300 PRC vs. 308 Winchester: New Long-Distance Cartridge Aims To Dominate

The 308 Winchester has proven itself at the range and field, but the 300 Precision Rifle Cartridge (PRC) threatens its long-standing dominance. In this 300 PRC vs. 308 Win article, you’ll learn which option is better for your shooting preferences.

We’ll discuss the differences in recoil, trajectory, Ballistic Coefficient (BC), cost, and several other factors regarding how each cartridge performs on paper and in the real world.

Difference Between 300 PRC and 308 Winchester

Although these cartridges fire the same diameter bullet, they perform quite differently from one another. A cursory examination of their physical dimensions will help explain how.

Cartridge Specs

The 300 PRC’s parent case is the .375 Ruger, while the .308 Win is the .300 Savage. Both cartridges fire a bullet with a diameter of 0.308” and have a similar neck diameter (0.3410” for the 300 PRC; 0.3433” for the 308 Win).

The 300 PRC larger size becomes apparent when you observe its base diameter: 0.532”, as opposed to the 308 Winchester at 0.4709”. The 300 PRC’s case length is 2.58”, dwarfing the 2.015” long 308 Win case. The 300 PRC cartridge is nearly 1” longer than the 308 Winchester (3.7” 300 PRC; 2.8” 308 Win).

Its larger case grants the 300 PRC a higher case capacity: 77 grains H₂O, as opposed to 56 grains H₂O for 308 Winchester. The 300 PRC’s maximum pressure is 65,000 psi – 3,000 psi higher than the 308 Winchester’s 62,000 psi max pressure.

Let’s see how the cartridges’ different specs impact their performance relative to one another.

Recoil: 300 PRC vs. 308

I always compare recoil because it’s one of the first questions a shooter asks. We all want to know how much it kicks.

The less recoil you feel, the more accurate you can shoot. Less is always better (unless you’re a macho man who has to prove how tough you are to the world). Felt recoil is subjective. It varies shooter to shooter. That’s why we base our comparison on free recoil energy, an objective measure of recoil determined by four factors: projectile weight, propellant weight, muzzle velocity, and firearm weight.

The recoil energy of the 308 Winchester is about 17.5 ft-lbs of energy (when firing a 180 grain bullet at 2,610 fps from an 8 pound rifle). The recoil energy of the 300 PRC is about 36 ft-lbs (when firing a 212 grain bullet at 2,860 fps from an 8 pound rifle).

The 308 Winchester jumps out to an early lead because it has less than half the recoil of the 300 PRC.

Trajectory

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A bullet’s trajectory is the path it takes upon exiting the muzzle. We measure trajectory in terms of bullet drop and rise, as it resembles an arch, as gravity begins pulling on the bullet when it leaves the barrel.

A flat trajectory is preferred for firing across longer distances, as it requires the shooter to make fewer adjustments to remain accurate.

A cartridge’s trajectory varies from load to load, so the following scenarios are generalizations.

A 300 PRC 212 grain ELD-X bullet drops -38.3” at 500 yards when sighted in at 200 yards. A 190 grain CX bullet drops -36.0” at 500 yards when sighted in at the same distance.

A 308 Winchester 150 grain FMJ bullet drops -47.2” at 500 yards when sighted in at 200 yards. A 180 grain Trophy Bonded Tip drops -51.1” at 500 yards when sighted in at the same distance.

The 300 PRC has a flatter trajectory than the 308 Win. It wins this section and ties things up.

Accuracy: 308 Win vs. 300 PRC

The 308 Win and 300 PRC are incredibly accurate cartridges. Match grade loads with Sierra MatchKing, Hornady ELD-X, and Berger VLD Target bullets will give you sub-MOA (minute of angle, where 1 MOA = 1″ at 100 yards) accuracy.

It’s crucial to remember that accuracy is more often a function of the shooting platform and the shooter than it is of the cartridge. The ammo and rifle pairing, environmental conditions, trajectory, recoil, and shooter all play vital roles in determining how much accuracy a cartridge can exhibit.

For the sake of argument, we’ll only consider the cartridges’ trajectories and recoil. That makes this section a tie, as the 300 Winchester has less recoil, but the 300 PRC has a flatter trajectory.

