338 Lapua vs. 50 BMG: Which Is the Better Extreme Long-Range Cartridge?

These two military rounds take long-distance shooting to a new level: the 338 Lapua Magnum and the 50 BMG.

The 50 Browning Machine Gun (aka 50 BMG, .50 cal, 50 Browning, or 12.7x99mm NATO) was designed for anti-materiel applications and is the longest-serving centerfire cartridge in the U.S. military (excluding the 30-06 Springfield, which is still used on ceremonial occasions). The 338 Lapua Magnum is a relative newcomer to the long-range shooting scene but has become a favorite of many snipers.

Although initially developed for military use, the 338 Lapua Mag and 50 BMG have both won popularity for long-range hunting and F-Class shooting competitions. Let’s evaluate the 50 BMG vs. 338 Lapua to help you understand the differences between the two rounds and give you a clearer idea of which is better for your long-range shooting needs.

What Is the Difference Between .50 Cal and 338 Lapua Magnum?

The key difference between 50 BMG and 338 Lapua Magnum is this: the 50 BMG is the larger cartridge and accordingly fires a larger, heavier bullet with more kinetic energy. Although the 338 Lapua has considerably less case capacity than the 50 BMG, both rounds share similar muzzle velocities.

338 Lapua vs. 50 BMG Cartridge Specs

Perhaps the most obvious difference between these two rounds is their size.

338 Lapua vs. 50 BMG Recoil

The 50 BMG’s massive case capacity and projectiles come at a cost: massive recoil. That’s a major reason why many shooters prefer the smaller 338 Lapua for more applications.

It is impossible to perform a pure apples-to-apples recoil comparison on these cartridges, as they are fired in very different firearms. That being said, we can objectively compare the rounds’ free recoil, which is a product of four factors: muzzle velocity (fps), propellant charge weight, bullet weight, and firearm weight.

For 50 BMG, we will consider the Barrett M82 semi-automatic sniper rifle, weighing a whopping 32.7 pounds. For the 338 Lapua, a McMillan TAC-338 bolt-action rifle weighing 13 pounds.

For ammo, we will compare the military’s standard-issue 50 BMG M33 ball 660 grain FMJ (2,910 fps muzzle velocity) and Lapua’s 338 Lapua Mag 250 grain Lock Base FMJ (2,952 fps).

Given these parameters, the 338 Lapua generates 36.5 ft-lbs free recoil energy; the 50 BMG, ~82.7 ft-lbs. (To put these massive recoil numbers in perspective, an average 308 Winchester load produces ~20 ft-lbs of free recoil.) In no uncertain terms, the 50 BMG has more than double the recoil of the 338 Lapua Mag.

The amounts of recoil produced by the 338 and the 50 BMG are so excessive that virtually every rifle chambered for either comes with a factory-installed muzzle brake. Without it, most shooters would not be able to fire accurately.

Some expert long-distance shooters will tell you that the recoil of these rounds is manageable, although that comes from years of training and acclimatization. Learning to fire these cartridges accurately takes time, as their recoil can easily cause inexperienced (and even experienced) shooters to flinch.

Most shooters understand what they’re getting into when they make the decision to purchase a 50 BMG rifle. If you aren’t already experienced with it, then it would be wise to consider professional training to learn how to handle such a mighty round’s recoil.

338 Lapua vs. 50 BMG Ballistic Coefficient & Sectional Density

Ballistic coefficient (BC) is a measure of how aerodynamic a bullet is and how well it resists wind drift.

The 50 BMG has some of the highest BC values among centerfire rifle cartridges, with heavier bullets exceeding 1.000 G1 BC. The 750 grain A-MAX has a G1 BC of 1.05, while the 660 grain FMJ has a BC of 0.701. In comparison, the 250 and 300 grain 338 Lapua loads compared earlier have G1 BCs of 0.625 and 0.720, respectively.

Sectional density (SD) reflects a bullet’s capacity for penetration based on its weight and diameter.

Narrower bullets typically have an advantage in SD, as they can focus more of their energy on a narrower area. However, the 50 BMG’s bullets are so much heavier that they brute force their way to higher SD values.

The 50 BMG 750 grain A-MAX has an SD of 0.412; the 660 grain FMJ, 0.357. In contrast, the 338 Lapua 300 grain AccuBond has an SD of 0.375, falling between the two .50 cal rounds.

338 Lapua vs. 50 BMG for Hunting

The 338 Lapua and 50 BMG affirmed their long-range shooting capabilities during the recent wars in Iraq and Afghanistan. However, their use for big game hunting is a relatively new development.

There’s no question that 50 BMG ballistics are impressive. No animal on the planet can stand up to it.

However, the .50 cal has several downsides for hunting.

The first major issue with using the 50 for hunting is rifle weight. Most hunters would shy away from carrying a 30+ pound rifle into the woods. If you plan on toting a Barrett around, then you’d better start hitting the gym.

Although the 50 BMG’s heavy rifle is an issue during long hikes, it is needed to curtail the round’s punishing recoil.

Some hunters also criticize the use of a 50 BMG for hunting large game due to the lack of expanding bullets available for the cartridge. This is somewhat of a moot point, as a 0.510″ diameter bullet inflicts more than a large enough wound channel to ethically harvest large game. Its extraordinary striking power does not hurt its case.

Read the full breakdown here → https://ammo.com/comparison/338-lapua-vs-50-bmg

Source: https://freedombunker.com/2026/04/25/338-lapua-vs-50-bmg/