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December 11th, 2022

TECH Tip — 30 BR Case-Forming Explained by Experts

30BR 30 BR case forming benchrest randy robinette al nyhus

30BR 30 BR case formingThe 30BR is an amazing little cartridge. However, 30BR shooters do have to neck-up 6mmBR brass and then deal with some issues that can arise from the expansion process. One of our Forum members was concerned about the donut that can form at the new (expanded) neck-shoulder junction. Respected bullet-maker Randy Robinett offers tips on how to deal with the “dreaded donut”.

The Forum member was concerned about thinning the brass if he turned his 30BR necks after expansion: “Everything I have found on 30BR case-forming says to simply turn off the bulge at the base of the neck caused by the old 6BR shoulder. I expanded my first case and measured the neck at 0.329″ except on the donut, where it measures 0.335″. Looking inside the case… reveals a groove inside the case under the donut. Now, it is a fact that when I turn that neck and remove the donut, the groove is still going to be there on the inside? That means there is now a thin-spot ring at the base of the neck that is .005 thinner than the rest of the neck. Has anyone experienced a neck cracking on this ring?”

Randy Robinett, who runs BIB Bullet Co., is one of the “founding fathers” of the 30BR who help prove and popularize the 30 BR for benchrest score shooting. Randy offers this advice on 30BR case-forming:

While the thinner neck-base was one of our original concerns, unless one cuts too deeply INTO the shoulder, it is not a problem. For my original 30BR chamber, thirty (30) cases were used to fire 6,400 rounds through the barrel. The cases were never annealed, yet there were ZERO case failures, neck separations, or splits. The case-necks were turned for a loaded-round neck diameter of .328″, and, from the beginning, sized with a .324″ neck-bushing.

The best method for avoiding the ‘bulge’ is to fire-form prior to neck-turning (several methods are successfully employed). Cutting too deeply into the shoulder can result in case-neck separations. I have witnessed this, but, with several barrels and thousands to shots fired, have not [personally] experienced it. The last registered BR event fired using that original barrel produced a 500-27x score and a second-place finish. [That’s] not bad for 6K plus shots, at something over 200 firings per case.

Check out the 30BR Cartridge Guide on AccurateShooter.com
You’ll find more information on 30BR Case-forming in our 30 BR Cartridge Guide. Here’s a short excerpt from that page — some tips provided by benchrest for score and HBR shooter Al Nyhus:

30BR Case-Forming Procedure by Al Nyhus
The 30BR cartridge is formed by necking-up 6BR or 7BR brass. You can do this in multiple stages or in one pass. You can use either an expander mandrel (like Joe Entrekin does), or a tapered button in a regular dies. Personally, I use a Redding tapered expander button, part number 16307. This expands the necks from 6mm to .30 cal in one pass. It works well as long as you lube the mandrel and the inside of the necks. I’ve also used the Sinclair expander body with a succession of larger mandrels, but this is a lot more work and the necks stay straighter with the Redding tapered button. This button can be used in any Redding die that has a large enough inside diameter to accept the BR case without any case-to-die contact.

Don’t be concerned about how straight the necks are before firing them the first time. When you whap them with around 50,000 psi, they will straighten out just fine! I recommend not seating the bullets into the lands for the first firing, provided there is an adequate light crush-fit of the case in the chamber. The Lapua cases will shorten from approx. 1.550″ to around 1.520″ after being necked up to 30-caliber I trim to 1.500″ with the (suggested) 1.520 length chambers. I don’t deburr the flash holes or uniform the primer pockets until after the first firing. I use a Ron Hoehn flash hole deburring tool that indexes on the primer pocket, not through the case mouth. — Al Nyhus

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December 8th, 2022

Cartridge Headspace 101 — Understanding the Basics

Brownells Headspace Gauge cutaway chamber drawing SAAMI ANSI

Do you know what the inside of a rifle chamber (and throat zone) really looks like? Do you understand the concept of headspace and why it’s important? If not, you should read the Brownells GunTech article Gauging Success – Minimum Headspace and Maximum COL. This article explains the basics of headspace and shows how to measure headspace (and length to lands) in your barrels with precision. The article also explains how to adjust your full-length sizing dies to “bump the shoulder” as needed.

