Load data for .256 Mag. Gibbs + .257 | 85gr | Lehigh Defense Controlled Chaos

Recommended Powder(s): none

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 85gr \| Lehigh Defense Controlled Chaos
Manufacturer SKU:
Bullet Weight:	85gr \| 5.5g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	1.000" \| 25.4mm
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	3.004" \| 76.3mm
Seated Depth:	0.169" \| 4.3mm
Shank Seated Depth:	0.074" \| 1.9mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B11007_C231
Last updated:	2025-11-05
Recommended Twist Rate:	1:11 - 1:9

Load data for 106 loads in caliber .256 Mag. Gibbs with .257 | 85gr | Lehigh Defense Controlled Chaos bullet and 53 powders such as none. 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 2208	<<locked>>	87%	44034	89%	**84	96%
Accurate 4064	<<locked>>	87%	43830	89%	**17	100%
Accurate 4350	<<locked>>	95%	43511	88%	**59	95%
Alliant Reloder- TS 15.5	<<locked>>	87%	43671	89%	**17	98%
Alliant Reloder-15	<<locked>>	85%	44034	89%	**23	96%
Alliant Reloder-16	<<locked>>	96%	43816	89%	**79	95%
Alliant Reloder-17	<<locked>>	92%	44237	90%	**19	97%
Hodgdon CFE223	<<locked>>	86%	43700	89%	**46	95%
Hodgdon H380	<<locked>>	87%	43976	89%	**10	95%
[Hodgdon H414]*	<<locked>>	90%	43555	88%	**43	92%
Hodgdon Hybrid 100V	<<locked>>	97%	41887	85%	**94	97%
[Hodgdon LVR]*	<<locked>>	93%	43932	89%	**46	94%
Hodgdon VARGET	<<locked>>	87%	43685	89%	**77	96%
Hodgdon TrailBoss	<<locked>>	96%	32982	67%	**41	100%
IMR 3031	<<locked>>	85%	43816	89%	**40	100%
IMR 4064	<<locked>>	88%	44077	89%	**87	96%
[IMR 4166 Enduron]*	<<locked>>	88%	44092	89%	**41	92%
[IMR 4451 Enduron]*	<<locked>>	90%	44324	90%	**68	92%
[IMR 4831]*	<<locked>>	97%	38841	79%	**22	94%
IMR 4895	<<locked>>	85%	44092	89%	**46	97%
Lovex S062	<<locked>>	86%	44338	90%	**00	98%
[Lovex S065]*	<<locked>>	92%	44179	90%	**74	94%
[Lovex S070]*	<<locked>>	94%	44179	90%	**97	92%
Norma 203B	<<locked>>	86%	44150	90%	**40	97%
Norma URP	<<locked>>	95%	43627	88%	**59	95%
Ramshot Big Game	<<locked>>	86%	43772	89%	**40	97%
[Ramshot Hunter]*	<<locked>>	96%	43729	89%	**43	93%
ReloadSwiss RS 14	<<locked>>	96%	33286	68%	**93	100%
[ReloadSwiss RS 50]*	<<locked>>	87%	44309	90%	**84	93%
ReloadSwiss RS 52	<<locked>>	86%	43497	88%	**59	98%
ReloadSwiss RS 60	<<locked>>	92%	43685	89%	**25	98%
ReloadSwiss RS 62	<<locked>>	96%	44019	89%	**89	95%
[ReloadSwiss RS 70]*	<<locked>>	95%	43685	89%	**69	94%
Rottweil R 902	<<locked>>	84%	43453	88%	**68	98%
Rottweil R 903	<<locked>>	90%	43961	89%	**23	98%
SNPE Vectan SP 11	<<locked>>	89%	43801	89%	**50	97%
SNPE Vectan SP 9	<<locked>>	83%	44367	90%	**07	97%
SNPE Vectan Tubal 5000	<<locked>>	88%	43947	89%	**12	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	93%	44338	90%	**25	92%
[Shooters World Long Rifle]*	<<locked>>	92%	44179	90%	**74	94%
Shooters World Precision	<<locked>>	86%	44338	90%	**00	98%
Somchem S355	<<locked>>	89%	43918	89%	**07	97%
Somchem S365	<<locked>>	96%	40292	82%	**30	98%
Vihtavuori N133	<<locked>>	84%	44092	89%	**22	100%
Vihtavuori N135	<<locked>>	90%	43830	89%	**77	100%
Vihtavuori N140	<<locked>>	85%	44208	90%	**74	100%
Vihtavuori N150	<<locked>>	94%	43555	88%	**68	98%
