Strip it, clean and lube it, take a box of targets and a box of ammo and head for the range. When the box of ammo is empty, go home, clean the gun and repeat as often as possible. It's a quality gun with a quality barrel and what you need is trigger time practicing those long shots. You will have more fun and the gun if it needs breaking in like trigger parts wearing in and smoothing out it will happen without you noticing much. At least that's how us dinosaurs do it.