The Cartridge Comparison Guide is a remarkably comprehensive 340-page, spiral-bound book. Covering over 250 cartridges, the Second Edition of the Cartridge Comparison Guide is the product of many years of labor by Andrew Chamberlain, a Utah-based hunter. Andrew says his Guide “compares every factory available cartridge from the 17 calibers up to the 50 caliber cartridges”. (Sorry, most wildcat cartridges are not covered.) Chamberlain’s Guide also compiles cartridge data from major ammunition manufacturers such as Barnes, Federal, Hornady, Norma, Nosler, Remington, Sierra, Swift, Weatherby, and Winchester. It shows the optimal velocity achieved for each bullet weight and calculates bullet energy, recoil, and powder efficiency. Large color photos illustrate handgun and rifle cartridges.

The Cartridge Comparison Guide provides data for thousands of cartridge/bullet/velocity combos. Quick reference sheets and ballistics charts cover Trajectory, Velocity, and Energy out to 500 yards. The Cartridge Comparison Guide also offers a firearms lexicon, plus Appendices covering Cartridge Selection for Game Animals, Bullet Selection/Design, Bullet Expansion, and Wound Channel Characteristics.

New Content in Second Edition of Cartridge Comparison Guide
The Cartridge Comparison Guide (Second Edition) costs $39.99 plus shipping and tax. CLICK HERE to visit the Online Store where you can order the 340-page book. Here’s what’s new in the Second Edition:

• Addition of Shotgun Ammunition (Both Slug and Shot loads).
• Momentum Calculation for all Rifle, Shotgun and Handgun loads.
• Integration of Shotgun Slug Ammunition with Center Fire Rifle Data Tables.
• Factory Load Summary Added (Shows manufacturers and loads produced).
• One factory load and one hand load for every bullet weight available in each cartridge.
• Over 90 pages of additional ballistics content (roughly 35% more than in First Edition).

Great Resource for Hunters
One of Chamberlain’s main goals in creating the Cartridge Comparison Guide was to help hunters select the right cartridge for the job: “This started as a personal project to gather information on the more popular cartridges commonly used for hunting. I wanted to find the best all-around performing cartridge and rifle that a guy on a budget could shoot. I began comparing cartridge performance, versatility, bullet selection, powder efficiency, recoil generation vs. energy produced, standing ballistic data for different environments….”

Giant Cartridge Poster for Computer Wallpaper (1665×1080 pixels)
Here’s a great illustration of hundreds of cartridges and shotshell types. For dedicated reloaders, this would work great as desktop “wallpaper” for your computer. CLICK HERE for full-size image.

Do you have .20-Cal fever? Do you yearn to see what a 4200+ fps projectile can do to an unsuspecting prairie dog? Well you could go out and purchase a 204 Ruger rifle, fork over the money for a new, complete die set, and hope that the brass is in stock. Warren B (aka “Fireball”) has a more cost-effective solution. If you have .223 Rem dies and brass, all you need to shoot the 20 Practical is a new barrel and a .230″ bushing to neck down your .223 Rem cases. Warren’s wildcat is simple, easy, and economical. And the 20 Practical matches the performance of the highly-publicized 20 Tactical with less money invested and no need to buy forming dies or fire-form cases. Warren’s cartridge was aptly named. Practical it is.

20 Practical Tikka 595 Bolt Action for Varminting

by Warren B (aka “Fireball”) and Kevin Weaver

After building my 20 PPC, I wanted to do another .20 caliber, this time a repeater for predator hunting that could also serve as a gopher/prairie dog rifle. I wanted to use a Tikka M595 stainless sporter I had. This rifle is the ultimate repeater with an extremely smooth-feeding cycle from its single-column magazine. Since the Tikka was a .223 Remington from the factory, I first looked at possible case designs that would fit the magazine. The 204 Ruger was a very new round at the time and brass was scarce. I also didn’t care for the overly long case design or the standard throat dimensions of the cartridge. I then looked at the 20 Tactical. It was a nice cartridge but I didn’t like the fact that (at the time) an ordinary two-die Tac 20 set with just a plain full-length die and standard seater were $150. Not only did the costs bother me, but I was accustomed to using a Redding die set featuring a body die, a Type-S bushing neck die, and a Competition seater. To be honest, I also didn’t care for the 20 Tactical’s name–there is absolutely nothing tactical about the cartridge. I didn’t want to adopt a new cartridge based on what I perceived to be a marketing gimmick (that “tactical” title).