Why is headspace important? The article explains: “Controlling headspace and setting proper C.O.L. also represent improved safety and reduced cost of handloading. Excessive headspace can cause case head separation and gases in excess of 60,000 PSI escaping from a rifle’s chamber. Too little headspace can result in a chamber forced bullet crimp and a bullet that becomes an obstruction more than a properly secured projectile. Excessive C.O.L. can result in a rifling-bound bullet, a condition that could result in spikes of excessive pressure.” [Editor’s NOTE: It is common for competitive benchrest shooters to seat bullets into the rifling. This can be done safely if you reduce your loads accordingly. With some bullets we often see best accuracy .010″ (or more) into the lands. However, this can generate more pressure than the same bullet seated .010″ away from initial lands contact. As with all reloading, start low and work up gradually.]

Brownells Headspace Gauge cutaway chamber drawing SAAMI ANSI

How is headspace specified? Most cartridges used within the United States are defined within ANSI/SAAMI Z299.3-4. Brownells explains: “In the case of the .243 Winchester, as an example, there are pressure specifications, cartridge drawings and, as pictured above, chamber drawings. Armed with a chamber drawing, each manufacturer producing a firearm for the .243 Winchester knows the proper standard dimension to cut chambers and set headspace. Notice there are two headspace reference dimensions for the chamber. The upper is a place in the chamber where the shoulder is .400″ in diameter; the “datum” or “basic” line. The lower is the 1.630″~1.640″ minimum – maximum dimension from the breech face (bolt face) to that point in the chamber that measures .400″.”

The actual headspace of any firearm is the distance from the breech face to the point in the chamber that is intended to prevent forward motion of a cartridge.

Finding Cartridge Length to Lands with OAL Gauge
Using a comparator on a set of calipers, you can quickly determine cartridge base-to-ogive length. This is the measurement from the base of the case to the forward-most full diameter section of the bullet, typically called the ogive. Shown here, that ogive is 0.243″ diameter.

The next step is using a modified (threaded) case with a Hornady OAL tool to determine Length-to-Lands (LTL) in your rifle’s chamber. During this measurement process, the modified case, with a bullet in its neck, is inserted in the chamber. Go slow, take your time. Here are 5 tips that will help you get repeatable and reliable LTL measurements:

1. Start with a clean chamber and clean barrel throat.
2. Make sure the modified case is fully screwed down and seated on the OAL Gauge. It can sometimes unscrew a bit during repeated measurements.
3. Insert the modified case slowly and gently, but ensure the shoulder of the modified case is fully seated on the end of the chamber.
4. Push the gray plastic rod GENTLY. It is common for the bullet to be tilted a bit. You want to allow the bullet to self-center in the throat BEFORE you apply much pressure. Then tap a couple times and push until you feel resistance. Do NOT push too hard — that will jam the bullet in the lands.
5. Repeat the measurement at least 3 more times. If you follow our instructions, you should, typically, get a repeatable measurement, within 0.0015″ or so, 3 out of 4 times.

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December 7th, 2022

CCI Commences Lead-Free Primer Production in Idaho

cci speer federal ammunition catalyst unleaded no-lead primer priming ammunition

CCI is now producing Catalyst lead-free primers and Catalyst-primed CCI and Speer ammunition at the CCI factory in Lewiston, Idaho. The proprietary Catalyst lead-free primer was first developed in 2016 by Federal Ammunition, a CCI/Speer partner company. The advanced lead-free Catalyst primers are being used in CCI- and Speer-brand pistol ammo, and may eventually be sold separately for the reloading market.

Writing for the MagLife Blog, Kat Ainsworth described Catalyst lead-free primers: “Many manufacturers use lead styphnate mixtures in the production of primers, but Federal Ammunition states the proprietary design utilized in the Catalyst is not only lead-free but outperforms those other methods. The company also says the Catalyst primers are safer to manufacture and provide a host of benefits over lead designs. For example, the Catalyst primers deliver greater compatibility with modern powders, produce less pressure from the gases generated during live fire, and don’t cause degradation in the powder they touch.

The company says these primers are extremely clean-burning which helps them perform more uniform and complete propellant combustion. Even better, the Catalyst has minimal velocity variation[.] These primers are also non-hydrophilic, meaning they don’t attract water molecules like DDNP-based mixes that are found in other brands[.]”

cci speer federal ammunition catalyst unleaded no-lead primer priming ammunition

Catalyst Primers Promise Best-in-Class Performance
“We are extremely proud of this new production capability which continues the rollout of an incredible primer technology” said Federal/CCI/Speer President Jason Vanderbrink. “This product has proven to be the best in its class after nearly seven years of continuous production. Its consistent performance has been tested over hundreds of millions of rounds. Most notably, the product is featured in Federal’s innovative Syntech Range ammo and American Eagle Lead-Free.”

