Load data for .450 N.E. 3 1/4'' + .458 | 260gr | Lehigh Defense Xtreme Penetrator

Recommended Powder(s): Accurate 2015, Alliant AR-Comp, Alliant Reloder-10x

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.458 \| 260gr \| Lehigh Defense Xtreme Penetrator
Manufacturer SKU:	Muzz 07458260SPM
Bullet Weight:	260gr \| 16.8g
Bullet Diameter:	0.458" \| 11.63mm
Bullet Length:	0.925" \| 23.5mm
Caliber:	.450 N.E. 3 1/4'' load data
Case Length (l3):	3.250" \| 82.5mm
Cartridge Length (C.O.L.):	3.575" \| 90.8mm
Seated Depth:	0.600" \| 15.2mm
Shank Seated Depth:	0.600" \| 15.2mm
Case Capacity:	136.0 Grains of Water \| 8.83 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B11111_C765
Last updated:	2025-11-12
Recommended Twist Rate:	1:34 - 1:29

Load data for 80 loads in caliber .450 N.E. 3 1/4'' with .458 | 260gr | Lehigh Defense Xtreme Penetrator bullet and 40 powders such as Accurate 2015, Alliant AR-Comp, Alliant Reloder-10x. 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 2219	<<locked>>	85%	39508	89%	**28	96%
Accurate 2015 👍	<<locked>>	90%	39711	90%	**02	98%
[Accurate 2460]*	<<locked>>	89%	39392	89%	**99	93%
Accurate 2495	<<locked>>	96%	39697	90%	**94	98%
[Accurate 2520]*	<<locked>>	94%	39639	90%	**64	94%
[Accurate 4064]*	<<locked>>	97%	33185	75%	**33	94%
Alliant AR-Comp 👍	<<locked>>	94%	39639	90%	**90	100%
Alliant Reloder-10x 👍	<<locked>>	87%	39465	89%	**15	99%
Baschieri & Pellagri 106	<<locked>>	84%	39740	90%	**26	97%
[Hodgdon BL-C2]*	<<locked>>	94%	39668	90%	**61	92%
[Hodgdon Benchmark]*	<<locked>>	89%	39465	89%	**46	93%
Hodgdon H322	<<locked>>	90%	39813	90%	**38	96%
Hodgdon H335	<<locked>>	85%	39320	89%	**28	95%
Hodgdon TrailBoss	<<locked>>	96%	30545	69%	**11	100%
IMR 3031	<<locked>>	97%	37275	84%	**41	96%
IMR 4198	<<locked>>	85%	39755	90%	**76	99%
[IMR 8208 XBR]*	<<locked>>	92%	39537	89%	**95	92%
[Lovex D073.4]*	<<locked>>	87%	39639	90%	**85	93%
[Lovex D073.5]*	<<locked>>	89%	39392	89%	**99	93%
[Lovex D073.6]*	<<locked>>	97%	39639	90%	**64	94%
[Norma 201]*	<<locked>>	95%	39813	90%	**02	92%
Norma 202	<<locked>>	95%	39566	89%	**35	95%
ReloadSwiss RS 14	<<locked>>	97%	30661	69%	**64	100%
[ReloadSwiss RS 40]*	<<locked>>	88%	39494	89%	**02	94%
Rottweil R 901	<<locked>>	92%	39479	89%	**89	95%
[Rottweil R 902]*	<<locked>>	97%	39624	90%	**85	92%
SNPE Vectan SP 10	<<locked>>	85%	39668	90%	**28	95%
SNPE Vectan Tubal 3000	<<locked>>	92%	39784	90%	**36	95%
SNPE Vectan Tubal 5000	<<locked>>	97%	36564	83%	**87	95%
[Shooters World Match Rifle]*	<<locked>>	97%	39639	90%	**64	94%
[Somchem S321]*	<<locked>>	90%	39784	90%	**28	92%
