Okay, so today was my first time shooting my new rifle unsupported. Yesterday I zeroed it on the bench rest, and was getting off perfect groupings in the bullseye, meaning I could only see one hole. Today, I'm only getting it even in the black like 75% of the time, and only about 20% are bullseyes, and groupings are rare. How long does it take to get used to a new rifle? Or is it just a bad day?