722" \| 18.3mm
Case Capacity:	57.5 Grains of Water \| 3.73 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	60191 psi \| 4150 bar
LID:	LID_B5931_C450
Last updated:	2025-08-05
Recommended Twist Rate:	1:11 - 1:9

Load data for 172 loads in caliber .338 Federal with .338 | 300gr | Sierra HPBT LR MatchKing bullet and 86 powders such as Accurate 2520, Hodgdon BL-C2, Somchem S321, Winchester 748, Winchester StaBALL Match. 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 AR 2206H	<<locked>>	96%	50053	83%	**32	99%
ADI AR 2207	<<locked>>	86%	53388	89%	**47	100%
ADI AR 2208	<<locked>>	97%	43308	72%	**34	97%
ADI AR 2219	<<locked>>	89%	53374	89%	**39	100%
Accurate 2015	<<locked>>	94%	53156	88%	**93	100%
Accurate 2200	<<locked>>	95%	52765	88%	**19	98%
Accurate 2230	<<locked>>	92%	53330	89%	**29	99%
Accurate 2460	<<locked>>	92%	52982	88%	**32	100%
Accurate 2495	<<locked>>	97%	49313	82%	**26	100%
Accurate 2520 👍	<<locked>>	96%	51488	86%	**55	100%
Accurate 4064	<<locked>>	97%	40611	67%	**44	100%
Alliant AR-Comp	<<locked>>	97%	51735	86%	**32	100%
Alliant Reloder- TS 15.5	<<locked>>	96%	40654	68%	**41	98%
Alliant Reloder-10x	<<locked>>	92%	53838	89%	**03	100%
Alliant Reloder-15	<<locked>>	96%	44280	74%	**80	98%
[Alliant Reloder-16]*	<<locked>>	96%	32648	54%	**19	92%
Alliant Reloder-17	<<locked>>	96%	36347	60%	**18	96%
Alliant Reloder-7	<<locked>>	85%	53040	88%	**44	100%
Baschieri & Pellagri 106	<<locked>>	89%	54012	90%	**67	100%
Baschieri & Pellagri 107	<<locked>>	97%	50531	84%	**52	98%
Hodgdon BL-C2 👍	<<locked>>	97%	52823	88%	**88	100%
Hodgdon Benchmark	<<locked>>	95%	53316	89%	**03	100%
Hodgdon CFE BLK	<<locked>>	86%	54128	90%	**80	100%
Hodgdon CFE223	<<locked>>	97%	43932	73%	**96	96%
Hodgdon H322	<<locked>>	95%	54012	90%	**42	100%
Hodgdon H335	<<locked>>	89%	53447	89%	**52	100%
Hodgdon H380	<<locked>>	97%	42641	71%	**54	96%
Hodgdon H4198	<<locked>>	87%	53055	88%	**47	100%
[Hodgdon LVR]*	<<locked>>	96%	34679	58%	**52	92%
Hodgdon VARGET	<<locked>>	97%	42960	71%	**27	97%
IMR 3031	<<locked>>	96%	43700	73%	**80	100%
IMR 4064	<<locked>>	96%	41249	69%	**01	97%
[IMR 4166 Enduron]*	<<locked>>	96%	42496	71%	**78	92%
IMR 4198	<<locked>>	90%	53301	89%	**54	100%
[IMR 4451 Enduron]*	<<locked>>	96%	40161	67%	**72	91%
IMR 4895	<<locked>>	96%	45281	75%	**06	98%
IMR 8208 XBR	<<locked>>	96%	53258	88%	**36	100%
Lovex D073.4	<<locked>>	91%	54143	90%	**29	100%
Lovex D073.5	<<locked>>	93%	53969	90%	**39	100%
Lovex D073.6	<<locked>>	97%	48733	81%	**29	100%
Lovex S060	<<locked>>	97%	52170	87%	**90	99%
Lovex S062	<<locked>>	97%	44092	73%	**54	99%
[Lovex S065]*	<<locked>>	97%	35897	60%	**32	92%
Norma 200	<<locked>>	87%	53693	89%	**83	100%
Norma 201	<<locked>>	97%	49559	82%	**03	100%
Norma 202	<<locked>>	96%	49226	82%	**06	100%
Norma 203B	<<locked>>	96%	43424	72%	**73	98%
[Norma URP]*	<<locked>>	96%	31647	53%	**16	92%
Ramshot Big Game	<<locked>>	96%	43845	73%	**86	98%
Ramshot TAC	<<locked>>	96%	53679	89%	**42	97%
Ramshot Wild Boar	<<locked>>	97%	53272	89%	**72	99%
Ramshot X-Terminator	<<locked>>	93%	52779	88%	**19	99%
ReloadSwiss RS 40	<<locked>>	93%	53940	90%	**39	100%
