7 PRC barrel length vs velocities?

[johnstonblake]

I know it's a newish round, but does anyone know what the velocity differences would be on a 7PRC between 22", 24", and 26" barrels?

 

[alpine_troop]

There’s a video on YouTube by Hill Country Rifles that will show you. Search Hill Country Rifles 7 PRC to find it. They built three rifles with three barrel lengths and shoot factory loads over a chrono