Maximum point blank range for medium game like goats will be much further than for small varmints.

Mid-range Trajectory


32
40 shares, 32 points

 

Q:I don’t know what you think about mid-range trajectory figures, but Ican see little practical advantage in the average hunter knowing howhigh his bullet is going to be at mid-range. It’s quite a while sinceI studied the subject of trajectory and may have forgotten most ofit, but I do remember that “height at mid-range” and”maximum height of trajectory” are not the same, and thatthe latter is not reached until a point well beyond mid- range.Bearing this in mind, I believe that knowing how high a bullet isgoing to be at mid-range is of dubious value at best.

GeorgeEllicot

 

A:If it were not for the retardation of the bullet by the atmosphere,the maximum height of the trajectory would occur at exactly one-halfthe range. However, under actual conditions the maximum height of thetrajectory comes at a point slightly beyond mid-range and is slightlyhigher than mid-range height. However, in the field the difference isso small as not to be of any practical importance. Take for example,the .30-06 firing a 180gn bullet at 2700fps, the average height ofthe trajectory over a distance of 100 yds happens at 50.9 yds. Thedifference in the height of the trajectory at mid-range from what itis at this point is too small to worry about. Even when we extend therange to 200yds., the maximum height of the arc comes at 103.8 yds.The height at this point is 2.89″ as against 2.86″ atmid-range. Obviously, as the range gets greater so the differenceincreases, but over average hunting ranges the difference is of nopractical importance. But I disagree with you about it being uselessto know what the mid-range trajectory of your load is. Shooting atvarmints I don’t want the bullet to rise more than 2 inches atmid-range, or rise more than 4 inches with a big game rifle, andalways sight-in to ensure this. I think that you are just nitpicking!


Like it? Share with your friends!

32
40 shares, 32 points

What's Your Reaction?

super super
10
super
fail fail
4
fail
fun fun
2
fun
bad bad
20
bad
hate hate
18
hate
lol lol
16
lol
love love
14
love
omg omg
10
omg
Nick Harvey

Nick Harvey is one of the world's most experienced and knowledgeable gun writers, a true legend of the business. He has been writing about firearms and hunting for more than 65 years, has published many books and uncounted articles, and has travelled the world to hunt and shoot. His reloading manuals are highly sought after, and his knowledge of the subject is unmatched. He has been Sporting Shooter's Gun Editor for longer than anyone can remember. Nick lives in rural NSW, Australia.

0 Comments

Send this to a friend