Warren B, aka “Fireball”, with his Tikka 595. With its smooth action and phenolic single-column mag, it cycles perfectly in rapid fire.

Simply Neck Down .223 Rem to Make a 20-223 Wildcat
I decided the best thing to do for my purposes was to simply neck down the .223 Rem case and make a 20-223. I already had the dies, the brass, and a rifle that would feed it perfectly. I decided to call the cartridge the 20 Practical because as you will see in this article, it truly is a very practical cartridge. In addition to the generous and inexpensive availability of brass and dies, the 20 Practical is an easy case to create, requiring no fire forming as a final step. Simply neck your .223 Rem cases down, load and shoot.

[Editor’s Note: Over the years, other shooters have experimented with .223 Remington cases necked down to .20 caliber, some with longer necks, some with different shoulder angles. Warren doesn’t claim to be the first fellow to fit a .20-caliber bullet in the .223 case. He gives credit to others who did pioneering work years ago. But he has come up with a modern 20-223 wildcat that involves no special case-forming, and minimal investment in dies and tooling. He commissioned the original PTG 20 Practical reamer design, and he and Kevin did the field testing to demonstrate the performance of this particular version.]

I chose Kevin Weaver at Weaver Rifles to fit and chamber the barrel to my rifle. Kevin does excellent work and is great to work with. Kevin liked the idea of the 20 Practical so much he agreed to purchase the project reamer. (BTW Kevin didn’t even need to purchase a Go/No-Go gauge, he just used an existing .223 Rem gauge.)

Before Kevin ordered the reamer, I talked over the reamer specs with him. My priorities were tolerances on the tight end of the .223 Rem SAAMI specification, a semi-fitted neck with no need for neck-turning, and a short throat so that we could have plenty of the 32gr V-Max in the case and still touch the lands. I also wanted this short throat in case [anyone] wanted to chamber an AR-15 for the 20 Practical. A loaded 20 Practical round will easily touch the lands on an AR-15 while fitting into the magazine with no problem. With its standard 23-degree shoulder, the 20 Practical case also feeds flawlessly through an AR-15.

As for the barrel, I only use Liljas on my rifles. I have had great luck with them. They have always shot well and they clean up the easiest of any barrels that I have tried. I had previously sent my Tikka barreled action to Dan Lilja so that he could program a custom contour into his equipment and turn out a barrel that would perfectly fit the factory M595 sporter stock. There isn’t much material on an M595 sporter stock so the contour had to match perfectly and it did. Dan Lilja now has this custom contour available to anyone who would like to rebarrel their M595 sporter with one of his barrels.

There Are Plenty of Good .204-Caliber Varmint Bullet Options

How to Form 20 Practical Cases — Simple and Easy
Forming 20 Practical cases is very easy. No fire-forming is required. Start with any quality .223 Rem brass. Then simply run the case into your bushing die with the appropriate bushing and call it done.

Project Componentry
My 20 Practical rifle started out as a Tikka Model 595 Stainless Sporter in .223 Remington. Though the M595 is no longer imported, if you shop around you can find M595 Sporters for bargain prices. Mine cost under $500. I think the action alone is worth that! The receiver has a milled dovetail for scope rings plus a side bolt release like expensive BR actions. The bolt cycles very smoothly. Ammo is handled with super-reliable 3- or 5-round detachable single-column magazines (FYI, Tikka’s M595 22-250 mags will feed a 6BR case flawlessly.) We kept the standard Tikka trigger but fitted it with a light-weight spring. Now the trigger pull is a crisp 1.8 pounds–about as good as it gets in a factory rifle. We replaced the factory tube with a custom, 24″, 3-groove Lilja 12-twist barrel. Dan Lilja created a special M595 sporter contour to allow a perfect “drop-in” fit with the factory stock. For optics, I’ve fitted a Leupold 4.5-14x40mm zoom in low Talley light-weight aluminum mounts. All up, including optics and sling, my 20 Practical weighs just under 8.5 pounds.

Test Report–How’s It Shoot?
I sent the barrel and barreled action to Kevin and in a very short time it was returned. Kevin did a perfect job on the rifle. I had asked him to try to match the bead blasted finish of the Tikka when he finished the new barrel. It came out perfect and the only way one can tell it is a custom is the extra two inches of length and the “20 Practical” cartridge designation.

