You will want to sight in using sandbags or some sort of rest. It does not need to be fancy- but you need to be comfortable so you can take your time. A solid (non wobbly) bench is more important in my opinion. Rest the middle of the fore end of the gun on the rest- not your hand- and do not let the barel itself touch anything.
You will want to be sighted in at each of the animal distances-
-----------------Meters-------------yards--------------------feet----in
Chickens---------40----------------43.75--------------------131 ---2 13/16
Pigs----------------60----------------65.6 --------------------196-----10 3/16
Turkeys ------------77 -------------- 84.2---------------------252------7 1/2
Rams--------------100----------------109.4---------------------328------1
This is why you want target type turrets on the scope. It is possible to "hold over" or under- but there is a reason you do not see many do it that way.
Mounting of the scope is very important. Most people will simply get rings of the height they want and mount the scope. You can also have rings made to your specifications- but your money will be better spend elsewhere. I would suggest getting a pair of the BKL rings- or the Burris Signature rings (and spend the extra money for a set of the offset inserts.)
The simple way to boresight is to take the bolt out of the gun, look down the bore and look for something distinctive in the middle of the circle you see. Without moving the gun you then adjust the crosshairs to the same thing you were seeing. Then go back and double check. This will get you close. You can do this at home- but doing it inside will cause elevation problems at the range as the distance is too short. Start at the range with a close distance and good backstop, and then work your way back in distance.
If you want to be more (very?) particular- before mounting the scope you find its "center". What I do is take a small cardboard box and cut two V notches in it so the scope rests in them but can be spun. You then adjust the elevation and then the windage so the dot or crosshairs stay the the same place. The only way to know this is to be able to look at something at the time. It is best to have the cap on the the knob you are not adusting at the time. It can get rather confusing otherwise
Centering the scope ensures you are making your adjustments starting from the middle of the scope- where it will be optically the best and the adjustments most consistent.
After the sope is "centered" mount it on the gun- but do NOT bore sight it. Take it to the range and shoot it. What you want to do is shim the scope mounting so the "centered" scope corresponds with where the bullets hit at the turkey distance. You use the turkey distance as it is close to the center of the total adustment range you will use going from chickens to turkeys. You will not get it exact- but get it with in several "animals" if possible. The Burris Signature rings are not an ideal fit on the dovetail- but they will work. Their big advantace is that by using the offset inserts in the right combination you can make significant changes in elevation and/or windage. When Burris first came out with these they came with a set of the offset rings and a chart showing MOA changes for different combinations. Now you have the buy the offset rings- and the information they provide is not as complete. My guess is it was too complicated for for their average customer.
The last suggestion I have is to go to this web site and print out targets:
http://www.curragh.com/silhouette/targe ... _rifle.pdf
They have an MOA grid on the background- which is very helpful to learn how many "clicks" you need to get sighted in.
The other web site I would suggest is:
http://www.incompetech.com/beta/plainGraphPaper/
This site allows you to design your own graph paper and print it out. I have printed out graph paper sized to be 1 MOA for the different distances. Again- very handy for sighting in. The program they have wants to know the lines per inch for the distances. I have calculated those out below
------------------1 MOA--------- lines/inch
Chicken--------0.45810----------2.183
Pig--------------0.68714----------1.455
Turkey----------0.882------------1.134
Rams------------1.1452----------0.873

And you thought it was overwhelming
before this post
The main thing is to get set up and go shoot and have fun. I would not worry about the "centering" at this point
unless you find you do not have enough adjustment range in the scope. In that case I would first try reversing the mounts, front to rear, unless you have the burris Signature rings.