instead of hijacking the other thread i will post this stuff here. this should clarify a lot to do with the scope adjusting and ranging questions a lot of people have.
as i said in the other post, first of all make you a rifle data book.. use this data book for the rifle/ammo combination it was made for and no other. if you have more than one rifle/ammo combination then make more data books for them and keep them with the rifle.. a data book can be just a small notebook like the one shown with the basic rifle data kit.
the basic kit consist of a data book, a small calculator to do your calculations, and an angle finder for accurately estimating the angled shot placement. you can buy the angle finders but i made mine. you can also use a construction angle finder, the kind that has the weighted dial and magnet so your can stick it to the underside of your barrel and note the exact angle of the rifle for your target.
in the data book you will write all your calculations for range, wind, angled trajectories, elevation, environmental factors, etc.. you will write down the range and corrections for that range. you will also write down into this data book how your rifle behaves during these conditions so you take 90% of the guess work out of the range and environmental corrections. also for tactical situations you will note the direction of the ambient light as this can have a bearing on your POI per certain zero of the rifle. as a rule of thumb, light up then sights up, light down then sights down..
write the range corrections down in the book..
on the ballistics card. this is a proper ballistics card. what the feds said Paddock had in his hotel room was not a range card, it was a half *** jotting of incoherent numbers that were not even correct.
but write the calculations down in the book:
if you are going to use this rifle/ammo combination for tactical use then it would also be a good idea to go around and measure everything you might encounter in a real world tactical environment so you can accurately range the distance. the things to measure would be thing like road signs, car rims per make and model of vehicle, 55gal drums, and other every day items. be as detailed as you can be.
items to sketch out and put in the book for tactical purposes..
but a tip on tactical usage.. when you are in your FFP or Final Firing Position you will range the area and sketch out the terrain in the back of the book and note things like land marks and other objects and write down that range in the book so that you do not have to do the calculations if a target of opportunity should arise. most of the time a target will only be available for a few seconds and there is not enough time to do the calculations again.
but hopefully this bit of information will help folks out and take care of a lot of the questions they have about how to properly use a scope system.
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