At Texas Monthly, we pride ourselves on keeping up with nearly all the barbecue happenings in the state. When a new joint opens up, we usually hear about it quickly. As we researched for our upcoming top fifty barbecue list, we made a point of getting to as many new spots as possible, but we missed one that requires your attention. Jeremy Staggs opened Boxcar BBQ, in Lufkin, back in 2023, but I only had the pleasure of my first visit there last week.Deep East Texas isn’t where Staggs expected to open a business. He spent most of his life along the Coastal Bend. After graduating from Port Aransas High, Staggs served in the Marine Corps. “I got out of the Marine Corps in 2006…