The question of whether a 6.5 Creedmoor is "bigger" than a .308 Winchester is nuanced. It depends on what aspect of "bigger" you're considering: overall cartridge dimensions, bullet diameter, or the impact of the round. Let's break down each element:
Cartridge Dimensions: A Side-by-Side Comparison
When comparing the physical dimensions of the cartridges themselves, the .308 Winchester is slightly larger in overall length and case capacity. However, the 6.5 Creedmoor's case is longer and slightly narrower.
-
.308 Winchester: This cartridge boasts a slightly larger case diameter, resulting in a greater powder capacity, theoretically allowing for potentially higher pressures and velocities with certain powder loads.
-
6.5 Creedmoor: While possessing a longer case, its smaller diameter leads to a slightly less expansive powder capacity compared to the .308 Winchester.
Therefore, a direct answer of "bigger" isn't straightforward. One is longer, the other wider; it depends on which measurement you're prioritizing.
Bullet Diameter: A Key Difference
The most significant difference lies in the bullet diameter. The name itself hints at this:
-
.308 Winchester: Has a bullet diameter of approximately .308 inches (7.82 mm).
-
6.5 Creedmoor: Has a bullet diameter of approximately .264 inches (6.7 mm).
In this regard, the .308 Winchester has a definitively larger bullet diameter.
Ballistic Performance: A Matter of Application
While case dimensions and bullet diameter offer insights, ballistic performance is a more useful comparison for most shooters. Both cartridges are known for their accuracy and relatively flat trajectories, but they cater to different applications:
-
.308 Winchester: Its larger bullet diameter provides greater stopping power and is commonly chosen for hunting larger game. The greater powder capacity in some loads translates to more energy downrange.
-
6.5 Creedmoor: Its smaller, more aerodynamic bullet often results in superior long-range accuracy and less wind drift. Its lighter recoil makes it preferable for precision shooting and extended shooting sessions.
The Verdict: No Single "Bigger"
There is no single definitive answer to whether a 6.5 Creedmoor is bigger than a .308 Winchester. The answer depends on the specific aspect being considered. The .308 Winchester has a slightly larger overall cartridge dimension and a substantially larger bullet diameter, resulting in greater stopping power. However, the 6.5 Creedmoor's longer, narrower case and smaller, more aerodynamic bullet provide superior long-range accuracy. The "best" cartridge depends entirely on the shooter's needs and intended application.
