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Old 01-20-2007 | 10:40 PM
  #3  
dmurphy317
Nontypical Buck
 
Joined: Aug 2005
Posts: 1,081
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From: New Mexico
Default RE: Climbing trajectory

"I'd like to be flat out to 100"

No bullet shoots dead flat, there is always some arc. Faster velocities will flatten out that arc but it will never be "flat", unless you can push it to light speed.

Trajectory is what it's called and it's something that needs to be understood, especially by those of us that shoot frontstuffers at the velocities they work best at. What you may want to do is examine the point blank range (PBR) sight innumbers for the loads you are working with. I find this info helpful in understanding the limits of the load and then combine my personal limits with the loads limits to determine what is reasonable and feasable to expect of the load.

For instance, take your load of 95gr of powder and a 240gr bullet. Using 1750 as a velocity and .2 bc (these are just guesses for illustrative purposes) if you use a 2" PBR you sight in at 100 yards and your up 1" at 60 and down 1" at 115. For a 4" PBR you sight inat 122 and your up 2" at 75 and down 2" at 142. For a 6" PBR you sight in at 140 and your up 3" at 80 and down 3" at 164. Faster velocities will extend the spread of the numbers but will not make it a laser beam.

A little time studying trajectory charts helps a lot in visualizing what the bullet is doing (path wise) when it leaves the muzzle. I find this helps me in estimating hold over on longer shots as well as having the confidence to point and shoot when the target is within the PBR I'm setup for.

Good luck with your load.
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