Well I think this rifle is starting to settle down. I knew I was in for some frustration trying to use superformance, which has a track record of being finicky, and some 142gr Nosler ABLR, but it's what I've got. I'm 105rds thru this barrel now and the action has slicked up some and the barrel is easy to clean. Mine handles pressure very well and seems to shoot tighter the higher I go. Switched from Winchester primers to CCI and the fliers went away. I wanted to give superformance a go since, if you can find a load, it will be easily 100-200fps faster than anything else and with a short barrel that helps. I shot a few with my suppressor off and lost about 30fps.