Load data for .257 Roberts + .257 | 70gr | Impala LWHV LS

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 70gr \| Impala LWHV LS
Bullet Weight:	70gr \| 4.5g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	0.977" \| 24.8mm
Caliber:	.257 Roberts load data
Case Length (l3):	2.233" \| 56.7mm
Cartridge Length (C.O.L.):	2.733" \| 69.4mm
Seated Depth:	0.477" \| 12.1mm
Shank Seated Depth:	0.477" \| 12.1mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	51488 psi \| 3550 bar
LID:	LID_B2970_C241
Last updated:	2025-01-01

Load data for 116 loads in caliber .257 Roberts with .257 | 70gr | Impala LWHV LS bullet and 58 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 AR 2206H]*	<<locked>>	88%	45382	88%	**33	94%
[ADI AR 2208]*	<<locked>>	94%	45847	89%	**14	94%
Accurate 2015	<<locked>>	84%	46311	90%	**14	100%
[Accurate 2200]*	<<locked>>	86%	45745	89%	**94	92%
Accurate 2495	<<locked>>	87%	45252	88%	**69	100%
Accurate 2520	<<locked>>	87%	45310	88%	**46	98%
Accurate 4064 👍	<<locked>>	94%	45847	89%	**69	99%
Alliant AR-Comp	<<locked>>	87%	45324	88%	**76	100%
Alliant Reloder- TS 15.5	<<locked>>	94%	45397	88%	**56	96%
[Alliant Reloder-15]*	<<locked>>	92%	46050	89%	**63	94%
[Alliant Reloder-17]*	<<locked>>	97%	44019	86%	**73	94%
[Baschieri & Pellagri 107]*	<<locked>>	88%	45788	89%	**50	93%
Hodgdon BL-C2	<<locked>>	87%	45919	89%	**83	96%
Hodgdon Benchmark	<<locked>>	84%	45469	88%	**64	97%
[Hodgdon CFE223]*	<<locked>>	93%	46050	89%	**83	93%
Hodgdon H322 👍	<<locked>>	85%	45368	88%	**50	99%
[Hodgdon H380]*	<<locked>>	93%	45339	88%	**17	92%
[Hodgdon VARGET]*	<<locked>>	94%	45527	88%	**10	94%
Hodgdon TrailBoss	<<locked>>	97%	32750	64%	**92	100%
IMR 3031 👍	<<locked>>	92%	45324	88%	**06	100%
[IMR 4064]*	<<locked>>	94%	45701	89%	**04	94%
IMR 4895	<<locked>>	91%	45919	89%	**86	95%
IMR 8208 XBR	<<locked>>	86%	45847	89%	**20	96%
Lovex D073.6	<<locked>>	89%	45310	88%	**46	98%
Lovex S060	<<locked>>	88%	46180	90%	**71	95%
Lovex S062	<<locked>>	92%	45687	89%	**23	96%
Norma 201	<<locked>>	89%	46035	89%	**20	96%
Norma 202	<<locked>>	89%	45455	88%	**30	98%
Norma 203B	<<locked>>	93%	46195	90%	**73	95%
[Ramshot Big Game]*	<<locked>>	92%	45701	89%	**66	94%
Ramshot Wild Boar	<<locked>>	87%	46108	90%	**46	95%
[Ramshot X-Terminator]*	<<locked>>	84%	45614	89%	**78	94%
ReloadSwiss RS 14	<<locked>>	97%	33098	64%	**41	100%
ReloadSwiss RS 52	<<locked>>	94%	46122	90%	**15	97%
[ReloadSwiss RS 60]*	<<locked>>	97%	42757	83%	**56	94%
Rottweil R 901	<<locked>>	85%	45818	89%	**07	98%
Rottweil R 902	<<locked>>	90%	45310	88%	**91	96%
Rottweil R 903	<<locked>>	97%	45919	89%	**63	96%
[SNPE Vectan SP 11]*	<<locked>>	95%	46137	90%	**92	94%
[SNPE Vectan SP 7]*	<<locked>>	87%	45324	88%	**87	92%
SNPE Vectan SP 9	<<locked>>	90%	46325	90%	**50	95%
SNPE Vectan Tubal 3000	<<locked>>	88%	46006	89%	**58	98%
SNPE Vectan Tubal 5000	<<locked>>	94%	45905	89%	**64	99%
Shooters World Match Rifle	<<locked>>	89%	45310	88%	**46	98%
Shooters World Precision	<<locked>>	92%	45687	89%	**23	96%
Somchem S321	<<locked>>	84%	46253	90%	**40	97%
Somchem S335	<<locked>>	88%	46209	90%	**71	99%
[Somchem S341]*	<<locked>>	88%	45658	89%	**07	94%
Somchem S355	<<locked>>	96%	45701	89%	**40	95%
Vihtavuori N130	<<locked>>	84%	45440	88%	**58	100%
Vihtavuori N133	<<locked>>	90%	45600	89%	**61	100%
Vihtavuori N135	<<locked>>	96%	44483	86%	**07	100%
Vihtavuori N140	<<locked>>	91%	46209	90%	**17	99%
