Load data for .300 Rem. SA Ultra Mag + .308 | 150gr Hornady ECX

Recommended Powder(s): Alliant Reloder-15, Hodgdon BL-C2, IMR 4895, Norma 203B, ReloadSwiss RS 52

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.308 \| 150gr Hornady ECX
Manufacturer SKU:	30372
Bullet Weight:	150gr \| 9.7g
Bullet Diameter:	0.308" \| 7.82mm
Bullet Length:	1.200" \| 30.5mm
Caliber:	.300 Rem. SA Ultra Mag load data
Case Length (l3):	2.003" \| 50.9mm
Cartridge Length (C.O.L.):	2.543" \| 64.6mm
Seated Depth:	0.660" \| 16.8mm
Shank Seated Depth:	0.660" \| 16.8mm
Case Capacity:	74.0 Grains of Water \| 4.80 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	64107 psi \| 4420 bar
LID:	LID_B1382_C373
Last updated:	2025-01-01

Load data for 200 loads in caliber .300 Rem. SA Ultra Mag with .308 | 150gr Hornady ECX bullet and 100 powders such as Alliant Reloder-15, Hodgdon BL-C2, IMR 4895, Norma 203B, ReloadSwiss RS 52. 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 (%)
Min FR (%)
Max FR*
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Barrel Length (cm)
Safety Buffer (%)
.
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 2206H	<<locked>>	92%	57406	90%	**95	100%
ADI AR 2208	<<locked>>	97%	55506	87%	**36	99%
ADI AR 2219	<<locked>>	83%	56695	88%	**43	100%
Accurate 2015	<<locked>>	88%	57319	89%	**84	100%
Accurate 2200	<<locked>>	91%	57624	90%	**53	99%
Accurate 2230	<<locked>>	86%	57377	90%	**36	100%
Accurate 2460	<<locked>>	86%	57290	89%	**40	100%
Accurate 2495	<<locked>>	91%	57116	89%	**56	100%
Accurate 2520	<<locked>>	91%	57537	90%	**82	100%
Accurate 2700	<<locked>>	97%	54650	85%	**48	95%
Accurate 4064	<<locked>>	97%	56608	88%	**69	100%
Accurate 4350	<<locked>>	97%	41989	66%	**95	96%
Alliant AR-Comp	<<locked>>	90%	56681	88%	**33	100%
Alliant Reloder- TS 15.5	<<locked>>	97%	55390	86%	**66	100%
Alliant Reloder-10x	<<locked>>	86%	56869	89%	**94	100%
Alliant Reloder-15 👍	<<locked>>	96%	57363	89%	**05	99%
Alliant Reloder-16	<<locked>>	97%	42163	66%	**99	96%
Alliant Reloder-17	<<locked>>	97%	48341	75%	**56	99%
[Alliant Reloder-23]*	<<locked>>	97%	30240	47%	**07	92%
Baschieri & Pellagri 106	<<locked>>	84%	56869	89%	**38	100%
Baschieri & Pellagri 107	<<locked>>	92%	57101	89%	**02	99%
Hodgdon BL-C2 👍	<<locked>>	90%	56985	89%	**09	100%
Hodgdon Benchmark	<<locked>>	90%	57696	90%	**13	100%
Hodgdon CFE223	<<locked>>	96%	57508	90%	**45	99%
Hodgdon H322	<<locked>>	89%	57421	90%	**49	100%
Hodgdon H335	<<locked>>	84%	57667	90%	**63	100%
Hodgdon H380	<<locked>>	97%	57276	89%	**89	98%
Hodgdon H414	<<locked>>	97%	50473	79%	**33	95%
Hodgdon Hybrid 100V	<<locked>>	97%	38725	60%	**80	97%
Hodgdon LVR	<<locked>>	97%	46427	72%	**51	96%
[Hodgdon Superperformance]*	<<locked>>	97%	46296	72%	**58	92%
Hodgdon VARGET	<<locked>>	97%	54853	86%	**30	99%
Hodgdon TrailBoss	<<locked>>	97%	33330	52%	**55	100%
IMR 3031	<<locked>>	96%	57421	90%	**99	100%