The extremely clean-burning Catalyst primer creates more uniform and complete propellant combustion, yielding minimal velocity variation and consistent bullet launch for improved accuracy. It is also non-hydrophilic, so it does not attract water molecules like DDNP-based mixes found in most lead-free primers, resulting in better reliability.

“Catalyst lead-free priming technology provides the cleanest, most consistent ignition possible. We are excited that our Lewiston plant is now set up to run Catalyst priming in our target pistol products”, said Speer and CCI’s Director of Factory Operations Mike Overberg. “The Anoka facility has proven this to be the best lead-free priming technology available. Our staff here has done a fantastic job of working across factories to extend this product into Speer and CCI Blazer ammunition products made in Lewiston, Idaho.”

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December 4th, 2022

Top Gear Choices for 100/200 Benchrest — The Winning Formula

IBS Group Benchrest Nationals Jeff Stover IBS

The Rifle for Short-Range Benchrest Competition

Hardware Choices: Actions, Stocks, Barrels, Optics and More
Tech Talk by Jeff Stover

This article was prepared by past IBS President Jeff Stover based on results from the 2019 IBS 100/200 Group Nationals held August 12-17, 2019 at the Holton Gun & Bow Club in western Michigan.

Let’s examine the Top Ten rifles from the 2019 IBS Group Nationals in the 10.5-lb Light Varmint Class. We’ll focus on the most popular rifle components — the choices for Actions, Stocks, Barrels, and Scopes.

IBS Group Benchrest Nationals Jeff Stover IBS

IBS short range 100/200 group benchrest
Hall of Famer Jeff Gaidos taking aim at the 2018 IBS Group Nationals. He has a low-profile carbon-fiber stock with a Leupold fixed-power scope.

For some years now, BAT has been the predominant action. This year BAT actions held nearly 100% of the Top Ten places in all the Bag Gun equipment lists. Bruce Thom’s Idaho-crafted actions, except for a couple stray actions in Heavy Bench, swept the top rankings.

IBS Group Benchrest Nationals Jeff Stover IBS

Next, look at barrels. Bartlein or Krieger seem to rule with upstate New York’s venerable Hart barrels as competitive. Shooters tend to go with winners, so Wayne Campbell and Jeff Peinhardt dominate as gunsmiths for the top benchrest shooters.

In stocks there seems to be variety, but there is some commonality. The Scoville and Scarbrough stocks, both Michigan-made, are laminated wood (balsa and other wood) with carbon fiber and wrapped in carbon fiber. The Scoville stock on my 10.5-lb rifle weighs 18 ounces but is full size with a nice long fore-end. Bob Scarbrough makes a very similar product. Both are winners — it’s a choice of Ferrari or Lamborghini. The Roy Hunter and Terry Leonard stocks among these top rifles take a different route to winner’s circle. Both are wood (cedar or other), but super high-tech as they are laminated with carbon fiber. They are beautiful to boot. High-magnification Leupold, March, and Nightforce scopes rule the roost among benchrest optics.

IBS Benchrest rifle stock tuner

IBS benchrest loading table powder

Bullets and Powder

Bullets are important. Really important. A hot bullet gives you “Teen Aggs” and lots of trophies. An average bullet does not. Most of these are 68 grain 6mm boattails. The Peinhardt (StaMoly Precision) bullet is well represented on this list, but some top shooters make their own as you can see. Bullet jackets are likely StaMoly or J4. For powder, nearly everyone shoots Vihtavouri N133 except a few guys running LT30/32 or surplus 8208.

Vihtavuori N 133 N133 powder reloading

IBS Benchrest wailing wall targets

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November 26th, 2022

Best Ammo Carrier for Rimfire Ammunition — All Types

rimfire box mtm ammo

For centerfire ammo, you can choose from dozens of flip-top boxes, storage bins, or milsurp-style ammo cans. For rimfire ammo, there are not so many good choices. Our preferred rimfire ammo carrier is the MTM SB-200 Small-Bore Fitted Ammo Box. This flip-top plastic box holds 100 rimfire rounds in black grids on the left and right. Each side has five rows left to right, holding ten rounds per row front to back (for 50 rounds per side). In the center is a storage area that will hold another 100 rounds in factory boxes. Current price is $13.15 on Amazon.