So, no doubt you’re asking “how does she shoot?” Is my “prototype”, first-ever 20 Practical an accurate rig? In a word, yes. Even with the standard factory stock, and light contour barrel, it can shoot 3/8″ groups. Take a look at the typical target from this rifle. This is from an 8.5-pound sporter with a very skinny fore-end and a factory trigger.

Comparing the 20 Practical and 20 Tactical
Kevin tells us: “The 20 Practical and the 20 Tactical are almost identical cartridges. There are only slight differences in case Outside Diameter, shoulder angle, and case body length. The neck length on the 20 Tactical is a bit longer, but there is still plenty of neck on the 20 Practical to grip the popular bullets, such as the 32gr V-Max. Here are some specs:

Both the 20 Tactical and the 20 Practical are fine .20 caliber cartridges. Early on, the 20 Tactical was the more popular of the two because it had more publicity. However, my favorite would be the 20 Practical. Warren’s 20 Practical gives the SAME performance as the 20 Tactical without fire-forming, or having to buy expensive forming dies. So with the 20 Practical you do less work, you shell out a lot less money, yet you give up nothing in performance. What’s not to like? To create 20 Practical cases, just buy a .223 Rem Redding Type “S” Bushing Die set with a .230 or .228 bushing and have fun with this great little cartridge.”

Warren’s Tips on Forming 20 Practical Cases
Forming 20 Practical cases is very easy and no fire-forming is required. Start with any good quality .223 Rem brass. I’m happy using IMI cases. One can simply run the case into your bushing die with the appropriate bushing and call it done. I however like to make it a little more involved by doing the neck reduction in steps. I find that taking steps doesn’t overwork the brass as much as one step does. Also, if you resize the neck in too large of a step, sometimes, depending on the neck thickness, the neck will not be dimensionally what you would expect when finished. This is especially important towards the last step when one is getting close to the final required neck diameter.

For my IMI cases the first thing I did was to run them into an old RCBS .223 Rem full length die with the decapping assembly removed. This will take care of any dented necks on the raw cases and bring the necks down to around 0.243″. Since all standard full-length dies oversize the necks way too much, starting with a .223 FL die actually reduces the neck diameter quite a bit–and obviates the need to buy an extra bushing for the first step. I then use my Redding Type-S die with two bushing sizes to get down to where I need to be. In other words, I start with the FL sizer, then move to a Type-S with a 0.233″ bushing and finish with a 0.228″ bushing. Notice how, as I get to the final step, I use progressively smaller increments in size between the reductions. (Note: Depending on your brass your final bushing size may be different.)

I also take incremental steps when forming my other .20 calibers. The 20 PPC takes the least amount of steps as the parent 220 Russian case is pretty close to being a .20 caliber as it comes in its raw form. The 6mm BR case takes the most number of steps to form down to 20 BR as it comes with the largest neck diameter in its raw form. Remember, this is how I have chosen to form all four of my “practical” .20 calibers, the 20-222, the 20 Practical, the 20 PPC and the 20 BR. One could easily reduce the number of steps or eliminate them altogether on some of the parent cases, but be aware of just how much brass you are moving around at the neck in one pass.

We should remember the real reasons many of us enjoy the shooting hobby. Many of us like shooting because it gets us outdoors, away from work pressures. Shooting gives us a chance both to enjoy solitude as well as have fun with friends and family in the outdoors. For this Editor, a solo trip to the range in mid-week was often the perfect antidote to job stress. Going to a scenic venue and sending a few shots downrange was satisfying. And getting out of the hustle and bustle of the city did indeed calm the soul.

Talented 3-position shooter (and trick-shot artist) Kirsten Joy Weiss says that any day at the range is “always a good day”. Here is her photo to prove it. If that shot doesn’t motivate you to spend a day outdoor with rifles, we’re not sure what will. Here’s hoping you’ll have a chance to get in many fun days of shooting and/or hunting this summer and fall. That can be with air rifles, rimfire guns, or centerfire guns — they are all fun to shoot.

“Always a good day…” — Kirsten Joy Weiss

Are you looking to shave POUNDS from your hunting rig or varmint rifle? There are now multiple options for folks looking for a weight-saving, carbon fiber-wrapped barrel. You’ve probably heard about Proof Research. Yes that’s a good company that crafts good products. But now Proof Research has some noteworthy competition — Helix 6 Precision in Washington State.

