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November 17th, 2014

Sierra Infinity 7 Ballistics Software — Video Shows Features

Sierra Bullets has released Version 7 of its respected Infinity Exterior Ballistics software, available now for $39.95 for Windows computers. Renowned Sierra Ballistic Consultants Ted Almgren and Dr. Bill McDonald, who have written all Sierra Software since 1970, also wrote Infinity Version 7. Both are retired scientists from a major aerospace company. Infinity Exterior Ballistics Software version 7 is a sophisticated solver that can output multiple trajectory charts. A built-in database includes bullets and cartridges offered by 15 manufacturers, both U.S. and foreign.

This 13-minute Video Demonstrates the Many Features of Infinity 7 Ballistics Software:

This sophisticated program computes the effects on the bullet trajectory of variations in firing conditions. For example, you can change altitude of the firing point, target angle (uphill/downhill), wind speeds, or even modify the Ballistic Coefficient. In fact, you can change any inputted firing condition or combination of conditions.

One very handy function is the “back-to-zero” calculation. Infinity 7 software will compute where your gun is zeroed if you know that it shoots high by a measured amount at a known range.

Compare Trajectories with Five Different Bullets
One very powerful feature of Infinity 7 is its trajectory comparison capability. With most ballistics programs (such as the JBM online ballistics calculator), you can only view one bullet’s trajectory (and associated drop chart) at a time. Not so with Infinity 7. This software handles up to five different bullets at a time. You can compare downrange velocity, energy, drop, bullet path height, or crosswind drift with results shown in bolt tabular and graphical format. That helps you select the best bullet for your gun and application. The ability to compare downrange ballistics of five different bullets at once is particularly helpful for hunters, who can compare the “hitting power” of different projectiles at various distances.

You can purchase Infinity 7 Ballistics Software as a standalone product for $39.99, or you can buy the Infinity 7 Suite for $59.95, which includes the Sierra Bullets 5th Edition Reloading Manual on CD-ROM. If you prefer a printed loading Manual, a combo pack with Infinity 7 software CD-ROM plus published (hard-back) Reloading Manual is offered for $64.95.

Permalink - Videos, Bullets, Brass, Ammo 3 Comments »

November 17th, 2014

Skill Training: Shooting with Both Eyes Open

Julie Golob Shoot Book Eyes open There are many benefits to shooting with both eyes open especially when shooting shotguns and handguns, but training yourself to do it can be challenging for some. For many, it is a struggle to fight the natural instinct to close one eye. So how do you train yourself to kick that habit?

How to Train to Keep Both Eyes Open
The first step is to determine if you can see the sights with both eyes. If you can’t get a clear sight picture on target with both eyes open, or if you see two front sights or some other strange configuration that is nearly impossible to decipher, then shooting with both eyes open may not work for you. It’s not the end of the world. It’s more important that you acquire a proper sight picture and hit your target.

If you are a competition shooter that struggles with this you can get a little help from some frosted tape. In most cases it; just a matter of determining your eye dominance and placing a piece of tape on your eye protection on the lens in front of your non-dominant eye. The tape blocks this eye from seeing the sights, but still allows you full access to your peripheral vision.

An effective way to prevent yourself from closing an eye is to spend a good amount of time dry firing. (Dry fire means NO AMMO!) Practice acquiring the sights with both eyes open. Start with the firearm at low ready with both eyes on the target. Bring the gun up to your line of sight and acquire the proper sight picture on your target. The repetition of presenting the gun will help train you to keep those eyes open when you transition to live fire. As with any habit, you’ll need to train yourself to stop — this means more than just a few times dry firing.

When you hit the shooting range, you may find that despite all that dry-fire practice, you still close an eye. It might be a matter of sympathetic reaction to recoil. Using .22 caliber, airsoft guns and light loads can help you transition to larger calibers and full power ammunition. Just as you had to concentrate keeping both eyes open in dry fire, it’s likely you will have to do the same during your live fire training as well.

For more shooting tips visit www.JulieGolob.com and also read my book, SHOOT: Your Guide to Shooting and Competition. It’s available in print and eBook formats from these vendors: