Okay, so you don't own one, a 308SBR, but you're trying to compare YOUR issue to his. And, you have zero relative basis.
Zero.
But you thought you'd make it all better, by telling what your 243, 20" barrel did. And it doesn't compare, not even slightly.
That's like telling a guy how your Barrett 50BMG is doing when he's asking about a problem with his Ruger 10/22 - literally.
Oh, and a pic of my rifle collection would embarrass you. You know, since we're comparing dick size and rifle-problem-diagnosis-experience on the pictures of our rifle collection...