IMR 4064	<<locked>>	97%	54433	85%	**10	99%
IMR 4166 Enduron	<<locked>>	97%	54404	85%	**81	96%
IMR 4198	<<locked>>	86%	57566	90%	**51	100%
[IMR 4350]*	<<locked>>	97%	43540	68%	**33	92%
IMR 4451 Enduron	<<locked>>	97%	51793	81%	**64	95%
[IMR 4831]*	<<locked>>	97%	36027	56%	**41	94%
IMR 4895 👍	<<locked>>	95%	56768	89%	**15	100%
IMR 8208 XBR	<<locked>>	91%	57508	90%	**59	100%
Lovex D073.4	<<locked>>	85%	57043	89%	**27	100%
Lovex D073.5	<<locked>>	87%	57580	90%	**43	100%
Lovex D073.6	<<locked>>	93%	57000	89%	**76	100%
Lovex S060	<<locked>>	92%	57392	90%	**20	99%
Lovex S062	<<locked>>	97%	57667	90%	**76	100%
Lovex S065	<<locked>>	97%	47587	74%	**99	96%
[Lovex S070]*	<<locked>>	96%	44367	69%	**56	93%
Norma 201	<<locked>>	93%	57392	90%	**56	100%
Norma 202	<<locked>>	93%	56840	89%	**53	100%
Norma 203B 👍	<<locked>>	96%	57290	89%	**12	100%
Norma URP	<<locked>>	96%	41872	65%	**79	96%
Ramshot Big Game	<<locked>>	96%	57261	89%	**28	99%
[Ramshot Hunter]*	<<locked>>	97%	42018	66%	**76	93%
Ramshot TAC	<<locked>>	90%	56869	89%	**49	98%
Ramshot Wild Boar	<<locked>>	91%	56927	89%	**82	99%
Ramshot X-Terminator	<<locked>>	88%	56753	89%	**27	99%
ReloadSwiss RS 14	<<locked>>	97%	33504	52%	**91	100%
ReloadSwiss RS 40	<<locked>>	87%	57537	90%	**49	100%
ReloadSwiss RS 50	<<locked>>	97%	57609	90%	**69	97%
ReloadSwiss RS 52 👍	<<locked>>	96%	57058	89%	**31	100%
ReloadSwiss RS 60	<<locked>>	97%	47065	73%	**43	99%
ReloadSwiss RS 62	<<locked>>	97%	41437	65%	**99	95%
[ReloadSwiss RS 70]*	<<locked>>	97%	42859	67%	**18	94%
Rottweil R 901	<<locked>>	90%	57000	89%	**17	100%
Rottweil R 902	<<locked>>	95%	57624	90%	**43	100%
Rottweil R 903	<<locked>>	96%	50850	79%	**04	99%
[Rottweil R 907]*	<<locked>>	97%	49864	78%	**22	94%
SNPE Vectan SP 10	<<locked>>	83%	57609	90%	**59	100%
SNPE Vectan SP 11	<<locked>>	97%	53476	83%	**76	99%
SNPE Vectan SP 7	<<locked>>	91%	57014	89%	**53	98%
SNPE Vectan SP 9	<<locked>>	93%	57377	90%	**82	99%
SNPE Vectan Tubal 3000	<<locked>>	92%	57667	90%	**74	100%
SNPE Vectan Tubal 5000	<<locked>>	97%	54926	86%	**35	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	97%	47253	74%	**49	94%
Shooters World Long Rifle	<<locked>>	97%	47587	74%	**99	96%
Shooters World Match Rifle	<<locked>>	93%	57000	89%	**76	100%
Shooters World Precision	<<locked>>	97%	57667	90%	**76	100%
Shooters World Tactical Rifle	<<locked>>	85%	57522	90%	**20	100%
Somchem S321	<<locked>>	88%	56971	89%	**69	100%
Somchem S335	<<locked>>	93%	57566	90%	**84	100%
Somchem S341	<<locked>>	92%	57363	89%	**63	99%
Somchem S355	<<locked>>	97%	52489	82%	**17	99%
Somchem S365	<<locked>>	97%	37608	59%	**36	98%
Vihtavuori N120	<<locked>>	83%	57363	89%	**76	100%
Vihtavuori N130	<<locked>>	89%	57421	90%	**44	100%
Vihtavuori N133	<<locked>>	94%	56855	89%	**54	100%
Vihtavuori N135	<<locked>>	97%	49559	77%	**15	100%
Vihtavuori N140	<<locked>>	95%	56927	89%	**20	100%
Vihtavuori N150	<<locked>>	97%	43918	69%	**40	99%
