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January 6th, 2026

Shooter Science: Eye Dominance, Eye Protection, Irons vs. Optics

firearm science NRA Jessie Duff Harrison

NRA Media offers a series of 40 informative videos about the Science of Shooting, covering a wide range of topics, from eye dominance to long-range ballistics. These videos feature high production values, with super-slow motion segments, as well as helpful computer graphics to illustrate the principles covered.

The videos are narrated by Jessie Duff, a top action pistol shooter (and the first women ever to achieve USPSA Grand Master status). Jessie is assisted by talented shooters such as Top Shot Season 4 Champion Chris Cheng. There are forty videos in the Firearm Science Video Series. Here are five NRA videos, with links to others below. You’ll find all 40 NRA Firearm Science Videos HERE.

Eye Dominance — How to Determine Which Eye is Dominant

Host Jessie Duff and longtime shooter Krystie Messenger demonstrate how eye dominance affects aim and teach you how to determine your dominant eye in this edition of Firearm Science. There are very simple tests you can do to determine your eye dominance. This Editor is right-handed but left-eye dominant. All competitive shooters should check for eye dominance. If you are cross-dominant, you can alter your head position or put a paper patch on one frame of your shooting glasses.

Eye Protection — Effect of Different Color Lenses

No matter what you’re shooting, eye protection should always be worn. But with so many choices, what should you wear? In this edition of Firearm Science, two-time Olympic trap shooter Corey Cogdell explains lens color options for protective eyewear. Different colors may be selected according to the light conditions and the sport. For most rifle shooters using magnified scopes, clear lenses are probably the best choice, except on very bright summer days.

Iron Sights vs. Optics

Host Jessie Duff and shooter Krystie Messenger demonstrate the benefits and drawbacks of using iron sights and optics in this edition of Firearm Science. For AR-type rifles, choosing the right option depends on the intended use of the rifle and the rules of competition. For example, a “Standard military Rifle” for CMP competition must have iron sights. But current NRA service rifle competition (and CMP unlimited military rifle class) allows scopes. Olympic smallbore shooters and Palma shooters have shown that extreme accuracy IS possible with sophisticated target sights. Below is the iron-sights Palma rifle with which John Whidden (Whidden Gunworks) won NRA Long-Range National Championships.

John Whidden .308 Win Palma rifle

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January 6th, 2026

See How .22 LR Rimfire Ammunition is Made — Factory Videos

22 .22 Plinkster Youtube Video CCI Speer Rimfire Ammo Ammunition plant Lewiston Idaho

Today’s showcase shows how CCI, Federal, and Remington .22 LR rimfire ammunition types are produced in large American factories. CCI and Federal, until very recently, were part of the Vista Outdoor Kinetic Group. In December 2024 CCI and Federal along with other Vista ammo brands were sold to a Czech company, CSG.* Most CCI rimfire is produced in Idaho, while most Federal rimfire ammo is produced in Anoka, Minnesota. Here we feature videos from CCI, Federal, and Remington ammo plants. Watch and learn how rimfire ammo is made.

The Manufacturing Process for .22 LR Rimfire Ammunition
Shooting Sports USA explains: “Rimfire cartridge cases are the oldest self-contained cartridge in existence, having been in continuous production since the mid-1850s. Rimfire cases are drawn from a thin piece of brass and formed with a hollow rim. A priming compound is then forced into the case using centrifugal force, where it is charged with powder and a bullet is seated in the mouth of the case. The case is then crimped around the bullet to ensure sufficient push and pull when the round is fired. When the firing pin strikes the thin brass rim of the case, the hollow rim is crushed and the primer is ignited.” Source: SSUSA.org 9/2/2017.

.22 LR ammunition photo
Photo courtesy BulkAmmo.com.

.22 LR Ammo Production at Federal Ammo Plant in Minnesota

Note to Viewers — After Starting Video, Click Speaker Icon to HEAR audio!

A while back a Field & Stream writer toured the Federal ammunition production facility in Anoka, Minnesota. This large plant produces both rimfire and centerfire ammunition. While touring the plant, the reporter was allowed to capture video showing the creation of .22 LR rounds from start to finish. This is a fascinating video, well worth watching. Click speaker icon for sound.

22Plinkster Tours CCI/Speer Idaho Factory

Trickshot artist and YouTube host 22Plinkster was able to tour the CCI/Speer production facility in Lewiston, Idaho. This large plant produces both rimfire and centerfire ammunition. While touring the plant, 22Plinkster was allowed to capture video showing the creation of .22 LR rounds from start to finish.

This revealing video shows all phases of .22 LR ammo production including cupping, drawing, annealing, washing, drying, head-stamping, priming, powder charging, bullet seating, crimping, waxing, inspection, and final packaging. We really recommend you watch the video from start to finish. Well worth watching, this excellent video has logged 3.2 million views on YouTube.

Remington Factory Produces Millions of Rounds of Rimfire Ammo

Billions of .22 Long Rifle rounds are produced every year, and Remington Ammunition in Lonoke, Arkansas produces a significant share of the rimfire ammunition used worldwide. This “American Rifleman Television” feature shows the full ammo production process. At the start, brass cups are stamped out of large sheets of brass, and the cups then move on to have the headstamps applied and rims formed. Next, the rounds move on to be annealed and rinsed. Then the cases move onto priming. A wet priming pellet is then pressed into each empty .22 case, and the case is spun rapidly, spreading the pellet mix into the inner cartridge rim. The primed cartridges are then sent to a drying house, where they’ll sit for several days to allow the priming mixture to dry. The Remington factory is very efficient, with “some of the fastest rimfire-making equipment on the planet”.


*In December 2024, Vista Outdoor completed the $2.23 billion sale of the company’s “Sporting Products” division — which is known as the Kinetic Group and includes American ammunition brands CCI, Federal Premium, Hevi-Shot, Remington, and Speer — to the Czechoslovak Group (CSG), a Czech conglomerate. READ Full Story of Vista Outdoor Kinetic Group ammo brands sale.

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