“22 Plinkster” is an avid shooter who has produced a number of entertaining videos for his YouTube Channel. In the video below, he tackles the question “Why Do Misfires Occur in .22 LR Rimfire Ammunition?” This is the most common question posed to 22 Plinkster by his many viewers. He identifies four main issues that can cause .22 LR misfires or faulty ignition:

1. Damaged Firing Pin — The dry firing process can actually blunt or shorten the firing pin, particularly with older rimfire firearms. Use of snap caps is recommended.

2. Poor Ammunition — Some cheap brands have poor quality control. 22 Plinkster recommends using ammo from a manufacturer with high quality control standards, such as CCI and Federal.

3. Age of Ammunition — Rimfire ammo can function well for a decade or more. However the “shelf life” of rimfire ammunition is not infinite. You ammo’s “lifespan” will be shortened by heat, moisture, and humidity. You should store your rimfire ammo in a cool, dry place.

4. Mishandling of Ammunition — Tossing around ammunition can cause problems. Rough handling can cause the priming compound to be dislodged from the rim. This causes misfires.

Preventing misfires is essential if you want to succeed in NRL22 competition and other rimfire competition disciplines run “on the clock”.

Top Image courtesy Cheaper Than Dirt Shooters Log.

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.

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”.

22Plinkster runs of the most popular gun-centric YouTube channels. His videos have been watched by hundreds of thousands of firearms fans. Many of 22Plinkster’s videos involve trick shots, such as shooting a .22LR through 100 balloons, but he also does serious reviews. He’s actually a competent marksman who has shot a vast collection of .22 LR/22 WMR pistols and rifles, making him a qualified rimfire expert (as well as a trick-shot artist and showman). Today we feature five 22Plinkster Firearms Videos, plus a bonus Vudoo Gun Works video review from GunsandTactics.com.

Vudoo Gun Works Ravage Precision .22 LR Rifle

For this Sunday GunDay article, we showcase a complete Vudoo rifle, a mag-fed Ravage with Ridgeback stock. 22Plinkster declared: “It’s a Tack-Driver … this .22 LR Rifle is the most accurate .22 LR bolt-action rimfire rifle I have ever shot in my life.” And he notes that he has shot Anschutz, Lithgow and other quality rifles. Vudoo Gunworks offers the .22 LR Ravage model as a custom build with a McMillan or Grayboe stock starting at $3230.00. The images here show the Ravage with Grayboe Ridgeback stock.

Firing from a Lead Sled, 22Plinkster starts out at 50 yards, and produced a 0.335″ group at 50 yards using Lapua Midas+ ammunition (4:00 time-mark). Then this session gets really impressive. Continuing with Lapua Midas+ ammo, this Vudoo Ravage produced a sub-half-inch group at 100 yards*. You can watch that Midas+ group form up from 7:20 to 8:25 in the video. Then, with ELEY Tenex ammo, he produced a 0.707″ group (10:30) and an even smaller group (11:55).

22Plinkster says Vudoo’s Ravage is a top choice for NRL22/PRS rimfire matches and Rimfire ELR competitions: “This is the cream of the crop. [Many] people who are winning PRS rimfire matches are shooting Vudoos. What sets this rifle apart from a lot of the other Match 22 rifles is what it does past 300 yards. A lot of rifles — Anschutz, Lithgow, CZ — shoot really good out to 300 yards. But after 300 yards, their accuracy diminishes big-time.”

Vudoo V22 Ravage with a fluted 18″ Kukri barrel in an Urban Camo Grayboe Ridgeback stock.

If you are interested in getting a Vudoo rimfire rifle, then definitely watch this 20-minute Guns & Tactics video. It provides extensive accuracy testing for multiple ammo types with verified group sizes. Then the reviewer shows the working details of the rifle, including the bolt, trigger system, and magazine. The video also includes field testing from bipod as well as competition-type practical stages out to nearly 400 yards.

Savage A22, 22 Magnum (WMR) Rifle Field Test

The Savage A22 is the .22 WMR “big brother” to Savage’s popular A17 17 HMR rifle. In this video, 22Plinkster demonstrates that the A22 is a very reliable semi-auto that can deliver near-1 MOA accuracy when the barrel is clean. This rifle retails for about $390.00.

Smith & Wesson Model 41 .22 LR Pistol Review

The S&W Model 41 is a classic American rimfire target pistol. Beautifully crafted, the Model 41 boasts a superb trigger, comfortable grip, and excellent accuracy. New or used, a Model 41 would be a fine addition to any firearms collection.

Volquartsen Scorpion .22 LR Pistol Review

The Scorpion demonstrated exceptional accuracy in the hands of 22Plinkster. It comes with a large target-style grip. With a built-in compensator, the Scorpion stays on target with almost no muzzle rise. The comp can be easily switched out with a suppressor (See video at 3:00 time-mark).

