Trajectory Question

[Wannabe]

If I sight a .270 to zero at 100yds. Then shoot a target at 100 yds, that is at a 10% downhill grade. where whould the bullet hit? 100yds. up hill?

 

[mr.big]

close enough to not even think about it,

 

[Wannabe]

Then let's talk 200 - 300 - 400 ...

 

[Wannabe]

The problem with not worrying about it is the extended ranges of 200, 300, 400, 500...

 

[Nhill]

The yardage does not matter, only the slope.

Angles 10 or less do not make any noticeable difference.

For angles greater than 10 degrees:
Multiply the slant range by .97 for a 15 degree angle
.87 for a 30 degree angle
.71 for a 45 degree slope.

For example if you had a 350 yard shot at 45 degrees, you would multiply 350*.71 and get 248.5. You would treat that shot as a 248.5 yard shot. It works the same for up or down hill slopes, you will hit high either way.

I don't quite understand it all,but that is what my ballistics book says.

 

[FULLDRAWXX75]

Slightly long read, but explains the whole thing pretty good..........

http://www.exteriorballistics.com/ebexp ... 5th/33.cfm

FDXX75

 

[Wannabe]

Thank you Fulldraw. That is exactly what I was looking for.