Load data for .256 Mag. Gibbs + .257 | 60gr | Hornady InterLock FP

Recommended Powder(s): Accurate 2495, IMR 3031

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 60gr \| Hornady InterLock FP
Manufacturer SKU:	2510
Bullet Weight:	60gr \| 3.9g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	0.505" \| 12.8mm
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	2.556" \| 64.9mm
Seated Depth:	0.122" \| 3.1mm
Shank Seated Depth:	0.122" \| 3.1mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B2561_C231
Last updated:	2025-01-01

Load data for 108 loads in caliber .256 Mag. Gibbs with .257 | 60gr | Hornady InterLock FP bullet and 54 powders such as Accurate 2495, IMR 3031. 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*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
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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 2206H]*	<<locked>>	90%	44150	90%	**50	93%
Accurate 2015	<<locked>>	86%	43714	89%	**20	99%
[Accurate 2230]*	<<locked>>	84%	44077	89%	**91	94%
Accurate 2460	<<locked>>	84%	43700	89%	**10	95%
Accurate 2495 👍	<<locked>>	90%	43961	89%	**96	99%
Accurate 2520	<<locked>>	89%	44034	89%	**60	96%
Accurate 4064	<<locked>>	96%	44092	89%	**83	98%
Alliant AR-Comp	<<locked>>	89%	44222	90%	**19	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	95%	43410	88%	**53	94%
[Alliant Reloder-15]*	<<locked>>	93%	44266	90%	**63	92%
[Hodgdon BL-C2]*	<<locked>>	88%	43830	89%	**63	94%
Hodgdon Benchmark	<<locked>>	86%	44092	89%	**81	95%
Hodgdon H322	<<locked>>	86%	44034	89%	**63	98%
[Hodgdon VARGET]*	<<locked>>	95%	44164	90%	**10	91%
Hodgdon TrailBoss	<<locked>>	96%	31401	64%	**85	100%
IMR 3031 👍	<<locked>>	93%	43772	89%	**29	99%
[IMR 4064]*	<<locked>>	95%	43772	89%	**07	92%
[IMR 4895]*	<<locked>>	92%	43294	88%	**63	92%
[IMR 8208 XBR]*	<<locked>>	88%	43903	89%	**24	94%
Lovex D073.5	<<locked>>	84%	44280	90%	**24	96%
Lovex D073.6	<<locked>>	91%	44382	90%	**66	96%
[Lovex S060]*	<<locked>>	89%	43990	89%	**61	93%
[Lovex S062]*	<<locked>>	94%	43859	89%	**20	94%
[Norma 201]*	<<locked>>	90%	43642	88%	**10	94%
Norma 202	<<locked>>	90%	44353	90%	**63	97%
[Norma 203B]*	<<locked>>	94%	44280	90%	**66	93%
[Ramshot Big Game]*	<<locked>>	93%	43569	88%	**40	92%
[Ramshot Wild Boar]*	<<locked>>	88%	44309	90%	**43	93%
[Ramshot X-Terminator]*	<<locked>>	84%	43642	88%	**74	92%
ReloadSwiss RS 14	<<locked>>	97%	31879	65%	**44	100%
ReloadSwiss RS 40	<<locked>>	84%	43801	89%	**30	96%
ReloadSwiss RS 52	<<locked>>	94%	43250	88%	**86	95%
Rottweil R 901	<<locked>>	87%	44106	89%	**20	97%
[Rottweil R 902]*	<<locked>>	92%	44019	89%	**04	94%
[Rottweil R 903]*	<<locked>>	96%	41655	84%	**97	93%
[SNPE Vectan SP 11]*	<<locked>>	97%	44193	90%	**66	92%
[SNPE Vectan SP 9]*	<<locked>>	90%	43453	88%	**17	92%
SNPE Vectan Tubal 3000	<<locked>>	88%	43555	88%	**51	97%
SNPE Vectan Tubal 5000	<<locked>>	95%	43627	88%	**45	98%
Shooters World Match Rifle	<<locked>>	91%	44382	90%	**66	96%
[Shooters World Precision]*	<<locked>>	94%	43859	89%	**20	94%
[Somchem S321]*	<<locked>>	85%	43395	88%	**17	94%
Somchem S335	<<locked>>	89%	44208	90%	**78	98%
[Somchem S341]*	<<locked>>	89%	43729	89%	**07	92%
[Somchem S355]*	<<locked>>	97%	43395	88%	**20	93%
Vihtavuori N130	<<locked>>	85%	43540	88%	**65	100%
