The .308 Marlin Express is a new cartridge developed by Marlin Firearms and Hornady. It is based on the .307 Winchester with a goal to duplicate .308 Winchester performance. The

The .308 Marlin Express is a new cartridge developed by Marlin Firearms and Hornady. It is based on the .307 Winchester with a goal to duplicate .308 Winchester performance. The cartridge uses a slightly shorter, rimmed case to function in lever action rifles. As introduced in Hornady's LEVERevolution line of cartridges, it is the highest velocity production cartridge designed for lever action rifles with tubular magazines.

 The table below shows how the rounds compare. Note that reloading data for 160-grain (10 g) bullets for some of the cartridges is not available. Extensive loading data for the .308 Marlin Express is not yet available. This round was designed with a polymer tip, so that the .308 designed would be safe for the tubular magazine of lever action rifles. This softer tip eliminates the hazards of stacking pointed rounds end to end in a tubular magazine. (yes but lousy armour-piercing)

.308 Marlin Express comparison

Cartridge	Bullet Weight	Muzzle velocity	Muzzle energy
.308 Marlin Express	160	2660	2513 [1]
.30-30 Winchester	160	2300	1880 [2]
.307 Winchester	150	2693	2416 [3]
.307 Winchester	160	2675	2540 [4]
.307 Winchester	170	2570	2494 [3]
.308 Winchester	150	2809	2629 [5]
.308 Winchester	160	2770	2720 [6]
.308 Winchester	168	2712	2744 [5]
.300 Savage	150	2765	2547 [7]
.300 Savage	160	2505	2230 [8]
.300 Savage	170	2676	2624 [7]