Helix 6 Precision crafts button-rifled and cut-rifled carbon-wrapped barrels in both conventional and “pre-fit” configurations. The conventional (not pre-fit) carbon-wrapped Helix 6 barrel blanks cost $979.99 for most listed chamberings. Pre-fits are offered for Savage rifles, Ruger Precision Rifle (RPR) series, Tikka T3, Aero SOLUS, Defiance Ruckus, Sig CROSS, and Zermatt rifles. These pre-fit barrels are not cheap. A 6mm Creedmoor RPR pre-fit costs $1099.99, while the Savage pre-fits are also $1099.99 for most chamberings.

While Helix 6 barrels do offer significant weight savings, the founders of Helix 6 say low mass wasn’t the number one design goal: “Accuracy was paramount and weight reduction was secondary. We’ve taken the industry’s most advanced carbon fiber engineering and pushed the technology further with our proprietary … carbon fiber process.”

The founders of Helix 6 Precision say they build some of the best carbon/steel hybrid barrels on the market: “Our unique carbon fiber-layup design dampens barrel harmonics for better accuracy. Each barrel is cut from a 416R stainless steel core, and carbon fiber-wrapped using the Helix 6 Precision’s advanced process. This creates match-grade accuracy barrels with high heat dispersion that are 30% lighter than a steel barrel of the same contour. The bores are … hand-lapped for precision accuracy.” Helix 6 claims its barrels are “lighter, stronger, and faster cooling than anything else available on the market.”

Myth vs. Reality — What Carbon Can and Cannot Do

Carbon fiber is formed using thin strands of carbon bonded together with a plastic polymer resin. The resulting material is very strong and light weight. There’s a reason Formula 1 cars are crafted with carbon-fiber composites. But is a carbon-wrapped barrel the right option for you? Here are some factors to consider:

Weight Savings — There’s no doubt that a carbon-wrapped barrel will weigh less than an unfluted stainless steel barrel with identical length and contour (outside diameters). Helix 6 claims a 30% weight reduction compared to a conventional stainless steel barrel. That’s significant.

Accuracy — Carbon-wrapped barrels are NOT commonly being used for F-Class or Benchrest competition. However, Proof Research carbon-wrapped barrels have performed well in PRS competitions in the hands of top shooters. So, we can conclude that carbon accuracy is good enough for the PRS/NRL tactical game, at least at the local club level.

Heat Dispersion — Carbon-wrapped barrel-makers claim their hybrid design disperses heat better than an all-steel barrel. Some independent testers disagree, saying: “hold on now — the carbon actually acts as an insulator, so more heat is retained in the barrel”. The jury is still out. One thing that is true is that the carbon barrels seem to generate less mirage from barrel heat. Ask yourself, “if less heat is coming OFF the barrel, where is that heat retained?” But the reduced mirage could be a function of the black woven surface which may release heat differently than polished steel.

Pre-Fit, AR, and Custom Barrel Options
Helix 6 precision barrels are available as pre-fits for a wide variety of rifle types in many popular long-range cartridges. Helix 6 can also thread and chamber a barrel for most precision rifles. And pre-fit AR barrels are available in a wide variety of chamberings and lengths. Helix 6 Precision also supplies carbon-wrapped barrel blanks which can be chambered and fitted by a professional gunsmith. Helix 6 barrel blanks, buttoned-rifled or cut-rifled, are sold in many calibers. Offered calibers are: .224, .243 (6mm), .264 (6.5mm), .257 (pending) .277 (pending), .284 (7mm), .308, .338, and .375. In addition, .22 LR rimfire carbon barrel blanks are offered.

It’s almost Christmas. In parts of Europe hunting season continues well into winter. To celebrate the hunting lifestyle, we’re reprising a story from Europe that showcases the beauty of nature that can be experienced on a hunting trip.

If you need a break from your hum-drum day at the office, how about taking a virtual vacation to Norway, where you can explore the scenic mountains in the Fjord region?

Forum member Kenneth Skorpen (aka “Sal”) has created a cool video of a deer-hunting trip he took in Norway. He didn’t bag a buck on this trip, but the walk in the Fjordland mountains took Kenneth through some spectacular scenery. (At the 11:25 time mark you’ll see an amazing sunset over the Fjord.) Kenneth did encounter a doe that had fallen down the mountain, and apparently broken its neck (14:35 time mark). The terrain is very steep, and Kenneth observed that: “I feel fortunate to be able to do this, but I also feel very tired in my legs. Did you know that the hares around here have shorter left legs due to the steep hills?”