S&W Victory Vs. Ruger Mark IV Pistol Shoot-Off

22Plinkster liked both pistols. He favored the grips on the Ruger while preferring the S&W’s trigger. He felt the Ruger’s iron sights were best for precision work, but he noted that the green dot fiber optic sights on the S&W Victory worked better for speed work.

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.

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”.

“22 Plinkster” is an avid shooter who has produced a number of entertaining videos for his YouTube Channel. In the video below, he tackles the question “Why Do Misfires Occur in .22 LR Rimfire Ammunition?” This is the most common question posed to 22 Plinkster by his many viewers. He identifies four main issues that can cause .22 LR misfires or faulty ignition:

1. Damaged Firing Pin — The dry firing process can actually blunt or shorten the firing pin, particularly with older rimfire firearms. Use of snap caps is recommended.

2. Poor Ammunition — Some cheap brands have poor quality control. 22 Plinkster recommends using ammo from a manufacturer with high quality control standards, such as CCI and Federal.

3. Age of Ammunition — Rimfire ammo can function well for a decade or more. However the “shelf life” of rimfire ammunition is not infinite. You ammo’s “lifespan” will be shortened by heat, moisture, and humidity. You should store your rimfire ammo in a cool, dry place.

4. Mishandling of Ammunition — Tossing around ammunition can cause problems. Rough handling can cause the priming compound to be dislodged from the rim. This causes misfires.

Preventing misfires is essential if you want to succeed in NRL22 competition and other rimfire competition disciplines run “on the clock”.

Top Image courtesy Cheaper Than Dirt Shooters Log.

If you are looking for a versatile, well-crafted semi-auto .22 LR pistol, here’s an option you should definitely consider — the SIG Sauer P322. Introduced in 2022, this .22 LR rimfire pistol that should be popular with SIG’s centerfire handgun owners and anyone who wants a quality, polymer-framed .22 LR pistol. The P322 offers excellent ergonomics and 20+1 capacity, making it good for cross-training and fun rimfire shooting.

This VIDEO explains the features of the new P322 (Loud Volume — turn down at work):

The P322 has many premium features, including an optics-ready removable rear sight plate allowing easy installation of a red dot optic. The P322 offers ambidextrous controls, interchangeable flat and curved triggers, and fiber optic front and rear sights. The P322 even comes with a threaded barrel adapter making it suppressor-ready right out of the box. And with a 20-rd magazine for 20+1 total capacity, the new P322 is the highest-capacity .22 LR pistol in its class. (And a mag extension is offered for 25-rd capacity).

Though it may look like a striker-fired pistol, the SIG P322 is a hammer-fired, single-action-only design (the hammer is enclosed by the rear of the slide). The P322 is blow-back operated with a fixed (non-tilting) 4″ barrel. This helps contribute to excellent accuracy and reliability.

Hands-On P322 Testing by 22Plinkster

SIG Sauer P322 Pistol Features:

Ambidextrous Controls With Reversible Magazine Catch
Optics-Ready Removable Rear Sight Plate
Fiber Optic Front and Rear Sights
Hammer-fired, Single-Action-Only, Fixed 4″ Barrel
Suppressor-Ready With Included Threaded Barrel Adapter
Interchangeable Trigger Shoes (flat and curved included)
20 Round Magazine Capacity (with +5 optional mag extension)
SEE PRODUCT PAGE

While Accurateshooter.com concentrates on high-accuracy rifles, we know that many of our readers enjoy handguns. We are often asked “What is your favorite handgun — Glock? HK? SIG Sauer?” The answer to that question may be surprising. This Editor’s favorite handgun, at least the one that gets shot most often, is a rimfire revolver — that’s right, a wheelgun.

This Editor’s first really accurate handgun was a .22 LR Smith & Wesson Model 617 that could easily stack ten shots in a dime at 10 yards. It remains my favorite and most-used handgun. What can we say about the Model 617? The single-action trigger pull is superb, and the accuracy surpasses most any semi-auto rimfire pistol, except for a few, very expensive target pistols. We like the 6″ version for the longer site radius, but the 4″-barrel 617 is also very accurate, and it balances better.

S&W Model 617 now has a 10-round cylinder, but early models were six-shooters.

We strongly recommend that new pistol shooters start off with a .22 LR rimfire handgun. The .22 LR cartridge is accurate but has very low recoil, less “bark” than a centerfire, and very little smoke and muzzle flash. New shooters won’t have to fight muzzle flip, and won’t develop a flinch from the sharp recoil and muzzle blast common to larger calibers. With the .22 LR, the trainee can focus on sight alignment, breathing, and trigger pull.

