25 yds and adjust scope to target.You need to shoot as much as possible with any gun you want to be accurate with,100's of rounds.I don't have a boresighter i usually pull my bolt out , place rifle on or in something sturdy. I get the rifle bore fixed on an object (Where rifle won't move)it's usually a light switch inside the house 50-60 feet away then, i adjust my scope to hit the light switch! How do some of you get on paper without boresighters , when you get a new rifle. I"m going 300win mag this year and really don't wanna shoot no more than i have to.