Whenever a new powder or bullet appears on the market, folks have to wait a long time for commercially vetted load data unless they happen to shoot one of the popular calibers. Powder and bullet companies target their powder for these calibers. Similarly, long-range target shooters frequently press the maximum load ceiling to get the slight added performance edge that can make the difference between winning or losing a contest. How do you work up safe loads when you happen to be in one or both of these groups? Go here to read a discussion about finding out when pressures might be too high.
The sight picture generation software has been updated to include the Build Sight Pictures utility. We have taken the core graphics of the QuickPix sight picture calculator and wrapped a new user interface around it to make explorations of range and wind much easier. All the user needs is the drop at 500 yards when the rifle is zeroed at 200 yards. The software will calculate a useable trajectory from about 50 yards to close to 600 for building sight pictures. There is also a built-in drift estimator but the drift calculations will be much better if the 10 mph wind drift at 500 yards is also entered. There is a default scope image and target, but others can be selected from the menu. Once the first picture is calculated, changes in range and wind strength can be entered on the same page as the picture, giving a quick and convenient look at how things change.
Look over the set of target images from Lyman Products Corporation. These include a Bighorn Sheep, Black Bear, a second Coyote, Dall Sheep, a Rocky Mountain Goat, and a Brown Bear. Have a look and see if they help with your shooting!
Your favorite rifle is sighted to point of aim at 100 yards and that pesky deer shows up at 275 yards. What is the sight picture needed to center in the vital zone?
Is the sight picture easier to use if the rifle was sighted in 2.5 inches high at 100 yards?
Build sight pictures from example trajectories: Demo.
Build sight pictures using 200 yd zero and 500 yard drop Build Sight Pictures
Here’s to Safe & Fun Shooting!
J. A. Smith
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