Thread: Is it Pressure or Powder Capacity?

Originally Posted by Micky Duck

or.... run your 308 with 150grns at 3000fps VS doing it with a bigger cartridge ......your 308 will be straining everything to achieve it.....the bigger cartridge can do it with ease...

Simplification:
Heavy and slower is easier on the barrel, ok short range, and better far downrange.
Light and fast is hard on the barrel, excellent at short range, but loses it far downrange.
So once you have a rangefinder and can cope with rainbow trajectories no need for maximum velocity obsessing.