Versatility for ALL Types of Rimfire Ammo
MTM’s SB-200 box is not just for .22 LR ammunition. This handy carrier will hold .17 HMR rounds, as well as .17 Mach 2, .22 Short, .22 Win Mag Rimfire, and of course .22 Long Rifle (.22 LR). This box is a winner — it has a low profile, holds rounds securely, and the center storage feature is smart.

MTM Case-Gard 200 Round Smallbore Box
This is really the only product of its kind on the market. It allows you to conveniently and securely hold 200 rimfire rounds, and also segregate your ammo by brand or bullet type. These boxes fit all types of popular rimfire ammunition. The vertical clearance of the lid is sufficient to hold the longer .22 WMR Rounds, and 17 HMR (as well as .22 LR naturally). The lid fits securely so you don’t have to worry about your rimfire ammo spilling out on the way to the range.

If you don’t have one of these boxes yet, we recommend you order one or two. They cost less than $15.00 and are available in Blue or “Rust” (a brick color).

rimfire box mtm ammo rimfire box mtm ammo

Bottom image courtesy Mountain High Trading Company eBay store.

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November 24th, 2022

Black Friday Bargains — Huge Savings at Leading Vendors

Black Friday Deals bargain sale discount

Happy Thanksgiving folks. Many major manufacturers and online vendors are offering great bargains tomorrow, Black Friday. And many of the sales have already started and last through Cyber Monday. In fact, some of the best deals at leading vendors EuroOptic and Grafs.com continue well into December.

We are spotlighting vendors worth visiting because they offer a wide range of discounts on a large inventory selection — in some cases, everything in stock is discounted 10%, 15%, 25% even 40%. For other sellers, only specific items are on sale, so we’ve identified some of the best deals. In addition to these deals Brownells is offering big Discount Code savings. Get $45 OFF a $225+ order with Code BF45OFF or 15% OFF a $600+ order with Code BFSAVE15.

Come back tomorrow, as we will add some additional Black Friday promotions not yet announced.

21st Century Innovation 20% Off 4-Day Sale

Black Friday Sale discount 20% 21st Century innovation

21st Century Innovation makes some of the very best tools and hardware for precision handloaders. 21st Century’s Arbor Presses, Neck-turning lathes, Concentricity Gauges, and other tools rank at the very top. And now you can get these superb products at a huge 20% discount. Virtually all 21st Century hardware (except the Hybrid Shooting Rest) will be 20% OFF for four days, November 25 through November 29. Use Code BLKFRI during check-out to save 20%.

EuroOptic — Black Friday + December Extended Nightforce Sale

nightforce sale discount 10% eurooptic black friday november december

Now through December 31, 2022, EuroOptic is running a major sale on Nightforce Optics. Save 10% on most regularly priced Nightforce NXS and SHV riflescopes November 18th through December 31st, 2022. CLICK HERE to access Nightforce optics on sale.

Midsouth Shooters Supply Black Friday Sale

Black Friday Sale discount Midsouth Shooters

Midsouth is one of our favorite vendors. This company respects its customers and has maintained fair pricing even during the shortages. We will update this listing with specific hot deals as soon as they are posted. Special sale items with discounted prices should be revealed at 12:01 am ET 11/25/2022.

Bruno Shooters Supply — 10% Off Sitewide, with FREE Shipping

Bruno shooters supply black friday sale free shipping

Bruno’s Black Friday Sale is underway already and runs through November 28. Bruno’s is offering “At Least 10% Off or more” for the vast majority of Bruno’s listed products. This includes optics, Kelbly actions, powder, primers, bullets, brass, dies, presses, tumblers, and more. There are extra big discounts on Norma brass. Plus you get FREE Shipping with most orders of $100 or more. These discounts are good now through Monday, November 28, 2022 at 8:00 am. NOTE: HazMat fees still apply.

Graf & Sons — Major Sale November 23 through December 9

Graf graf's sons black friday sale free shipping

Graf & Sons is running Extended Black Friday sale with discounts and special offers now through Friday December 9, 2022. For example, save 26% on a Lyman Case Prep Express, or get FREE shipping on your entire order when you buy a Forster Co-Ax press. CLICK HERE for featured deals.

Palmetto State Armory Black Friday Sale

Black Friday Cyber Monday Palmetto Armory Sale

If you’re in the market for an AR-type rifle or a handgun, head straight over to Palmetto State Armory (PSA). You’ll find incredibly low prices on stripped AR lowers, as well as fully assembled uppers and complete Black Rifles. In addition, PSA has a wide selection of quality pistols at very attractive prices, plus dozens of Black Friday Ammo Deals. You can CLICK HERE for all the Black Friday Specials.