More Hunting/Shooting Videos from Norway
You can watch more interesting hunting and shooting videos from Norway on Kenneth Skorpen’s Streken Vertebrae YouTube Channel. Here are some links:

• Basics of Long-Range Field Shooting by Thomas Haugland
• October Deer Hunting in Norway
• Tikka T3 in XLR Chassis with March Scope
• Long-Range Uphill Shooting Position Training

And here is another Skorpen video showcasing beautiful Norwegian landscapes. This was filmed during a February rifle testing session with targets at 1100 and 1400 meters. You’ll see some stunning snow-capped scenery here, starting at the 4:30 time mark.

Forum member DNorton posted: “I live way up north where our white sandy beaches look like this!”

There is a nice thread in our Forum appropriately entitled “Winter Time”. You’ll find some great backcountry images taken by our Forum members. Winter is a special time in the outdoors. Forum member JDP explains: “Winter is the best time to shoot! One of the few of life’s ironies that works in my favor. The range is empty and barrels keep cool, no bugs, no waiting on people, no mirage. Yup, this world needs more thin blooded snow birds. This cool weather is terrible and dangerous, tell your friends! Do people get lonely while shooting or something? It’s the true holiday season in multiple ways.”

These two images come from Forum member Bill K on a winter varmint safari. He posted: “This was Varmint Shooter’s truck [showing the outside temperature] when we set up.” Brrrr… that’s cold.

The above photo is from Forum member 1LessDog, who posted: “The mound behind the Coyote is a Indian burial mound. There are six of them within a half mile of this one. I would really like to know how many coyotes I have shot off the mound. I would guess 4-5 a year over 35 years. It is one of my favorite spots to call from… any time I have a South to Southeast wind[.]”

Forum member Bojo posted images of his hunting trip in Northwestern Pennsylvania last week. Bojo wrote: “It was an early winter for us — temps from low 20s to mid 40s through a week’s swing. Our cold hits hard in January/February.”

The Vortex Blog contains an interesting article featuring recommended gear for a coyote hunting trip in late winter/early spring. This Vortex article covers all the items you’ll need: rifle, optics, shooting sticks, insulated clothing, Laser Rangefinder, game calls, carry packs and more.

In the article intro, Vortex notes: “Winter snow and cold temps don’t get Vortex’s Bill Krivanek down. In fact, quite the opposite. This time of year, he’s fired up about calling coyotes and putting a little fur on the ground. “There’s so much to love about these crafty critters”, said Bill. “They nearly always have the advantage. When you get one to come in to shooting range, you’ve really accomplished something. It’s as exciting as hunting gets.” CLICK HERE to read the FULL Article with a complete description of each item, shown in the lead photo above.

Today is Thanksgiving, aka “Turkey Day”, a time to enjoy an annual get-together with family and friends. To mark this occasion we offer a collection of interesting videos about turkey hunting plus a FREE Turkey target. Enjoy your Thanksgiving holiday!

GetZoneHunting.com has a vast video library for hunters, with hundreds of helpful videos on all types of hunting. In time for spring turkey season, GetZoneHunting offers a big collection of turkey hunting videos: At the Ranch – Turkey. On that page you’ll find 13 turkey hunting “how-to” videos. Here are links to five GetZone Turkey Hunting videos with valuable information from skilled, experienced hunters.

At the Ranch Turkey Hunting Videos

At the Ranch – Turkey offers solid advice for turkey hunters. These five videos will help you better understand turkey behavior and have success on your hunt. Click any photo to watch the particular video on the GetZone website. (Work Warning — When each GetZone video opens, it may immediately launch an annoying commercial with loud AUDIO!). There are eight more turkey hunting videos on GetZone’s Turkey Hunting HQ Page.

At the Ranch: Shot Placement for Turkeys — CLICK PHOTO to Watch Video

At the Ranch: Turkey Hunting Essentials — CLICK PHOTO to Watch Video

At the Ranch: The Difference Between a Jake and a Tom — CLICK PHOTO to Watch Video

At the Ranch: Early vs. Late Spring Turkey Hunt — CLICK PHOTO to Watch Video

At the Ranch: How to Plan a Turkey Hunt — CLICK PHOTO to Watch Video

Free Printable Turkey Target from AccurateShooter.com

As a special bonus for our readers, here is a free, printable Turkey Target, so you can practice for your turkey hunting adventure, This special Turkey Bullseye Target was created by our friend and Forum member Pascal (aka “DesertFrog”). CLICK HERE for FREE Turkey Target.