Smith & Wesson Model 617 Video Reviews
Here are two video reviews of the Smith & Wesson Model 617, both 4″-barrel and 6″-barrel versions. Both videos demonstrate the 617’s great accuracy. The reviewers concede that this handgun is pretty expensive, but all agree that the Model 617 will last a lifetime, and hold its value.

Hickok 45 Demos a 4″ Model 617. See also Hickok 45 m617 Part 2:

This Video Features the Full-size 6″-Barrel Model 617:

Recommended .22 LR Revolver Training Targets

The .22 LR cartridge makes small bullet holes in paper. These can be hard to see if you’re shooting at large, black bulls-eyes, particularly at an indoor range. Also, when shooting rimfire, you’ll go through ammo quickly. For that reason we recommend targets with bright-colored, multiple aiming points.

The 19″x25″ Sight-Seer target (left) is great for pistol practice. It features eight red bulls on a 1″-square grid. Ultra bright fluorescent red inks, printed on heavy, 60-lb vellum paper, are highly visible, even indoors. You can use a classic Six O’Clock hold with this target, putting the bottom of each circle on top of your revolver’s front sight.

The smaller, 8.5″x11″ Sinclair Fluorescent Sight-In Target (right) has four small diamonds surrounding a large center diamond overlaid on a 1-inch grid. Diamonds and grid are printed in fluorescent red/orange on white, heavy-grade paper so your shots print nice and clean. A 25-pack is $6.99 at Brownells.

Recommended .22 LR Ammo Box

When we go to the range with rimfire handguns or rifles we bring this handy ” target=”_blank”>$13.99 MTM ammo caddy. The compact carry case will hold boxed ammo, plus you can lay out your ammo in 10-round rows (with 100 rounds nose-down). This makes it easy to fill the 10-Rd cylinder on your Model 617. This ammo case is offered in both blue or red (rust) and there is room in the center for more ammo boxes. One recent purchaser notes: “Very handy box for .22 LR makes knowing your shot count easy”.

22Plinkster runs of the most popular gun-centric YouTube channels. His videos have been watched by hundreds of thousands of firearms fans. Many of 22Plinkster’s videos involve trick shots, such as shooting a .22LR through 100 balloons, but he also does serious reviews. He’s actually a competent marksman who has shot a vast collection of .22 LR/22 WMR pistols and rifles, making him a qualified rimfire expert (as well as a trick-shot artist and showman). Today we feature five 22Plinkster Firearms Videos, plus a bonus Vudoo Gun Works video review from GunsandTactics.com.

Vudoo Gun Works Ravage Precision .22 LR Rifle

Last Sunday we featured an NRL22 rimfire competition rig built with a Vudoo Gun Works V-22 action. For this Sunday GunDay article, we showcase a complete Vudoo rifle, a mag-fed Ravage with Ridgeback stock. 22Plinkster declared: “It’s a Tack-Driver … this .22 LR Rifle is the most accurate .22 LR bolt-action rimfire rifle I have ever shot in my life.” And he notes that he has shot Anschutz, Lithgow and other quality rifles.

Firing from a Lead Sled, 22Plinkster starts out at 50 yards, and produced a 0.335″ group at 50 yards using Lapua Midas+ ammunition (4:00 time-mark). Then this session gets really impressive. Continuing with Lapua Midas+ ammo, this Vudoo Ravage produced a sub-half-inch group at 100 yards*. You can watch that Midas+ group form up from 7:20 to 8:25 in the video. Then, with ELEY Tenex ammo, he produced a 0.707″ group (10:30) and an even smaller group (11:55). This complete rifle is available from Vudoo Gun Works for $2545.00 without optics.

22Plinkster says Vudoo’s Ravage is a top choice for NRL22/PRS rimfire matches and Rimfire ELR competitions: “This is the cream of the crop. [Many] people who are winning PRS rimfire matches are shooting Vudoos. What sets this rifle apart from a lot of the other Match 22 rifles is what it does past 300 yards. A lot of rifles — Anschutz, Lithgow, CZ — shoot really good out to 300 yards. But after 300 yards, their accuracy diminishes big-time.”

Vudoo V22 Ravage with a fluted 18″ Kukri barrel in an Urban Camo Grayboe Ridgeback stock.

If you are interested in getting a Vudoo rimfire rifle, then definitely watch this 20-minute Guns & Tactics video. It provides extensive accuracy testing for multiple ammo types with verified group sizes. Then the reviewer shows the working details of the rifle, including the bolt, trigger system, and magazine. The video also includes field testing from bipod as well as competition-type practical stages out to nearly 400 yards.

Savage A22, 22 Magnum (WMR) Rifle Field Test

The Savage A22 is the .22 WMR “big brother” to Savage’s popular A17 17 HMR rifle. In this video, 22Plinkster demonstrates that the A22 is a very reliable semi-auto that can deliver near-1 MOA accuracy when the barrel is clean. This rifle retails for about $390.00.

