I wouldn't say that I am good enough to make consistent cold-bore hits at 1K+ with the 308 launching 225s or any other bullet, day after day, month after month.
Few people could back up that claim, regardless of their rifles chambering or load.
For conversation, here is a pic of a target I shot with 208s, at 2480 fps via RL15. Range was 1120 yards. I needed two shots to get on steel that day, as I recall. After that I put six consecutive hits with .722 moa precision. The steel target is 15" wide by 25" tall.
Point being, the 308 has the ballistics to get there with accuracy, especially with a bullet with a BC in the .6's.
Reading and adjusting for conditions is the art of LR, and the 308 makes it a challenge that I enjoy.