Hunting season is well underway throughout North America. If you’re planning a hunt, and want to improve your chances of success, you can benefit from today’s Saturday Showcase featuring noted huntress and outdoor video host Kristy Titus. Titus, co-host of the Team Elk TV show, is a certified instructor who has hunted around the globe. She grew up in the outdoors, running pack mules in Oregon with her father.

Successful Hunts with Kristy Titus and Field Dressing Methods

Kristy has her own successful YouTube Channel, Pursue the Wild with Kristy Titus. Here are three popular videos on that channel. Kristy’s field dressing video has amassed over 5.7 million views!

Best of North American Big Game Hunting

Caribou Hunting in the Northwest Territories

Gutless Field Dressing Method

Hunters who are deep in the backcountry may need to quarter the animal for easier field removal and to help cool the meat as quickly as possible. In this video, Kristy Titus shows the step-by-step process of the gutless method. Kristy recommends a good skinning knife such as the Buck Knives Pursuit Series. She also states you should have quality game bags plus a section of Polyethylene Visqueen material which can be purchased at local hardware stores.

Shooting Skills and Tactics for Hunters with Kristy Titus

As part of NRA Women TV, hunting guide Kristy Titus hosts a series of videos that explain important strategies and shooting skills for hunters. In these videos, Kristy demonstrates field positions that can be employed during a hunt. She also explains preparation for a hunt, including fitness training.

Click each link below to watch other Kristy Titus Hunting Videos.

Kristy says: “When it comes to bolt-action rifle fit, there is no ‘one size fits all’. When picking out your rifle [consider options] after the purchase to ensure you are as comfortable as possible.”

If you are evaluating a firearm for self-defense use, you should consider three main factors: Reliability, Functionality (sights, trigger, ergonomics), and Effectiveness (ability to halt/neutralize threats). Regarding effectiveness, you need to consider what happens when the projectiles from your firearm reach the target. That involves penetration and terminal ballistics.

A 12ga shotgun is very effective inside 20 yards, with less risk of over-penetration* vs. a centerfire rifle.

You’ve probably heard the term “Terminal Ballistics”. But do you really know what this refers to? Fundamentally, “Terminal Ballistics” describes the behavior of a projectile as it strikes, enters, and penetrates a target. Terminal Ballistics, then, can be said to describe projectile behavior in a target including the transfer of kinetic energy. Contrast this with “External Ballistics” which, generally speaking, describes and predicts how projectiles travel in flight. One way to look at this is that External Ballistics covers bullet behavior before impact, while terminal ballistics covers bullet behavior after impact.

The study of Terminal Ballistics is important for hunters, because it can predict how pellets, bullets, and slugs can perform on game. This NRA Firearm Science video illustrates Terminal Ballistics basics, defining key terms such as Impact Crater, Temporary Cavity, and Primary Cavity.

External Ballistics, also called “exterior ballistics”, is the part of ballistics that deals with the behavior of a non-powered projectile in flight.

Terminal Ballistics, a sub-field of ballistics, is the study of the behavior and effects of a projectile when it hits its target.

*This Shooting Illustrated article discusses over-penetration risks with a variety of cartridge types. “A bullet passing through a threat and continuing with the potential to cause unintentional damage to a bystander or object is a situation commonly described as over-penetration.”

Hunting season is underway now across the country. You’ll definitely want to zero your hunting rifle before the hunt, and you need to know how your shots will impact with a cold barrel.

Commonly, hunters won’t have the ability to fire one or two fouling shots before heading out on a hunt. Therefore it’s important that a hunter understands how his rifle shoots with a “cold bore shot”. Both the point of impact (and possibly velocity), may be different with a cold bore than with a barrel that has been warmed and fouled with a series of shots. In this video from the U.S. Army Marksmanship Unit (USAMU), you’ll learn how to determine your cold bore point of impact (POI) for a rifle that just been cleaned, as well as the cold bore POI with a barrel that has already been “fouled in”.

SGT Joe Hein of the USAMU shows how to plot cold bore POI with both a clean bore and a fouled bore. Note that the “cold bore” shot from a fouled barrel was closer to the follow-up shots than the cold bore shot from a clean barrel. This is typical of many factory barrels. SGT Hein provides a simple way to understand your rifle’s cold bore performance. Hein’s advice can keep you from missing that long range shot at that big buck on opening day. A little time spent on the range before that critical first shot will help ensure you have meat in the freezer this season.