I would agree with Jack, the .270 with a 22" barrel is ideal, especially as a Sheep rifle.
I don't know how Warren Page suffered a 22" barrel on his 7mm Mashburn, but he was an ace , too.
JOC and Page were in agreement about this.
Didn't Warren say?"That he was a hunter not a pole vaulter"
Sheep hunters prefer carbine style rifles, and have been known to skelatonize their gear.
Lord knows, I have.