Recoil-sensitive shooters should choose the 308 Win. Shooters looking to get maximum distance (and who have little concern for recoil) should choose the 300 PRC.

Ballistic Coefficient

Ballistic coefficient (BC) measures how effectively a bullet resists wind drift and air resistance. It’s a numeric representation of how aerodynamic a bullet is. A higher BC is preferred, as it indicates the bullet will resist wind deflection better.

Generally, a heavier, sleeker bullet has a higher BC, as it takes more force to disrupt its flight than it does a lighter, blunter projectile.

The 300 PRC is explicitly designed to fire heavier bullets. Despite both cartridges firing .30 caliber bullets, the 308 Win lags behind in BC.

The 308 Winchester has a G1 BC ranging from .350 to .500. The 300 PRC has a G1 BC ranging from .600 to .800, which is a relatively high ballistic coefficient. It’s comparable to many 338 Lapua Magnum cartridges, an elite sniper round.

The 300 PRC takes the lead by having a higher BC than the 308 Winchester.

Barrel Life

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For the average hunter, barrel lifespan is irrelevant. They simply won’t fire enough ammo for it to matter. However, it can become a significant factor for precision shooters who spend a lot of time at the range.

The 300 PRC’s barrel life is about 1,600 rounds. You’ll likely notice your accuracy and consistency dropping if you exceed this number. The 308 Winchester’s barrel life is about 3,000 rounds (some shooters claim to get 5,000+ out of their 308 Win barrels).

The 308 Winchester wins this section, as its barrel lasts much longer than the 300 PRC’s.

Stopping Power: 300 PRC vs. 308 Win

“Stopping power” is difficult to define. It means different things to different shooters. We could argue about the exact definition until we’re blue in the face.

To further complicate the issue, shot placement is more important than stopping power. A poorly placed shot from a cartridge with more “stopping power” can be less effective than a well-placed shot from a weaker round.

For the sake of time, let’s agree that penetration depth, size of the hole created (aka wound column diameter), and kinetic energy transfer are the primary factors which determine stopping power.

Considering this, the 300 PRC has more stopping power than the 308 Win. It fires the same diameter projectiles, but they’re heavier and maintain more energy downrange.

The 300 PRC wins this section because it has more stopping power, regardless of your definition of it.

Hunting

The 308 Winchester is a legendary big game hunting cartridge. It is known for taking whitetail and mule deer, elk, bear, and most other North American big game animals.

The 300 PRC is a relatively new cartridge designed for long-range hunting. It can ethically take mule deer, elk, moose, and bear.

Both cartridges are versatile and capable of ethically harvesting various large game animals. However, the 300 PRC is typically overkill for medium game, whereas the 308 Win will not damage as much meat with a well-placed shot.

This section is still a tie, as it ultimately depends on the species you’re hunting. Long-distance hunters prefer the 300 PRC, whereas hunters who take shots within 300 yards (especially on medium-game animals) tend to prefer the 308 Win.

Cost & Availability

When purchasing a new cartridge, I consider the overall cost and availability of factory ammo and rifles.

Because the 300 PRC is still very new compared to the venerable 308 Winchester, ammo selection will be lower, and prices will be significantly higher. This is partly because the 300 PRC is a 30-caliber magnum cartridge, which requires more raw materials for its manufacture.

300 PRC bolt-action rifles are more expensive and less abundant, as they are more niche than 308 Winchester rifles.

The 308 Winchester wins this section. Factory ammo costs less and is more abundant.

Reloadability

Reloading is an excellent way to craft the perfect round for your firearm and save a little money on factory loads. Most people are deterred by the initial investment in supplies and equipment. However, you can create higher-quality ammo for less, and enjoy total control over most of the process.

There are a lot of information and supplies for reloading the 308 Winchester; less so for the 300 PRC. While the 300 PRC doesn’t have as much information and supplies as the 308 Win, it can still be reloaded, making this section a tie.

Continue reading more about 300 PRC vs. 308 Winchester: New Long-Distance Cartridge Looks To Dominate.

Source: https://freedombunker.com/2024/12/21/300-prc-vs-308/