Bullet Central Black Friday Sale

Bullet Central Black Friday Sale trigger scopes barrels

Bullet Central is a leading vendor for rifle accuracy fans. And right now you can get significant savings on prefit barrels (Krieger and other), airgun packages, triggers, and other products. CLICK HERE for Bullet Central Black Friday Sale items.

Area 419 — Black Nitride Friday Sale Through 11/29/2022

 Black nitride Friday Cyber Monday Area 419 muzzle brakes Zero press

Area 419 is running a “Black Nitride Friday” promotion. There are major savings on a variety of great products including Hellfire muzzle brakes, Sidewinder muzzle brakes, suppressor mounts, thread protectors, and more. In addition, the outstanding Area 419 Zero Turret Reloading press is $100.00 off, marked down to $1175.00. CLICK HERE for all Area 419 sale items.

Bass Pro & Cabela’s Black Friday Sale Through November 27

Black Friday Cyber Monday Sale bass pro cabelas

You’ll find plenty of great deals at Bass Pro and Cabela’s stores and their respective web sites. Save big on firearms, ammo, and targets now through Sunday, November 27, 2022. There are also discounts on outdoor clothing, camping gear, optics and more. This Black Friday promotion also celebrates Bass Pro’s 50th year in business.

Tractor Supply Co. Black Friday Sale — Gun Safes

Black Friday Cyber Monday Palmetto Armory Sale

Tractor Supply Co. is a respected vendor with stores around the country. Right now Tractor Supply has dozens of Black Friday specials, but the deeply discounted gun safes caught our attention. You can save $200-$300 on Cannon, Liberty, and Winchester safes now through Saturday, November 26, 2022.

Springfield Armory Black Friday Sale

Black Friday Cyber Monday springfield armory pistol rifles M1A

Springfield Armory has a storewide “Black Friday” 20% discount, running from Thursday, November 24th (Thanksgiving) through Monday, November 28th. This discount does not require a Promo Code and is automatically applied at checkout to make the purchasing process as simple and easy as possible. Recently updated, the online Springfield Armory Store has as a broad selection of products. If you want a new M1 air rifle, optic, holster, knife or other accessory, you’ll find it here. The 20% off does NOT apply to FFL sales of Springfield Armory centerfire rifles and pistols.

5.11 Tactical Store Black Friday Sale

Black Friday Cyber Monday 5.11 Tactical Sale

Respected outdoor gear/clothing supplier 5.11 Tactical is running a major Black Friday Sale through Tuesday, 11/29/2022. Save 20-40% on backpacks, jackets, pants, and footwear. Other outdoor gear, including gun cases, belts, gloves, watches, and multi-tools are also on sale.

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November 22nd, 2022

Bullet Flight Video Reveals Shock Wave and Bullet Base Drag

Science Accuracy Academy bullet video Schlieren movie shock wave capture

Ever wondered what the air around a moving supersonic bullet really looks like? Check out this video from the Bryan Litz Ballistics Facebook page. This is a Schlieren video* of a 6mm 109gr Berger LRHT bullet at about 2800 fps as fired from Francis Colon’s PRS rifle at the Applied Ballistics Lab.


Bryan Litz notes: “You can clearly see the compression (shock) wave at the front of the bullet. A compression wave is formed when the air has to move faster than the speed of sound to get out of the way, which is certainly the case for this bullet which is moving about 2.5 times the speed of sound (Mach 2.5).

That shock wave is the ‘snap’ you hear when bullets fly past you if/when you’re downrange. Also, compressing the air into a shockwave takes energy, and that energy comes directly out of the forward velocity of your bullet and gets converted into heat and noise as the shock wave forms and dissipates.

The turbulent wake at the base of the bullet shows where/how base drag applies. The third and smallest component of drag for a supersonic bullet is skin friction drag, which is a viscous boundary layer effect, and is the least visible in this image. So as you head to the range or the hunting stand, think about the absolute violence your bullets are committing in the atmosphere, before they even reach the target!”

Subscribe to the Science of Accuracy Academy for more precision rifle and long range shooting content. LINK: TheScienceofAccuracy.com.

Science of Academy Contest
The Science of Accuracy Academy is currently running a contest for new subscribers. The winner receives a Vortex Fury HD 5000 Laser Rangefinder Binocular unit with Applied Ballistics functionality. Act soon — the deadline to enter is November 23, 2022 at 1:00 pm Eastern.

