First off like others said clean it inside and out. Start at 25 yards, since boresighting is usually done for 25 yards. Adjust so your POI (Point of Impact) is about 1/2" low of bull, dead centre. Shot 2 shot groups before making adjustments, if you have a flier in on the 2 shots shoot a 3rd. Less chance to chance the bull around. Like said allow cooling time. Then move to 100 I would personally sight it in to your shooting distances. If 200 is the norm that 1 and 1/2 high at 100. If 100-150 is max than 1" high at 100. If 100 is the norm zero at 100. When you have it sighted in, take it home and clean it again, inside and out. Then head back to the range to make sure it is where you want it to be for hunting. On final sight in I shoot 1 five shot group and don't touch my bore for hunting season. Unless it is required, such as rain or dirt. I clean my exterior and lub often during season. Once season is over I clean the gun completely. I use wire brush, then a patch with bore cleaner, run dry patches till clean, then place a light oiled patch (remoil or the likes), lubricate and pack it away. Put a tag on it to run a patch througfh the bore before shooting, until you get the hang or if you have several guns.

Good to go!

Have fun with your gun and good luck. PS I am not much for the scope but I would use and see before you trash it.