Vihtavuori N160	<<locked>>	97%	47079	73%	**31	97%
Vihtavuori N530	<<locked>>	89%	57087	89%	**63	100%
Vihtavuori N540	<<locked>>	95%	57014	89%	**53	100%
Vihtavuori N550	<<locked>>	97%	47007	73%	**81	97%
[Vihtavuori N555]*	<<locked>>	96%	31140	49%	**72	92%
Winchester 6.5 StaBALL	<<locked>>	97%	45556	71%	**79	98%
Winchester 748	<<locked>>	88%	57130	89%	**02	100%
Winchester 760	<<locked>>	97%	50473	79%	**33	95%
Winchester StaBALL Match	<<locked>>	86%	57290	89%	**92	100%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2206H	<<locked>>	81%	40205	63%	**84	97%
[ADI AR 2208]*	<<locked>>	81%	34185	53%	**26	94%
ADI AR 2219	<<locked>>	81%	52866	82%	**81	100%
Accurate 2015	<<locked>>	81%	45571	71%	**13	100%
Accurate 2200	<<locked>>	81%	42192	66%	**77	95%
Accurate 2230	<<locked>>	81%	48051	75%	**92	99%
Accurate 2460	<<locked>>	81%	48109	75%	**99	100%
Accurate 2495	<<locked>>	81%	40335	63%	**87	100%
Accurate 2520	<<locked>>	81%	41089	64%	**13	99%
[Accurate 2700]*	<<locked>>	87%	40132	63%	**85	90%
Accurate 4064	<<locked>>	81%	33924	53%	**59	99%
[Accurate 4350]*	<<locked>>	86%	29356	46%	**90	90%
Alliant AR-Comp	<<locked>>	81%	41307	64%	**03	100%
Alliant Reloder- TS 15.5	<<locked>>	81%	33185	52%	**39	95%
Alliant Reloder-10x	<<locked>>	81%	49443	77%	**79	100%
Alliant Reloder-15	<<locked>>	81%	35911	56%	**02	95%
[Alliant Reloder-16]*	<<locked>>	87%	31024	48%	**07	90%
[Alliant Reloder-17]*	<<locked>>	81%	28935	45%	**77	92%
[Alliant Reloder-23]*	<<locked>>	94%	27804	43%	**31	90%
Baschieri & Pellagri 106	<<locked>>	81%	51735	81%	**59	100%
Baschieri & Pellagri 107	<<locked>>	81%	39305	61%	**74	95%
Hodgdon BL-C2	<<locked>>	81%	40901	64%	**26	98%
Hodgdon Benchmark	<<locked>>	81%	44164	69%	**94	99%
[Hodgdon CFE223]*	<<locked>>	81%	34389	54%	**95	93%
Hodgdon H322	<<locked>>	81%	44643	70%	**49	100%
Hodgdon H335	<<locked>>	81%	52011	81%	**77	100%
[Hodgdon H380]*	<<locked>>	81%	33750	53%	**39	92%
[Hodgdon H414]*	<<locked>>	88%	37623	59%	**71	90%
[Hodgdon Hybrid 100V]*	<<locked>>	84%	26382	41%	**43	90%
[Hodgdon LVR]*	<<locked>>	85%	31691	49%	**16	90%
[Hodgdon Superperformance]*	<<locked>>	93%	41017	64%	**43	90%
[Hodgdon VARGET]*	<<locked>>	81%	33837	53%	**16	94%
Hodgdon TrailBoss	<<locked>>	86%	28239	44%	**44	100%
IMR 3031	<<locked>>	81%	36216	56%	**35	100%
[IMR 4064]*	<<locked>>	81%	33301	52%	**93	94%
[IMR 4166 Enduron]*	<<locked>>	84%	37405	58%	**46	90%
IMR 4198	<<locked>>	81%	49806	78%	**46	100%
[IMR 4350]*	<<locked>>	93%	39378	61%	**38	90%
[IMR 4451 Enduron]*	<<locked>>	86%	37594	59%	**82	90%
[IMR 4831]*	<<locked>>	90%	29225	46%	**57	90%
IMR 4895	<<locked>>	81%	36651	57%	**38	96%
IMR 8208 XBR	<<locked>>	81%	42264	66%	**00	98%
Lovex D073.4	<<locked>>	81%	49559	77%	**15	100%
Lovex D073.5	<<locked>>	81%	47601	74%	**89	100%
Lovex D073.6	<<locked>>	81%	38609	60%	**61	99%
Lovex S060	<<locked>>	81%	40944	64%	**31	97%