[ReloadSwiss RS 50]*	<<locked>>	96%	43497	72%	**34	94%
ReloadSwiss RS 52	<<locked>>	97%	42279	70%	**93	99%
ReloadSwiss RS 60	<<locked>>	96%	35418	59%	**04	96%
Rottweil R 901	<<locked>>	96%	53084	88%	**16	100%
Rottweil R 902	<<locked>>	96%	46209	77%	**57	99%
Rottweil R 903	<<locked>>	96%	37159	62%	**98	97%
SNPE Vectan SP 10	<<locked>>	88%	53171	88%	**39	100%
SNPE Vectan SP 11	<<locked>>	97%	40132	67%	**44	97%
SNPE Vectan SP 7	<<locked>>	97%	52402	87%	**36	97%
SNPE Vectan SP 9	<<locked>>	97%	49124	82%	**19	99%
SNPE Vectan Tubal 3000	<<locked>>	97%	53287	89%	**73	100%
SNPE Vectan Tubal 5000	<<locked>>	97%	43076	72%	**81	100%
[Shooters World Long Rifle]*	<<locked>>	97%	35897	60%	**32	92%
Shooters World Match Rifle	<<locked>>	97%	48733	81%	**29	100%
Shooters World Precision	<<locked>>	97%	44092	73%	**54	99%
Shooters World Tactical Rifle	<<locked>>	89%	52823	88%	**00	99%
Somchem S321 👍	<<locked>>	94%	53026	88%	**59	100%
Somchem S335	<<locked>>	97%	50908	85%	**70	100%
Somchem S341	<<locked>>	97%	51692	86%	**36	99%
Somchem S355	<<locked>>	97%	38885	65%	**08	97%
Vihtavuori N120	<<locked>>	88%	52953	88%	**04	100%
Vihtavuori N130	<<locked>>	94%	54099	90%	**67	100%
Vihtavuori N133	<<locked>>	97%	48704	81%	**31	100%
Vihtavuori N135	<<locked>>	97%	37333	62%	**62	100%
Vihtavuori N140	<<locked>>	97%	46166	77%	**57	100%
Vihtavuori N150	<<locked>>	96%	32634	54%	**96	97%
[Vihtavuori N160]*	<<locked>>	97%	35462	59%	**49	93%
Vihtavuori N530	<<locked>>	94%	53258	88%	**46	100%
Vihtavuori N540	<<locked>>	97%	46079	77%	**83	100%
[Vihtavuori N550]*	<<locked>>	97%	34969	58%	**81	93%
Winchester 6.5 StaBALL	<<locked>>	97%	35201	58%	**22	95%
Winchester 748 👍	<<locked>>	94%	53171	88%	**85	100%
Winchester StaBALL Match 👍	<<locked>>	92%	53287	89%	**78	99%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	31328	52%	**67	94%
ADI AR 2207	<<locked>>	81%	46108	77%	**75	100%
[ADI AR 2208]*	<<locked>>	86%	31270	52%	**47	93%
ADI AR 2219	<<locked>>	81%	41060	68%	**01	100%
Accurate 2015	<<locked>>	81%	35520	59%	**93	100%
[Accurate 2200]*	<<locked>>	81%	33533	56%	**67	93%
Accurate 2230	<<locked>>	81%	36738	61%	**32	97%
Accurate 2460	<<locked>>	81%	36579	61%	**39	98%
Accurate 2495	<<locked>>	81%	29472	49%	**70	100%
Accurate 2520	<<locked>>	81%	30530	51%	**83	98%
Accurate 4064	<<locked>>	85%	27934	46%	**47	98%
Alliant AR-Comp	<<locked>>	81%	31154	52%	**86	100%
Alliant Reloder- TS 15.5	<<locked>>	85%	29051	48%	**54	95%
Alliant Reloder-10x	<<locked>>	81%	39131	65%	**42	100%
[Alliant Reloder-15]*	<<locked>>	83%	29008	48%	**47	93%
[Alliant Reloder-16]*	<<locked>>	94%	30037	50%	**67	90%
[Alliant Reloder-17]*	<<locked>>	88%	27775	46%	**50	92%
Alliant Reloder-7	<<locked>>	81%	47427	79%	**91	100%
Baschieri & Pellagri 106	<<locked>>	81%	41423	69%	**36	100%
[Baschieri & Pellagri 107]*	<<locked>>	81%	30458	51%	**60	92%
Hodgdon BL-C2	<<locked>>	81%	30835	51%	**99	96%
Hodgdon Benchmark	<<locked>>	81%	35578	59%	**80	98%
Hodgdon CFE BLK	<<locked>>	81%	46180	77%	**95	99%
[Hodgdon CFE223]*	<<locked>>	83%	28616	48%	**44	90%
Hodgdon H322	<<locked>>	81%	35041	58%	**19	100%
Hodgdon H335	<<locked>>	81%	40379	67%	**08	100%
