Originally Posted by ergceo
Also, what is this angle cosine stuff I am seeing? Us rednecks just out in our stands shooitng whitetail don't know much about these here acoutrements. ;)
Look at the end of the minute hand on a clock when it's midnight. Let's assume the hand is 6 inches long. The tip of the hand is straight up; not canted. Bullet drop is from the tip of that minute hand where our imaginary barrel's pointed to the clock center where its shaft is that turns it which is our target center or aiming point; 6 inches straight down.
Now we'll "cant" that minute had and in five minutes it's pointed at the number "1." It's now canted 30 degrees; quite a ways for a rifle but the theory and reality's still the same. The bullet will drop just as much, or 6 inches, so it drops from the tip of the minute hand down the same distance it did at midnight when it was at 12. Now the bullet strikes to the right and somewhat low with our aiming point at the same place.
If we just canted that minute hand only 1 minute of time from straight up at 12 o'clock, it would be canted only 6 degrees. It would be to the right at its tip the same amoung as the length of the hand straight down and be to the right of the shaft but hardly any difference vertically. 6 inches down from the 1 minute mark doesn't move the impact point much vertically, but it's the same amout to the right as the minute mark is.