Somchem S335	<<locked>>	93%	39508	89%	**62	96%
Vihtavuori N120	<<locked>>	83%	39653	90%	**40	100%
Vihtavuori N130	<<locked>>	89%	39392	89%	**53	99%
Vihtavuori N133	<<locked>>	96%	39682	90%	**66	98%
Vihtavuori N135	<<locked>>	97%	31067	70%	**38	95%
Vihtavuori N140	<<locked>>	97%	38841	88%	**89	95%
[Vihtavuori N530]*	<<locked>>	90%	39624	90%	**12	92%
Vihtavuori N540	<<locked>>	97%	38783	88%	**12	95%
[Winchester 748]*	<<locked>>	91%	39726	90%	**58	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2219	<<locked>>	81%	34722	78%	**17	95%
Accurate 2015	<<locked>>	81%	29762	67%	**59	95%
[Accurate 2460]*	<<locked>>	83%	32460	73%	**31	90%
[Accurate 2495]*	<<locked>>	81%	23540	53%	**61	91%
[Accurate 2520]*	<<locked>>	87%	30545	69%	**31	90%
[Accurate 4064]*	<<locked>>	90%	26774	61%	**52	90%
Alliant AR-Comp	<<locked>>	81%	26237	59%	**20	96%
Alliant Reloder-10x	<<locked>>	81%	32721	74%	**57	97%
Baschieri & Pellagri 106	<<locked>>	81%	35592	80%	**38	96%
[Hodgdon BL-C2]*	<<locked>>	91%	36332	82%	**79	90%
[Hodgdon Benchmark]*	<<locked>>	84%	33634	76%	**05	90%
[Hodgdon H322]*	<<locked>>	81%	29602	67%	**69	92%
[Hodgdon H335]*	<<locked>>	81%	33997	77%	**94	93%
Hodgdon TrailBoss	<<locked>>	81%	24062	54%	**60	100%
[IMR 3031]*	<<locked>>	85%	25599	58%	**93	90%
IMR 4198	<<locked>>	81%	34925	79%	**67	99%
[IMR 8208 XBR]*	<<locked>>	89%	35882	81%	**10	90%
[Lovex D073.4]*	<<locked>>	82%	32706	74%	**25	90%
[Lovex D073.5]*	<<locked>>	83%	32460	73%	**31	90%
[Lovex D073.6]*	<<locked>>	89%	30545	69%	**31	90%
[Norma 201]*	<<locked>>	91%	35346	80%	**03	90%
[Norma 202]*	<<locked>>	85%	28485	64%	**46	90%
ReloadSwiss RS 14	<<locked>>	81%	24004	54%	**03	100%
[ReloadSwiss RS 40]*	<<locked>>	81%	31720	72%	**08	90%
[Rottweil R 901]*	<<locked>>	81%	28935	65%	**20	90%
[Rottweil R 902]*	<<locked>>	93%	35607	81%	**97	90%
[SNPE Vectan SP 10]*	<<locked>>	81%	34969	79%	**17	93%
[SNPE Vectan Tubal 3000]*	<<locked>>	82%	28500	64%	**57	90%
[SNPE Vectan Tubal 5000]*	<<locked>>	86%	26382	60%	**08	90%
[Shooters World Match Rifle]*	<<locked>>	89%	30545	69%	**31	90%
[Somchem S321]*	<<locked>>	86%	34824	79%	**07	90%
[Somchem S335]*	<<locked>>	81%	27079	61%	**38	91%
Vihtavuori N120	<<locked>>	81%	36941	84%	**87	100%
Vihtavuori N130	<<locked>>	81%	31067	70%	**56	96%
[Vihtavuori N133]*	<<locked>>	81%	25788	58%	**05	92%
[Vihtavuori N135]*	<<locked>>	88%	23844	54%	**02	90%
[Vihtavuori N140]*	<<locked>>	86%	27760	63%	**00	90%
[Vihtavuori N530]*	<<locked>>	87%	35476	80%	**13	90%
[Vihtavuori N540]*	<<locked>>	88%	29341	66%	**66	90%
[Winchester 748]*	<<locked>>	86%	33997	77%	**10	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