Load data for .256 Mag. Gibbs + .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:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	3.004" \| 76.3mm
Seated Depth:	0.146" \| 3.7mm
Shank Seated Depth:	0.146" \| 3.7mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B2970_C231
Last updated:	2025-01-01

Load data for 104 loads in caliber .256 Mag. Gibbs with .257 | 70gr | Impala LWHV LS bullet and 52 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".

Go to the bottom of the "Dashboard " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
We recommend you limit powder range to relevant brands to speed up re-calculation of results
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.
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>>	85%	44092	89%	**37	94%
[ADI AR 2208]*	<<locked>>	90%	43729	89%	**04	93%
Accurate 2495	<<locked>>	84%	44295	90%	**66	100%
Accurate 2520	<<locked>>	84%	44251	90%	**60	98%
Accurate 4064 👍	<<locked>>	89%	43439	88%	**53	99%
Alliant AR-Comp	<<locked>>	84%	44121	89%	**86	100%
Alliant Reloder- TS 15.5	<<locked>>	90%	43642	88%	**53	96%
[Alliant Reloder-15]*	<<locked>>	88%	43772	89%	**53	94%
Alliant Reloder-17	<<locked>>	95%	44266	90%	**28	95%
[Baschieri & Pellagri 107]*	<<locked>>	85%	43874	89%	**46	93%
Hodgdon BL-C2	<<locked>>	83%	43569	88%	**56	96%
[Hodgdon CFE223]*	<<locked>>	89%	43874	89%	**69	93%
[Hodgdon H380]*	<<locked>>	89%	43642	88%	**17	92%
[Hodgdon Hybrid 100V]*	<<locked>>	97%	38189	77%	**02	92%
[Hodgdon LVR]*	<<locked>>	96%	43990	89%	**66	91%
[Hodgdon VARGET]*	<<locked>>	91%	44237	90%	**27	94%
Hodgdon TrailBoss	<<locked>>	96%	32503	66%	**28	100%
IMR 3031 👍	<<locked>>	88%	44135	90%	**15	100%
[IMR 4064]*	<<locked>>	91%	43903	89%	**01	94%
IMR 4895	<<locked>>	87%	43976	89%	**73	95%
Lovex D073.6	<<locked>>	86%	44251	90%	**60	98%
Lovex S060	<<locked>>	84%	43961	89%	**61	95%
Lovex S062	<<locked>>	89%	44164	90%	**27	96%
Norma 201	<<locked>>	85%	44237	90%	**23	96%
Norma 202	<<locked>>	85%	44121	89%	**37	98%
Norma 203B	<<locked>>	89%	43801	89%	**56	95%
[Ramshot Big Game]*	<<locked>>	89%	43743	89%	**66	94%
[Ramshot Wild Boar]*	<<locked>>	83%	43598	88%	**37	94%
ReloadSwiss RS 14	<<locked>>	96%	32779	66%	**77	100%
ReloadSwiss RS 52	<<locked>>	89%	43613	88%	**99	97%
ReloadSwiss RS 60	<<locked>>	95%	44193	90%	**42	96%
Rottweil R 902	<<locked>>	87%	43743	89%	**01	96%
Rottweil R 903	<<locked>>	92%	43468	88%	**40	95%
[SNPE Vectan SP 11]*	<<locked>>	92%	44106	89%	**73	94%
[SNPE Vectan SP 7]*	<<locked>>	85%	44208	90%	**04	92%
[SNPE Vectan SP 9]*	<<locked>>	86%	43918	89%	**27	94%
SNPE Vectan Tubal 3000	<<locked>>	84%	43685	89%	**45	98%
SNPE Vectan Tubal 5000	<<locked>>	90%	43874	89%	**55	99%
Shooters World Match Rifle	<<locked>>	86%	44251	90%	**60	98%
Shooters World Precision	<<locked>>	89%	44164	90%	**27	96%
Somchem S335	<<locked>>	84%	43685	89%	**55	99%
[Somchem S341]*	<<locked>>	85%	43743	89%	**14	94%
Somchem S355	<<locked>>	92%	43714	89%	**40	95%
[Somchem S365]*	<<locked>>	96%	36622	74%	**28	94%
Vihtavuori N133	<<locked>>	87%	44193	90%	**71	100%
Vihtavuori N135 👍	<<locked>>	94%	44353	90%	**40	100%
