Hornady black 105 hpbt swipes

[Pwoller]

I was hoping it was jamming in the lands when I first noticed it. It’s not though. It was 80 one day and 50 the other. I can’t figure it out. I tried some hand loads with benchmark and 70 grain nosler bts. Did a ladder and started seeing swipes around 28.6 grains. I tried smoothing the ejector hole, buffer weight changes and tuning the gas as low as possible but still getting swipes.

I’m loading up a ladder with 8208 and 70 bt my plan is to shoot it unsuppressed. I can’t figure out if it’s high pressure I’m seeing or something wrong with the gun. It’s a 18 inch proof barrel and a maxim bolt.