Vihtavuori N160	<<locked>>	93%	43584	88%	**04	95%
Vihtavuori N540	<<locked>>	85%	43816	89%	**97	100%
Vihtavuori N550	<<locked>>	92%	43801	89%	**56	95%
[Vihtavuori N555]*	<<locked>>	97%	34287	70%	**66	92%
Winchester 6.5 StaBALL	<<locked>>	94%	44150	90%	**84	98%
[Winchester 760]*	<<locked>>	90%	43555	88%	**43	92%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2208]*	<<locked>>	81%	35984	73%	**90	93%
Accurate 4064	<<locked>>	81%	36201	73%	**36	99%
[Accurate 4350]*	<<locked>>	87%	31850	65%	**58	90%
Alliant Reloder- TS 15.5	<<locked>>	81%	35549	72%	**23	95%
[Alliant Reloder-15]*	<<locked>>	81%	38116	77%	**89	94%
[Alliant Reloder-16]*	<<locked>>	87%	32982	67%	**74	90%
[Alliant Reloder-17]*	<<locked>>	81%	30792	62%	**35	91%
[Hodgdon CFE223]*	<<locked>>	81%	36564	74%	**76	93%
[Hodgdon H380]*	<<locked>>	81%	35752	72%	**04	92%
[Hodgdon H414]*	<<locked>>	88%	40248	82%	**58	90%
[Hodgdon Hybrid 100V]*	<<locked>>	85%	28253	57%	**03	90%
[Hodgdon LVR]*	<<locked>>	85%	34301	70%	**00	90%
[Hodgdon VARGET]*	<<locked>>	81%	35650	72%	**84	93%
Hodgdon TrailBoss	<<locked>>	81%	26426	54%	**80	100%
IMR 3031	<<locked>>	81%	38406	78%	**22	100%
[IMR 4064]*	<<locked>>	81%	35143	71%	**64	93%
[IMR 4166 Enduron]*	<<locked>>	85%	40001	81%	**43	90%
[IMR 4451 Enduron]*	<<locked>>	87%	40190	81%	**76	90%
[IMR 4831]*	<<locked>>	90%	31401	64%	**18	90%
IMR 4895	<<locked>>	81%	39088	79%	**22	95%
Lovex S062	<<locked>>	81%	37710	76%	**43	96%
[Lovex S065]*	<<locked>>	85%	35375	72%	**61	90%
[Lovex S070]*	<<locked>>	90%	39276	80%	**76	90%
Norma 203B	<<locked>>	81%	37637	76%	**79	95%
[Norma URP]*	<<locked>>	87%	32735	66%	**67	90%
[Ramshot Big Game]*	<<locked>>	81%	37014	75%	**76	94%
[Ramshot Hunter]*	<<locked>>	91%	37492	76%	**92	90%
ReloadSwiss RS 14	<<locked>>	81%	26789	54%	**29	100%
[ReloadSwiss RS 50]*	<<locked>>	82%	38014	77%	**23	90%
ReloadSwiss RS 52	<<locked>>	81%	35911	73%	**72	96%
[ReloadSwiss RS 60]*	<<locked>>	81%	30023	61%	**15	91%
[ReloadSwiss RS 62]*	<<locked>>	87%	33011	67%	**97	90%
[ReloadSwiss RS 70]*	<<locked>>	90%	36535	74%	**79	90%
Rottweil R 902	<<locked>>	81%	39305	80%	**66	97%
[Rottweil R 903]*	<<locked>>	81%	32547	66%	**44	94%
[SNPE Vectan SP 11]*	<<locked>>	81%	33837	69%	**90	93%
SNPE Vectan SP 9	<<locked>>	81%	40872	83%	**38	96%
SNPE Vectan Tubal 5000	<<locked>>	81%	35621	72%	**35	99%
[SNPE Vectan Tubal 7000]*	<<locked>>	89%	38928	79%	**10	90%
[Shooters World Long Rifle]*	<<locked>>	85%	35375	72%	**61	90%
Shooters World Precision	<<locked>>	81%	37710	76%	**43	96%
[Somchem S355]*	<<locked>>	81%	33649	68%	**51	94%
[Somchem S365]*	<<locked>>	83%	26295	53%	**94	90%
Vihtavuori N133	<<locked>>	81%	40524	82%	**53	100%
Vihtavuori N135	<<locked>>	81%	32343	66%	**15	99%
Vihtavuori N140	<<locked>>	81%	39088	79%	**69	99%
[Vihtavuori N150]*	<<locked>>	81%	28601	58%	**87	93%
[Vihtavuori N160]*	<<locked>>	84%	32706	66%	**25	90%
Vihtavuori N540	<<locked>>	81%	38798	79%	**79	99%
[Vihtavuori N550]*	<<locked>>	83%	32358	66%	**54	90%
[Vihtavuori N555]*	<<locked>>	94%	30995	63%	**67	90%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	28979	59%	**77	91%
[Winchester 760]*	<<locked>>	88%	40248	82%	**58	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