.458 Lott Load Data & Reloading Guide

Rifle

Also known as: .458 Lott Magnum, .458 Lott Express, .458 Lott Rimless

About .458 Lott

The .458 Lott caliber was developed in 1971 by Jack Lott to address the shortcomings of the .458 Winchester Magnum in certain dangerous game hunting scenarios. Specifically, Lott designed this cartridge to provide greater stopping power and reliability when faced with large, potentially dangerous animals such as Cape buffalo and elephants. With its roots in modifying belted magnum cartridges, the .458 Lott offers an extended case length of 2.8 inches compared to the .458 Winchester Magnum's 2.5 inches, allowing for increased powder capacity.

Technical characteristics of the .458 Lott include a case diameter of .513 inches and a neck diameter of .481 inches, with a large rifle primer typically used for ignition. The caliber is renowned for its ability to deliver high muzzle energy, with some loads reaching up to 6,000 foot-pounds. Typical bullet weights range from 350 to 600 grains, with the 500-grain bullet being particularly popular for hunting thick-skinned game. This larger projectile enhances penetration and ensures maximum damage on impact.

Ballistically, the .458 Lott provides excellent performance at ranges up to 200 yards, beyond which the trajectory begins to drop significantly. Recoil is substantial, necessitating a robust rifle platform and awareness from the shooter. Despite the recoil, its power and reliability make it a favorite among professional hunters and guides in Africa. The .458 Lott can handle a wide variety of bullet types, including solid, soft-point, and expanding projectiles, further enhancing its versatility in hunting scenarios.

For reloaders, the .458 Lott offers the advantage of flexibility in tailoring loads to specific needs, whether maximizing power for large dangerous game or moderating recoil for better control. Handloading also permits the use of different bullet compositions and weights to achieve optimal performance for specific game or conditions. Given its large case capacity, reloaders can experiment with various powders to fine-tune velocity and pressure according to personal preferences and rifle characteristics.

Technical Drawing

.458 Lott technical drawing and load data

Technical Specifications

Maximum Pressure:62366 PSI / 4300 bar
Case Volume:110 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Safety Standard:C.I.P.
Bore Area:104.94 mm²
Barrel Diameter:0.458" / 11.6 mm
L3:2.8" / 71.1 mm
L6:3.6" / 91.4 mm

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Brass Case Capacities

The following table shows the case capacity (Grains of Water) for brass in cartridge .458 Lott where we have data (number of datapoints in brackets).

Hornady (1)108.3

Standard Load Data — .458 Lott

Select your desired cartridge and bullet weight below to access the corresponding load table. From there, you can choose any listed load recipe and transfer it directly into the ballistics calculator for further refinement, optimization, and precision tuning.

All
250 gr
300 gr
325 gr
330 gr
350 gr
390 gr
400 gr
405 gr
420 gr
450 gr
475 gr
480 gr
500 gr
510 gr

Community Loads — .458 Lott

Here are some popular loads for .458 Lott:

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BulletPowderBarrel (in)Charge (gr)Case Volume (GoW)OAL (in)Max. Pressure (psi)Muzzle Velocity (fps)
.458 | 260gr | CutEdge HG (260gr)
Allian
Reloder-7
26.075.0100.03.6051,256 (82%)2887
.458 | 260gr | CutEdge HG (260gr)
Hodgdo
H4198
26.075.0100.03.6054,288 (87%)2881
.458 | 350gr | Hornady InterLock RN (350gr)
23.684.0110.03.5540,039 (64%)2451
.458 | 350gr | Speer Hot-Cor (350gr)
23.6••.•110.03.5540,719 (65%)2454
.458 | 350gr | Speer Hot-Cor (350gr)
23.6••.•110.03.5544,023 (71%)2451
.458 | 400gr | Speer Soft Point Flat Nose (400gr)
Hodgdo
CFE223
24.0••.•110.03.5554,282 (87%)2602
.458 | 400gr | Speer Soft Point Flat Nose (400gr)
24.0••.•110.03.5550,244 (81%)2451
.458 | 400gr | Speer Soft Point Flat Nose (400gr)
24.0••.•110.03.5550,969 (82%)2451
M.458 | 400gr | Speer Soft Point Flat Nose (400gr)
24.0••.•110.03.5556,194 (90%)2448
.458 | 400gr | Speer Soft Point Flat Nose (400gr)
24.0••.•110.03.5546,504 (75%)2398
M.458 | 480gr | Hornady DGS (480gr)
Vihtav
N140
24.0••.•96.03.5457,957 (93%)2185
M.458 | 480gr | Hornady DGS (480gr)
Vihtav
N140
22.0••.•96.03.5457,957 (93%)2152
.458 | 480gr | Hornady DGS (480gr)
Vihtav
N530
22.0••.•96.03.5555,579 (89%)2149
M.458 | 500gr | North Fork Percussion Point (500gr)
25.0••.•110.03.6559,422 (95%)2211

Frequently Asked Questions

The maximum pressure for .458 Lott is 62,366 psi | 4,300 bar.

.458 Lott typically uses a Large Rifle Magnum (LRM) primer.

The case capacity of .458 Lott is approximately 110 grains of water (H₂O).