Any thoughts on barrel break-in?

She's set up with a Bushnell Holosight, co-witnessed with iron sights. I suspect it's the Rock River "Dominator" EOTech mount, but I'm honestly not sure now. My point being that she's not initially concerned about "across the course" type of accuracy.

I'm leaning toward just giving it a good initial cleaning and then shooting it...

They picked up 200rds of Federal PowerShok 50gr at WalMart to get started. I'm trying to convince them to buy a case of Black Hills remanufactured 55gr while it's on-sale at MidwayUSA.

Mike