Your rifle looks to be doing well.
20" Grendels are a pleasure to shoot (not that other lengths aren't). I get decent velocity without having to dance near pressure signs, and the rifles just swing so naturally when hog hunting off of shooting sticks. I liked my first so much, I built a second.
I went with Wilson Combat barrels... Definitely not premium either, but they shoot sub-minute consistently with target loads, and not much over that with just about every hunting bullet I've put through them.