Science Accuracy Academy vortex rangefinder binoculars contest prize bryan litz


* Schlieren imaging makes air flow features visible. SEE Schlieren Photography Wikipedia page.

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November 21st, 2022

How Altitude and Barometric Pressure Affect Projectile Ballistics

altitude ballistics zeiss LRP S5 318-50 FFP scope
Photo shows the new ZEISS LRP S5 318-50 first focal plane (FFP) scope.

“A bullet launched at a higher altitude is able to fly slightly farther (in the thinner air) for every increment of downward movement. Effectively, the bullet behaves as if it has a higher ballistic coefficient.”

Last month a good friend ventured to the high country of Colorado to pursue elk. He recently zeroed his rifle in California, at a range just a few hundred feet Above Mean Sea Level (AMSL). He wondered if the higher altitude in Colorado could alter his ballistics. The answer is a definite yes. However the good news is that free ballistics calculators can help you plot reliable drop charts for various shooting locations, high or low.

Suunto AltimeterThe question has been posed: “What effect does altitude have on the flight of a bullet?” The simplistic answer is that, at higher altitudes, the air is thinner (lower density), so there is less drag on the bullet. This means that the amount of bullet drop is less at any given flight distance from the muzzle. Since the force of gravity is essentially constant on the earth’s surface (for practical purposes), the bullet’s downward acceleration doesn’t change, but a bullet launched at a higher altitude is able to fly slightly farther (in the thinner air) for every increment of downward movement. Effectively, at higher altitudes, the bullet behaves as if it has a higher ballistic coefficient.

Forum member Milanuk explains that the key factor is not altitude, but rather air pressure. Milanuk writes:

“In basic terms, as your altitude increases, the density of the air the bullet must travel through decreases, thereby reducing the drag on the bullet. Generally, the higher the altitude, the less the bullet will drop. For example, I shoot at a couple ranges here in the Pacific Northwest. Both are at 1000′ AMSL (Above Mean Sea Level) or less. I’ll need about 29-30 MOA to get from 100 yards to 1000 yards with a Berger 155gr VLD at 2960 fps. By contrast, in Raton, NM, located at 6600′ AMSL, I’ll only need about 24-25 MOA to do the same. That’s a significant difference.

Note that it is the barometric pressure that really matters, not simply the nominal altitude. The barometric pressure will indicate the reduced pressure from a higher altitude, but it will also show you the pressure changes as a front moves in, etc. which can play havoc w/ your calculated come-ups. Most altimeters are simply barometers that read in feet instead of inches of mercury.”

As Milanuk states, it is NOT altitude per se, but the LOCAL barometric pressure (sometimes called “station pressure”) that is key. The two atmospheric conditions that most effect bullet flight are air temperature, and barometric pressure. Normally, humidity has a negligible effect. It’s important to remember that the barometric pressure reported on the radio (or internet) may be stated as a sea level equivalency. So in Denver (at 6,000 feet AMSL), if the local pressure is 24″, the radio will report the barometric pressure to be 30″. If you do high altitude shooting at long range, bring along a Kestrel, or remember to mentally correct the radio station’s pressure, by 1″ per 1,000 feet.

Trajectory of Bullet fired at Sea Level

Trajectory of Bullet fired at 20,000 feet

You can do your own experimental calculations using JBM Online Ballistics (free to use). Here is an extreme example, with two printouts (generated with Point Blank software), one showing bullet trajectory at sea level (0′ altitude) and one at 20,000 feet. For demonstration sake, we assigned a low 0.2 BC to the bullet, with a velocity of 3000 fps.

To learn more about all aspects of Exterior Ballistics, Hornady has a useful discussion of External Ballistics including the effects of altitude and temperature. To dig deeper, Sierra Bullets has a comprehensive Exterior Ballistics Resource Page with multiple sections from the Sierra Manual (4th and 5th Editions), including:

Section 3.0: Exterior Ballistic Effects on Bullet Flight
Section 3.1: Effects of Altitude and Atmospheric Conditions
Section 3.2: Effects of Wind
Section 3.3: Effects of Shooting Uphill or Downhill

Example from Section 3.0: “When a bullet flies through the air, two types of forces act on the bullet to determine its path (trajectory) through the air. The first is gravitational force; the other is aerodynamics. Several kinds of aerodynamic forces act on a bullet: drag, lift, side forces, Magnus force, spin damping force, pitch damping force, and Magnus cross force. The most important of these aerodynamic forces is drag. All the others are very small in comparison when the bullet is spin-stabilized.”