Lovex S062	<<locked>>	81%	35621	56%	**69	97%
[Lovex S065]*	<<locked>>	85%	32793	51%	**80	90%
[Lovex S070]*	<<locked>>	90%	36680	57%	**98	90%
Norma 201	<<locked>>	81%	39247	61%	**35	98%
Norma 202	<<locked>>	81%	39465	62%	**51	99%
Norma 203B	<<locked>>	81%	35302	55%	**89	95%
[Norma URP]*	<<locked>>	86%	30211	47%	**87	90%
[Ramshot Big Game]*	<<locked>>	81%	34664	54%	**95	94%
[Ramshot Hunter]*	<<locked>>	92%	35433	55%	**21	90%
[Ramshot TAC]*	<<locked>>	81%	42090	66%	**87	94%
Ramshot Wild Boar	<<locked>>	81%	41220	64%	**10	97%
Ramshot X-Terminator	<<locked>>	81%	45832	71%	**46	98%
ReloadSwiss RS 14	<<locked>>	82%	27064	42%	**54	100%
ReloadSwiss RS 40	<<locked>>	81%	47485	74%	**89	100%
[ReloadSwiss RS 50]*	<<locked>>	82%	35099	55%	**36	90%
ReloadSwiss RS 52	<<locked>>	81%	33736	53%	**98	97%
[ReloadSwiss RS 60]*	<<locked>>	81%	28369	44%	**54	92%
[ReloadSwiss RS 62]*	<<locked>>	88%	30966	48%	**33	90%
[ReloadSwiss RS 70]*	<<locked>>	91%	35041	55%	**25	90%
Rottweil R 901	<<locked>>	81%	43207	67%	**97	100%
Rottweil R 902	<<locked>>	81%	37492	58%	**89	97%
[Rottweil R 903]*	<<locked>>	81%	30661	48%	**77	94%
[Rottweil R 907]*	<<locked>>	89%	39131	61%	**18	90%
SNPE Vectan SP 10	<<locked>>	81%	52982	83%	**90	100%
[SNPE Vectan SP 11]*	<<locked>>	81%	31995	50%	**26	93%
[SNPE Vectan SP 7]*	<<locked>>	81%	40219	63%	**57	94%
SNPE Vectan SP 9	<<locked>>	81%	38870	61%	**51	96%
SNPE Vectan Tubal 3000	<<locked>>	81%	41133	64%	**12	100%
SNPE Vectan Tubal 5000	<<locked>>	81%	33910	53%	**70	99%
[SNPE Vectan Tubal 7000]*	<<locked>>	89%	36608	57%	**39	90%
[Shooters World Long Rifle]*	<<locked>>	85%	32793	51%	**80	90%
Shooters World Match Rifle	<<locked>>	81%	38609	60%	**61	99%
Shooters World Precision	<<locked>>	81%	35621	56%	**69	97%
Shooters World Tactical Rifle	<<locked>>	81%	50082	78%	**02	99%
Somchem S321	<<locked>>	81%	45527	71%	**82	99%
Somchem S335	<<locked>>	81%	40466	63%	**12	100%
Somchem S341	<<locked>>	81%	39987	62%	**64	96%
[Somchem S355]*	<<locked>>	81%	31589	49%	**90	94%
[Somchem S365]*	<<locked>>	83%	24120	38%	**23	90%
Vihtavuori N120	<<locked>>	81%	53447	83%	**26	100%
Vihtavuori N130	<<locked>>	81%	45745	71%	**74	100%
Vihtavuori N133	<<locked>>	81%	38667	60%	**66	100%
Vihtavuori N135	<<locked>>	81%	30792	48%	**51	99%
Vihtavuori N140	<<locked>>	81%	36753	57%	**75	99%
[Vihtavuori N150]*	<<locked>>	81%	26992	42%	**46	94%
[Vihtavuori N160]*	<<locked>>	83%	29907	47%	**44	90%
Vihtavuori N530	<<locked>>	81%	44643	70%	**56	99%
Vihtavuori N540	<<locked>>	81%	36463	57%	**98	99%
[Vihtavuori N550]*	<<locked>>	83%	29994	47%	**84	90%
[Vihtavuori N555]*	<<locked>>	94%	28674	45%	**97	90%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	27311	43%	**36	91%
Winchester 748	<<locked>>	81%	44744	70%	**05	99%
[Winchester 760]*	<<locked>>	88%	37623	59%	**71	90%
Winchester StaBALL Match	<<locked>>	81%	47340	74%	**35	99%

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.