Vihtavuori N133	<<locked>>	91%	43830	89%	**88	99%
Vihtavuori N135	<<locked>>	97%	40727	83%	**74	98%
Vihtavuori N140	<<locked>>	92%	43932	89%	**20	98%
[Vihtavuori N150]*	<<locked>>	97%	36201	73%	**14	92%
[Vihtavuori N530]*	<<locked>>	86%	43845	89%	**43	94%
Vihtavuori N540	<<locked>>	93%	44251	90%	**50	97%
Winchester 748	<<locked>>	86%	43976	89%	**89	95%
[Winchester StaBALL Match]*	<<locked>>	84%	44164	90%	**47	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	85%	38334	78%	**89	90%
Accurate 2015	<<locked>>	81%	37768	77%	**63	98%
[Accurate 2230]*	<<locked>>	81%	39755	81%	**86	92%
[Accurate 2460]*	<<locked>>	81%	39639	80%	**09	94%
Accurate 2495	<<locked>>	81%	31981	65%	**64	96%
[Accurate 2520]*	<<locked>>	81%	33228	67%	**74	92%
[Accurate 4064]*	<<locked>>	81%	26876	55%	**68	90%
Alliant AR-Comp	<<locked>>	81%	33286	67%	**40	99%
[Alliant Reloder- TS 15.5]*	<<locked>>	89%	35172	71%	**20	90%
[Alliant Reloder-15]*	<<locked>>	90%	39943	81%	**51	90%
[Hodgdon BL-C2]*	<<locked>>	82%	34795	71%	**27	90%
[Hodgdon Benchmark]*	<<locked>>	81%	37623	76%	**14	93%
Hodgdon H322	<<locked>>	81%	37188	75%	**86	96%
[Hodgdon VARGET]*	<<locked>>	93%	40973	83%	**28	90%
Hodgdon TrailBoss	<<locked>>	81%	25063	51%	**98	100%
[IMR 3031]*	<<locked>>	81%	28935	59%	**76	93%
[IMR 4064]*	<<locked>>	93%	40132	81%	**06	90%
[IMR 4895]*	<<locked>>	88%	38363	78%	**35	90%
[IMR 8208 XBR]*	<<locked>>	81%	35201	71%	**87	91%
[Lovex D073.5]*	<<locked>>	81%	39102	79%	**96	94%
[Lovex D073.6]*	<<locked>>	81%	30777	62%	**96	91%
[Lovex S060]*	<<locked>>	84%	38305	78%	**14	90%
[Lovex S062]*	<<locked>>	86%	34301	70%	**61	90%
[Norma 201]*	<<locked>>	82%	34084	69%	**41	90%
[Norma 202]*	<<locked>>	81%	32271	65%	**28	93%
[Norma 203B]*	<<locked>>	90%	38218	77%	**15	90%
[Ramshot Big Game]*	<<locked>>	91%	40277	82%	**48	90%
[Ramshot Wild Boar]*	<<locked>>	84%	38551	78%	**96	90%
[Ramshot X-Terminator]*	<<locked>>	81%	38740	79%	**40	90%
ReloadSwiss RS 14	<<locked>>	81%	24772	50%	**41	100%
ReloadSwiss RS 40	<<locked>>	81%	39668	80%	**22	95%
[ReloadSwiss RS 52]*	<<locked>>	87%	33765	68%	**07	90%
[Rottweil R 901]*	<<locked>>	81%	35868	73%	**01	94%
[Rottweil R 902]*	<<locked>>	84%	34461	70%	**41	90%
[Rottweil R 903]*	<<locked>>	92%	35723	72%	**40	90%
[SNPE Vectan SP 11]*	<<locked>>	93%	39305	80%	**45	90%
[SNPE Vectan SP 9]*	<<locked>>	86%	38493	78%	**79	90%
[SNPE Vectan Tubal 3000]*	<<locked>>	81%	34635	70%	**09	94%
[SNPE Vectan Tubal 5000]*	<<locked>>	81%	27920	57%	**12	92%
[Shooters World Match Rifle]*	<<locked>>	81%	30777	62%	**96	91%
[Shooters World Precision]*	<<locked>>	86%	34301	70%	**61	90%
[Somchem S321]*	<<locked>>	81%	37768	77%	**76	92%
Somchem S335	<<locked>>	81%	34011	69%	**15	95%
[Somchem S341]*	<<locked>>	86%	38725	79%	**69	90%
[Somchem S355]*	<<locked>>	91%	36201	73%	**37	90%
Vihtavuori N130	<<locked>>	81%	38421	78%	**37	99%
Vihtavuori N133	<<locked>>	81%	31894	65%	**63	96%
[Vihtavuori N135]*	<<locked>>	81%	24656	50%	**66	91%
[Vihtavuori N140]*	<<locked>>	81%	30081	61%	**30	92%
[Vihtavuori N150]*	<<locked>>	93%	32576	66%	**05	90%
[Vihtavuori N530]*	<<locked>>	81%	37188	75%	**60	92%
[Vihtavuori N540]*	<<locked>>	81%	29979	61%	**33	91%
[Winchester 748]*	<<locked>>	81%	36506	74%	**76	92%
[Winchester StaBALL Match]*	<<locked>>	81%	39204	80%	**28	92%

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.