broadhead vs. field point flight
#4

Well there is a lot of truthto what 360 says, A well tuned bow will shoot a broadhead very good. But to say they will all fly like fieldpoints is a bit misleading. You'll need to practice and see which heads fly well for you.
Generally the smaller the diameter of the head the better it will fly, but you sacrifice cutting diameter. So you want to find the middle ground. Is durability important? Price? Replaceable blades? Ease of assembly? There are plenty of great heads out there both fixed and expandable. Have your bow well tuned and find what you like best. Muzzy, G5's, Slicktricks...there is a plethra of good choices available.
Generally the smaller the diameter of the head the better it will fly, but you sacrifice cutting diameter. So you want to find the middle ground. Is durability important? Price? Replaceable blades? Ease of assembly? There are plenty of great heads out there both fixed and expandable. Have your bow well tuned and find what you like best. Muzzy, G5's, Slicktricks...there is a plethra of good choices available.
#5

what EXACTALLY is a "tuned" bow? what makes it tuned??
#6

You need to sight your bow with the broadheads before hunting.. Yes a properly tuned bow will typically shoot a broadhead the same.. But type of broadhead has something to do with it also. My brothers bow shoots Nap heads like 6 inches off but shoots Strikers right on the money..