First time reloader, not used the rifle before. Half way through working up I start to get this: first Photo. Going back to lower power loads I used for initial zero, similar problem; 2nd photo. What's causing this?
Hard to get phone to focus on the cases but you get the idea.
That looks like you had something in your chamber - a strand of cotton off a patch will do that - or a pine needle etc.
Scrub out your chamber & try again. - Probably nowt to do with the fact that it's a reload.