Smith & Wesson Model 41 .22 LR Pistol Review

The S&W Model 41 is a classic American rimfire target pistol. Beautifully crafted, the Model 41 boasts a superb trigger, comfortable grip, and excellent accuracy. New or used, a Model 41 would be a fine addition to any firearms collection.

Volquartsen Scorpion .22 LR Pistol Review

The Scorpion demonstrated exceptional accuracy in the hands of 22Plinkster. It comes with a large target-style grip. With a built-in compensator, the Scorpion stays on target with almost no muzzle rise. The comp can be easily switched out with a suppressor (See video at 3:00 time-mark).

S&W Victory Vs. Ruger Mark IV Pistol Shoot-Off

22Plinkster liked both pistols. He favored the grips on the Ruger while preferring the S&W’s trigger. He felt the Ruger’s iron sights were best for precision work, but he noted that the green dot fiber optic sights on the S&W Victory worked better for speed work.

Shooting plates is fun. You get immediate feedback — “instant gratification” when you make a hit. When shooting steel inside 100 yards, we like to use .22 LR rimfire guns. The ammo is inexpensive, noise levels are lower (though you still need ear protection), and at close ranges there are fewer issue with ricochets and bullet splash-back. Additionally, for busy folks who don’t have time to reload, you can pick up a .22 LR rifle or pistol, grab a couple $5 boxes of ammo, and get to the range in a few minutes. The convenience means it is easier to shoot every week if you like.

SFC Joel Turner from the USAMU’s Action Shooting Team offers a few pointers on how to shoot plates quickly and accurately. He’s using a centerfire pistol, but the same principles apply for rimfire handguns. Click speaker icon to activate audio.

New .22 LR CP33 Pistol is Great for Plates
If you like shooting plates with rimfire guns, one of the better new pistols for the job is Kel-Tec’s CP33. We tested this interesting handgun at the 2019 SHOT Show Media Day at the Range, and were impressed. The pistol is big, but balances well. The sights are easy to see, and the full-length rail lets you easily mount a variety of optics. The trigger is surprisingly good — better than 90% of rimfire handguns out there. For the plates game, this “quad-stack” gun can handle long stages without mag changes. The standard clear-sided CP33 magazine holds 33 rounds of .22 LR ammo.

If you are interested in an affordable, but very accurate, high-capacity semi-auto rimfire pistol you should consider Kel-Tec’s new CP33. Shooting Sports USA (SSUSA) notes: “The rapid growth of rimfire competition in Steel Challenge has prompted some gun makers to enter the fray. Kel-Tec is one, and their new CP33 .22 LR pistol has a lot of potential.” Popular YouTube host 22 Plinkster tested the gun and reports: “This handgun has been 100% reliable IF I load the magazine the right way… and it’s pretty dog-gone accurate.” The video below shows the best way to load the 33-round magazine:

SSUSA’s testers tried the pistol with a variety of ammo and it consistently shot about one-half-inch for five shots “from a 25-yard sandbag bench rest using the iron sights.” SSUSA noted that the gun disassembles quickly and easily by removing one central pin. That’s a nice feature.

READ FULL Kel-Tec CP33 Review in Shooting Sports USA »

Overall SSUSA’s tester, Chris Christian, was impressed with the gun, saying it balanced well and the sights aligned naturally: “…the neutral-balance-point grip produced an almost instinctive sight alignment.”

Christian used the CP33 in a 6-stage Steel Challenge Match, and did well: “I decided to shoot Rimfire Pistol Iron (RFPI) and used the CCI Mini-Mag. The high-speed ammo ran perfectly. [T]he bright sights and handling qualities let me finish top among iron-sight shooters and even hold my own with C and B class rimfire pistol shooters using optical sights. It would be interesting to put a reflex sight on the gun, and maybe even shoot some Bullseye with it.”

CCI and Federal Premium are both brands of Vista Outdoor. Most CCI rimfire is produced in Idaho, while other Federal-branded rimfire ammo is produced in Federal’s Anoka, Minnesota facilities. Here we feature videos from both CCI and Federal ammo plants. Watch and learn how rimfire ammo is made.

Field & Stream Tours Federal Ammo Plant in Minnesota
A reporter for Field & Stream recently got a chance to tour 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.

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

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 recommend you watch the video from start to finish. You’ll definitely learn some new things about rimfire ammo.

.22 LR Ammo Production at CCI Ammo Plant in Idaho
Back in 2016, YouTuber 22Plinkster was able to tour the CCI Ammo plant in Lewiston, Idado. Here is the rimfire production video he produced.

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.

Photo courtesy BulkAmmo.com.