[Hodgdon H380]*	<<locked>>	85%	29341	49%	**47	91%
Hodgdon H4198	<<locked>>	81%	44788	74%	**59	100%
[Hodgdon LVR]*	<<locked>>	92%	30327	50%	**73	90%
[Hodgdon VARGET]*	<<locked>>	86%	31575	52%	**54	93%
IMR 3031	<<locked>>	82%	28239	47%	**50	99%
[IMR 4064]*	<<locked>>	87%	31067	52%	**44	93%
[IMR 4166 Enduron]*	<<locked>>	91%	36129	60%	**83	90%
IMR 4198	<<locked>>	81%	41002	68%	**26	100%
[IMR 4451 Enduron]*	<<locked>>	94%	36840	61%	**26	90%
[IMR 4895]*	<<locked>>	82%	28718	48%	**50	93%
IMR 8208 XBR	<<locked>>	81%	33228	55%	**80	97%
Lovex D073.4	<<locked>>	81%	38334	64%	**52	99%
Lovex D073.5	<<locked>>	81%	36172	60%	**32	98%
Lovex D073.6	<<locked>>	81%	28761	48%	**54	97%
Lovex S060	<<locked>>	82%	33837	56%	**50	95%
Lovex S062	<<locked>>	85%	30661	51%	**54	96%
[Lovex S065]*	<<locked>>	92%	31227	52%	**54	90%
Norma 200	<<locked>>	81%	44150	73%	**85	100%
Norma 201	<<locked>>	82%	31430	52%	**54	96%
Norma 202	<<locked>>	81%	30429	51%	**54	98%
[Norma 203B]*	<<locked>>	83%	28587	47%	**40	93%
[Norma URP]*	<<locked>>	94%	29095	48%	**67	90%
[Ramshot Big Game]*	<<locked>>	84%	29327	49%	**57	93%
[Ramshot TAC]*	<<locked>>	81%	33243	55%	**70	91%
[Ramshot Wild Boar]*	<<locked>>	81%	31531	52%	**83	94%
Ramshot X-Terminator	<<locked>>	81%	36289	60%	**13	96%
ReloadSwiss RS 40	<<locked>>	81%	37478	62%	**45	99%
[ReloadSwiss RS 50]*	<<locked>>	89%	33939	56%	**96	90%
ReloadSwiss RS 52	<<locked>>	83%	27253	45%	**40	95%
[ReloadSwiss RS 60]*	<<locked>>	88%	27354	45%	**40	92%
Rottweil R 901	<<locked>>	81%	34026	57%	**80	99%
Rottweil R 902	<<locked>>	83%	31053	52%	**44	96%
[Rottweil R 903]*	<<locked>>	87%	27688	46%	**40	94%
SNPE Vectan SP 10	<<locked>>	81%	41452	69%	**08	100%
[SNPE Vectan SP 11]*	<<locked>>	85%	28398	47%	**44	92%
[SNPE Vectan SP 7]*	<<locked>>	81%	30574	51%	**44	91%
[SNPE Vectan SP 9]*	<<locked>>	81%	29979	50%	**44	94%
SNPE Vectan Tubal 3000	<<locked>>	83%	34664	58%	**54	99%
SNPE Vectan Tubal 5000	<<locked>>	88%	33141	55%	**54	99%
[Shooters World Long Rifle]*	<<locked>>	92%	31227	52%	**54	90%
Shooters World Match Rifle	<<locked>>	81%	28761	48%	**54	97%
Shooters World Precision	<<locked>>	85%	30661	51%	**54	96%
Shooters World Tactical Rifle	<<locked>>	81%	39827	66%	**49	98%
Somchem S321	<<locked>>	81%	35201	58%	**36	97%
Somchem S335	<<locked>>	82%	32880	55%	**44	99%
[Somchem S341]*	<<locked>>	81%	30792	51%	**50	94%
[Somchem S355]*	<<locked>>	87%	29341	49%	**54	94%
Vihtavuori N120	<<locked>>	81%	43207	72%	**09	100%
Vihtavuori N130	<<locked>>	81%	36434	61%	**73	100%
Vihtavuori N133	<<locked>>	84%	33460	56%	**47	100%
Vihtavuori N135	<<locked>>	89%	29472	49%	**44	100%
Vihtavuori N140	<<locked>>	84%	31067	52%	**54	99%
Vihtavuori N150	<<locked>>	93%	29950	50%	**50	96%
[Vihtavuori N160]*	<<locked>>	92%	30168	50%	**57	91%
Vihtavuori N530	<<locked>>	81%	34664	58%	**13	97%
Vihtavuori N540	<<locked>>	83%	29530	49%	**47	98%
[Vihtavuori N550]*	<<locked>>	90%	28195	47%	**57	90%
[Winchester 6.5 StaBALL]*	<<locked>>	93%	30937	51%	**50	94%
Winchester 748	<<locked>>	81%	33997	56%	**39	98%
Winchester StaBALL Match	<<locked>>	81%	36303	60%	**68	97%

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