During the last thirty years, I've been all over that.
My primary rifle is a .280 Ackley and THE barrel length is 24-inches. A twist-rate of 1-10" is fine because field experience will eventually prove to you that any bullet over 154-grains is folly.
Steve
Steve was a tremendous resource for me when I built mine. I went 24" per his recommendation and don't regret it one bit.