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November 19th, 2022

Saturday at the Movies: Shooting Products Factory Showcase

Saturday movies video factory showcase BAT Machine Norma SAKO ZEISS Nosler

Ever wonder how rifles, actions, stocks, optics, suppressors, and ammo components are produced in factories around the world? Today’s Saturday at the Movies installment features fascinating videos filmed inside major firearms industry factories including BAT Machine, ZEISS, Norma, SAKO, Nosler, CCI and Federal.

BAT Custom Rifle Actions — Factory Tour and Owner Interview

BAT Machine Co. makes some of the finest custom actions you can buy. Numerous national and world records have been set with BAT actions. To create this video, Ultimate Reloader’s Gavin Gear visited the BAT Machine production center in Post Falls, Idaho. Gavin talked with BAT’s founder Bruce Thom. The video features extensive footage of advanced CNC machines used to produce the superb BAT actions. If you own a BAT action, or hope to acquire one some day, definitely watch this video. CLICK HERE for Full Story.


YouTube Ultimate Reloader Video BAT Machine

Norma Ammunition Factory — Cartridge Creation Start to Finish

Norma has released a fascinating video showing how bullet, brass, and ammunition are produced at the Norma Precision AB factory which first opened in 1902. You can see how cartridges are made starting with brass disks, then formed into shape through a series of processes, including “hitting [the cup] with a 30-ton hammer”. After annealing (shown at 0:08″), samples from every batch of brass are analyzed (at multiple points along the case length) to check metal grain structure and hardness. Before packing, each case is visually inspected by a factory worker.

The video also shows how bullets are made from jackets and lead cores. Finally, you can watch the loading machines that fill cases with powder, seat the bullets, and then transport loaded rounds to the packing system. Guys, watch this video! You won’t be disappointed. The camera work and editing are excellent — there are many close-ups revealing key processes such as annealing and head-stamping.


Norma factory ammo production video

SAKO Factory Tour in Finland

SAKO produces some of the best hunting rifles you can buy. SAKO, along with its sister company Tikka, operates sophisticated production facilities in Finland. In the video below, Canadian journalists visit the SAKO factory where rifles are made. It is interesting to see how stocks are made and barrels are bored and contoured. SEE More HERE.


Sako finland rifle factory tour

Nosler Bullet Manufacturing

Nosler bullets nosler.com website ecommerce

Ever wanted to see how Nosler bullets and cartridges are made? Here’s your opportunity. The Rocky Mountain Elk Foundation (RMEF) has produced a video (“Quality First”) that offers a behind-the-scenes look inside Nosler’s Oregon factory that produces bullets, brass, and ammunition. RMEF representatives visited Nosler’s famously-guarded manufacturing plant to show the technology used by Nosler to produce bullets and ammunition. After the intro, this video illustrates Nosler’s bullet construction techniques with a cool animation sequence. The video then showcases the Nosler ballistics lab, inspection room, and packaging line. SEE more HERE.

Video Showcases Nosler Production Facility and Ballistics Lab

ZEISS Sport Optics

ZEISS is a world leader in lens and optics technology. Along with ultra-high quality lenses used in production of computer chips and special optics for high-tech medical equipment, ZEISS produces great optics for hunters and shooters. ZEISS lenses are renowned for their sharpness, clarity, and high light transmission. ZEISS has a new series of LRP S3and LRP S5 First Focal Plane scopes which promise to be favorites among PRS/NRL competitors and long-range hunters.

Silencerco Suppressor Fabrication Start to Finish

Here’s a cool video that shows the entire production process for a SilencerCo Octane pistol suppressor start to finish. Beginning with the raw materials, this video shows a wide variety of cutting, milling, drilling, burnishing, fitting, metal bathing, surface finishing, and laser etching processes. If you have any interest in production methods you’ll want to watch this video all the way through, and maybe a second time.

Computer-Controlled Milling
Silencerco suppressor factory video production metal fabrication can silencer baffle
Hand-Finishing Internal Components
Silencerco suppressor factory video production metal fabrication can silencer baffle

Rimfire Ammo Production at CCI/Speer and Federal Factories

YouTube host 22Plinkster got a chance 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 is a fascinating video, well worth watching.

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.

Field & Stream Tours Federal Ammo Plant in Minnesota
A while back Field & Stream 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.

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

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.

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November 19th, 2022

Rimfire 101 — What Causes Misfires and How to Prevent Them

rimfire Ammo 22 plinkster cheaper than dirt

“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”.

rimfire Ammo 22 plinkster cheaper than dirt

Top Image courtesy Cheaper Than Dirt Shooters Log.