Vihtavuori N140	<<locked>>	87%	43845	89%	**14	99%
Vihtavuori N150	<<locked>>	97%	43047	87%	**94	97%
[Vihtavuori N160]*	<<locked>>	96%	44034	89%	**33	92%
Vihtavuori N540	<<locked>>	87%	43642	89%	**27	98%
[Vihtavuori N550]*	<<locked>>	95%	44005	89%	**79	92%
Winchester 6.5 StaBALL	<<locked>>	96%	44019	89%	**87	95%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	39233	80%	**19	93%
[ADI AR 2208]*	<<locked>>	84%	36042	73%	**00	90%
Accurate 2495	<<locked>>	81%	39987	81%	**71	99%
Accurate 2520	<<locked>>	81%	40103	81%	**55	97%
Accurate 4064	<<locked>>	81%	33605	68%	**97	96%
Alliant AR-Comp	<<locked>>	81%	39769	81%	**87	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	81%	32387	66%	**48	91%
[Alliant Reloder-15]*	<<locked>>	81%	35259	71%	**23	90%
[Alliant Reloder-17]*	<<locked>>	88%	35288	72%	**69	90%
[Baschieri & Pellagri 107]*	<<locked>>	81%	38189	77%	**89	90%
Hodgdon BL-C2	<<locked>>	81%	40147	81%	**71	95%
[Hodgdon CFE223]*	<<locked>>	85%	38406	78%	**28	90%
[Hodgdon H380]*	<<locked>>	86%	39436	80%	**22	90%
[Hodgdon Hybrid 100V]*	<<locked>>	93%	33910	69%	**71	90%
[Hodgdon LVR]*	<<locked>>	93%	40814	83%	**87	90%
[Hodgdon VARGET]*	<<locked>>	83%	35766	73%	**91	90%
Hodgdon TrailBoss	<<locked>>	81%	26107	53%	**54	100%
IMR 3031	<<locked>>	81%	34940	71%	**73	98%
[IMR 4064]*	<<locked>>	84%	35389	72%	**81	90%
[IMR 4895]*	<<locked>>	81%	36114	73%	**59	91%
Lovex D073.6	<<locked>>	81%	37724	77%	**96	96%
[Lovex S060]*	<<locked>>	81%	39972	81%	**69	93%
[Lovex S062]*	<<locked>>	81%	35027	71%	**91	93%
[Norma 201]*	<<locked>>	81%	38798	79%	**76	94%
Norma 202	<<locked>>	81%	38159	77%	**92	97%
[Norma 203B]*	<<locked>>	81%	34461	70%	**04	91%
[Ramshot Big Game]*	<<locked>>	82%	34809	71%	**23	90%
[Ramshot Wild Boar]*	<<locked>>	81%	40422	82%	**45	93%
ReloadSwiss RS 14	<<locked>>	81%	26469	54%	**06	100%
[ReloadSwiss RS 52]*	<<locked>>	81%	32822	67%	**00	92%
[ReloadSwiss RS 60]*	<<locked>>	87%	33968	69%	**20	90%
[Rottweil R 902]*	<<locked>>	81%	36709	74%	**20	94%
[Rottweil R 903]*	<<locked>>	82%	31415	64%	**15	90%
[SNPE Vectan SP 11]*	<<locked>>	85%	35114	71%	**33	90%
[SNPE Vectan SP 7]*	<<locked>>	82%	40219	82%	**05	90%
[SNPE Vectan SP 9]*	<<locked>>	81%	37652	76%	**69	92%
SNPE Vectan Tubal 3000	<<locked>>	81%	40408	82%	**63	98%
SNPE Vectan Tubal 5000	<<locked>>	81%	33286	67%	**86	97%
Shooters World Match Rifle	<<locked>>	81%	37724	77%	**96	96%
[Shooters World Precision]*	<<locked>>	81%	35027	71%	**91	93%
Somchem S335	<<locked>>	81%	39682	80%	**59	98%
[Somchem S341]*	<<locked>>	81%	38957	79%	**92	93%
[Somchem S355]*	<<locked>>	82%	32489	66%	**31	90%
[Somchem S365]*	<<locked>>	91%	31372	64%	**45	90%
Vihtavuori N133	<<locked>>	81%	37579	76%	**14	99%
Vihtavuori N135	<<locked>>	81%	29965	61%	**63	96%
Vihtavuori N140	<<locked>>	81%	36085	73%	**10	97%
[Vihtavuori N150]*	<<locked>>	84%	28921	59%	**97	90%
[Vihtavuori N160]*	<<locked>>	92%	38827	79%	**96	90%
Vihtavuori N540	<<locked>>	81%	36013	73%	**33	96%
[Vihtavuori N550]*	<<locked>>	92%	39117	79%	**51	90%
[Winchester 6.5 StaBALL]*	<<locked>>	88%	33881	69%	**12	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