* Make sure your gun is clean when calibrating * Use high-quality ammo, not corrosive, bad-burn crud * Go to an indoor range, you want to remove weather as a possible factor (humidity, wind, etc.) * Use a sandbag. Some people use tripods, other stands, etc., but a good, old-fashioned sandbag steadies the shot very well and absorbs more of the kick with less movement than any other device I've seen. * Start with small distances and work your way up. Don't go more than 20 yards until you're spot-on with your site. This will make sure that you have a consistently accurate weapon, instead of one that can't hold it's site.

Bore sight your rifle. (Optional, but convenient) Find a steady rest (sandbag, stack of newspapers, etc), set your target at 50 yards, if you were able to have it boresighted, 20 if you were not able. Fire 1 careful shot. If it is on paper (it doesn't matter how close to the bullseye) fire 2 more shots at the exact place you aimed the 1st time. You are looking for a grouping. Measure the distance of the group vertically and horizontally from the bullseye, and adjust the scope accordingly. Your clicks will most likeley be quarter minute of angle (1/4" at 100 yards). If you fired a 3 shot group at 50 yards, and your group missed the bullseye 2" low and 3" to the left, you will adjust the windage 24 clicks to the right, and 16 clicks up... Remember, you are dealing with minutes of angle... Missing the bullseye 2" at 50 yards means you will miss by 4" at 100 yards, so adjust as if you missed by 4"... Now fire another 3 shot group (carefully. Breathe, Relax, Aim, Squeeze, Surprise) you don't want to be jerking around, or you will not get a group good enough to make a dope change (a dope change is a sight adjustment). You should be grouping close enough to the bullseye to move the target out to 100 yards. Fire a 3 shot group at 100 yards, and measure the groups distance from the bullseye. Now you will only adjust 1 click per quarter inch. Depending on the trajectory of your cartridge (what is it, by the way?) you will want to sight in so that your group is perfectly in line vertically, but strikes an inch or so over the bullseye. I would assume with a red dot scope that you won't be shooting much beyond 150 yards, nor will you be doing precision shooting, so this will be a perfect setting for hunting. (I am not trying to be offensive, or arrogant with the "precision shooting" remark, I am merely saying that you won't be trying to shoot 1 hole groups groups at a 1" square at 250 yards with a red dot scope). Red dot scopes are very nice to hunt with, as they tend to be parallax free, so you don't have to worry about eye relief, or stock weld as much as you do with a traditional reticle. The bottom line is to have fun.