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November 18th, 2022

Reloading with Progressive Presses — 10 Tips for Good Results

6.5 Guys Progressive Press video Gavin Gear Ultimate Reloader

Progressive reloading presses offer shooters speed and efficiency in producing custom-tailored rifle and pistol ammunition. However, there is a wide choice of Progressive Presses and a bewildering array of options to consider. In this video, the 6.5 Guys and UltimateReloader.com’s Gavin Gear provide an overview of the leading Progressive Presses on the market along with key considerations for precision rifle shooters. If you are considering getting a Progessive for rifle ammo reloading, you should watch this informative, 25-minute video.

10 Tips for Reloading Rifle Ammo on a Progressive Press:

1. Make sure the brass is very clean. Don’t mix old range pick-up brass with newer brass.

2. Apply a thin, spray lube to all cases before the sizing/loading cycle.

3. Consider priming your brass separately (with a hand or bench tool) before the operation. Then inspect the primers before loading powder and bullets.

4. Always wear eye protection when loading with the Progressive, particularly if you are priming cases.

5. With masking tape, mark the powder measure/dropper with the powder type and cartridge charge weight. Check the charge mass multiple times (see below).

6. Cycle a few cases, sizing and adding powder but NOT seating bullets. Weigh the powder charges to ensure the powder measure is dispensing the correct charge. Sometimes this will change a couple tenths as it “settles down” after the first few charges.

7. Check the brass for shoulder bump and bullet seating depth carefully for the first few rounds, then check again periodically.

8. Try to maintain a steady pace and operate the handle the same way every time.

9. Visually inspect the powder charge in each case (before bullet seating), and use a lock-out die if your Progressive Press has enough stations.

10. Never, ever mix pistol and rifle powders! If you have previously loaded pistol ammo with your Progressive, make sure ALL the powder (every flake and kernel) is removed from all parts of the powder-dropping system before you add rifle powder.

Visit these sites for more Reloading and Precision Shooting Videos:

6.5 Guys
https://www.youtube.com/user/65guys
http://www.65Guys.com

Ultimate Reloader
https://www.youtube.com/ultimatereloader
http://www.UltimateReloader.com

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November 16th, 2022

De-Crimp MIL Brass Primer Pockets with LEE Ram Swage Tool

lee single stage ram swage primer pocket crimp remover die

Do you ever use military-style brass with swaged primer pockets? Then you can really benefit from the new LEE Ram Swage tool. This innovative swaging tool provides a fast, simple, and efficient method of removing the primer pocket crimp on milsurp brass.

Primer pocket swaging is necessary when reloading brass with crimped primer pockets. Many brands of brass for military (and some law enforcement) applications have this crimp. You may find such primer pocket crimps on a variety of milsurp brass types including: 9mm Luger, LEO .40 S&W, .45 ACP, .223 Rem (5.56×45), .308 Win (7.62×51), and .30-06 Springfield, as well as older European cartridge types such as 6.5×55. If you use a progressive press, this new LEE Ram Swage is a boon. Nothing reduces priming problems on a progressive press more than properly swaged primer pockets.

Why use milsurp brass? Surplus military and police department brass is a great low cost source of cases. It is typically very strong, long-lasting, and can often be acquired for a fraction of the cost of new commercial brass. For example, Lake City 7.62×51 (.308 Win) brass is excellent.

lee single stage ram swage primer pocket crimp remover die
Note: This tool is designed for Boxer-primed cases only, not cases with Berdan Primers.

lee single stage ram swage primer pocket crimp remover dieThe Lee Ram Swage works on all single stage presses with 7/8″-14 frame threads, and rams which take common “universal” shell-holders. This new tool features spring-assisted case extraction, and an all-steel case guide. This ensures that your cases will be positively centered on the push rod. The swage holder, large or small, installs in seconds into your press ram with no adjustments required.

LEE’s engineers devised a clever “Shell-holderless design” for the LEE Ram Swage. This allows you to swage any small or large primer pocket, without swapping to a different size shell-holder. The hardened steel swage punch is automatically extracted from the primer pocket by five disc springs. The complete LEE Ram Swage set includes one guided 7/8″-14 threaded swage push die, with both large and small ram swage holder assemblies.

Product instructions:
LEEprecision.com/files/instruct/PA4914.pdf

Parts List/Diagrams:
LEEprecision.com/primer-pocket-swage-parts/

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