I'll second the "you have to practice" voices. I recently got a range to shoot to 400. Been shooting at 200 prior. All I can say is the first time at 400, same gun, bullet, scope, rest everything, was an eye opener, those 3 inch groups at 200 blow WAY UP. Heck between a 24 inch drop, add a small wind and we had trouble hitting an 8 inch gong.

Not sure if it was the bullet just sort of drifted at that distance, or the trigger puller, but groups opened up WAY MORE than what I thought.

Given that, I'm happy to shoot animals at 200 but would even try an elk at 400.