Shoot and practice as much as possible a 100 and 400 yds and you won’t have many surprises in the field. Bench,sticks, and offhand Even dry firing helps a lot. Don’t know of a bad 375 bullet. Shot a big bull at 430 yds with 300 a frame. Don’t worry about the about the old 375 if you do your part. Practice, practice, practice builds muscle memory and confidence when that big bull is going over the hill. Ain’t rocket science. Happy Hunting