Vihtavuori N150	<<locked>>	97%	39842	77%	**76	95%
Vihtavuori N530	<<locked>>	85%	45919	89%	**37	96%
Vihtavuori N540	<<locked>>	91%	45397	88%	**30	98%
[Winchester 6.5 StaBALL]*	<<locked>>	97%	41742	81%	**89	93%
Winchester 748	<<locked>>	85%	45440	88%	**73	97%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	36753	71%	**14	91%
[ADI AR 2208]*	<<locked>>	87%	37202	72%	**00	90%
Accurate 2015	<<locked>>	81%	41379	80%	**05	100%
[Accurate 2200]*	<<locked>>	82%	40553	79%	**56	90%
Accurate 2495	<<locked>>	81%	37014	72%	**73	99%
Accurate 2520	<<locked>>	81%	37202	72%	**63	96%
[Accurate 4064]*	<<locked>>	81%	31473	61%	**95	94%
Alliant AR-Comp	<<locked>>	81%	36927	72%	**92	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	83%	32198	63%	**09	90%
[Alliant Reloder-15]*	<<locked>>	84%	36463	71%	**23	90%
[Alliant Reloder-17]*	<<locked>>	91%	36477	71%	**66	90%
[Baschieri & Pellagri 107]*	<<locked>>	83%	38609	75%	**73	90%
[Hodgdon BL-C2]*	<<locked>>	81%	37130	72%	**56	93%
Hodgdon Benchmark	<<locked>>	81%	40930	79%	**59	95%
[Hodgdon CFE223]*	<<locked>>	88%	40074	78%	**32	90%
Hodgdon H322	<<locked>>	81%	40640	79%	**38	98%
[Hodgdon H380]*	<<locked>>	90%	41568	81%	**32	90%
[Hodgdon VARGET]*	<<locked>>	87%	36883	72%	**94	90%
Hodgdon TrailBoss	<<locked>>	81%	25860	50%	**05	100%
IMR 3031	<<locked>>	81%	32430	63%	**71	97%
[IMR 4064]*	<<locked>>	87%	36347	71%	**77	90%
[IMR 4895]*	<<locked>>	82%	35027	68%	**07	90%
[IMR 8208 XBR]*	<<locked>>	81%	38769	75%	**56	94%
Lovex D073.6	<<locked>>	81%	34809	68%	**91	95%
[Lovex S060]*	<<locked>>	81%	37753	73%	**64	92%
[Lovex S062]*	<<locked>>	81%	32677	63%	**86	91%
[Norma 201]*	<<locked>>	81%	36608	71%	**87	93%
Norma 202	<<locked>>	81%	35897	70%	**04	96%
[Norma 203B]*	<<locked>>	83%	34476	67%	**71	90%
[Ramshot Big Game]*	<<locked>>	85%	36463	71%	**33	90%
[Ramshot Wild Boar]*	<<locked>>	81%	37304	72%	**33	91%
[Ramshot X-Terminator]*	<<locked>>	81%	42076	82%	**92	93%
ReloadSwiss RS 14	<<locked>>	81%	26150	51%	**57	100%
[ReloadSwiss RS 52]*	<<locked>>	81%	30980	60%	**95	90%
[ReloadSwiss RS 60]*	<<locked>>	91%	35462	69%	**27	90%
Rottweil R 901	<<locked>>	81%	40118	78%	**76	97%
[Rottweil R 902]*	<<locked>>	81%	34563	67%	**22	92%
[Rottweil R 903]*	<<locked>>	86%	32503	63%	**12	90%
[SNPE Vectan SP 11]*	<<locked>>	88%	36027	70%	**23	90%
[SNPE Vectan SP 7]*	<<locked>>	85%	41553	81%	**92	90%
[SNPE Vectan SP 9]*	<<locked>>	81%	35462	69%	**68	90%
SNPE Vectan Tubal 3000	<<locked>>	81%	38029	74%	**74	97%
SNPE Vectan Tubal 5000	<<locked>>	81%	31111	60%	**94	95%
Shooters World Match Rifle	<<locked>>	81%	34809	68%	**91	95%
[Shooters World Precision]*	<<locked>>	81%	32677	63%	**86	91%
Somchem S321	<<locked>>	81%	41423	80%	**41	95%
Somchem S335	<<locked>>	81%	37710	73%	**81	97%
[Somchem S341]*	<<locked>>	81%	36245	70%	**74	91%
[Somchem S355]*	<<locked>>	85%	33272	65%	**18	90%
Vihtavuori N130	<<locked>>	81%	41829	81%	**73	100%
Vihtavuori N133	<<locked>>	81%	34969	68%	**12	98%
Vihtavuori N135	<<locked>>	81%	27847	54%	**58	95%
Vihtavuori N140	<<locked>>	81%	33417	65%	**09	95%
[Vihtavuori N150]*	<<locked>>	87%	29544	57%	**90	90%
Vihtavuori N530	<<locked>>	81%	40408	78%	**15	95%
Vihtavuori N540	<<locked>>	81%	33243	65%	**22	95%
[Winchester 6.5 StaBALL]*	<<locked>>	92%	35563	69%	**15	90%
Winchester 748	<<locked>>	81%	39900	78%	**45	95%

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