Here’s an inexpensive procedure that can help you load straighter ammo, with slightly better measured concentricity (i.e. less run-out) on the case necks and bullets. Simply use a Rubber O-Ring on the underside of the die locking ring. This allows the die to self-align itself (slightly) to the case that is being sized. Without the O-Ring, if the flat surface on the top of your press is not perfectly square with the thread axis, your die can end up slightly off-angle. This happens when the bottom of the locking ring butts up tight against the top of the press. The O-Ring allows the die to float slightly, and that may, in turn, reduce the amount of run-out induced during case sizing.
Top prone shooter GSArizona, who sadly passed last year, tried this trick and said it works: “Go to your local hardware store and get a #17 O-Ring (that’s the designation at Ace Hardware, don’t know if its universal). Slip the O-Ring on the die and re-adjust the lock ring so that the O-Ring is slightly compressed when the die is at the correct height. Size and measure a few more cases. You will probably see a slight improvement in neck concentricity as the die can now float a bit as the case enters and leaves it. This isn’t going to be a dramatic improvement, but it’s a positive one.”
We want to stress that adding O-Rings to sizing dies may help some reloaders, but we don’t offer this as a panacea. Try it — if using the O-Ring reduces measured runout that’s great. If it doesn’t, you’ve only spent a few pennies to experiment.
Lee Precision makes die lock rings with built-in O-Rings. Lee’s distinctive lock ring design allows the same kind of self-alignment, which is good. However, Lee lock rings don’t clamp in place on the die threads, so they can move when you insert or remove the dies — and that can throw off your die setting slightly. By using an O-Ring under a conventional die lock ring (that can be locked in place), you get the advantages of the Lee design, without the risk of the lock ring moving.
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Here’s an inexpensive procedure that can help you load straighter ammo, with slightly better measured concentricity (i.e. less run-out) on the case necks and bullets. Simply use a Rubber O-Ring on the underside of the die locking ring. This allows the die to self-align itself (slightly) to the case that is being sized. Without the O-Ring, if the flat surface on the top of your press is not perfectly square with the thread axis, your die can end up slightly off-angle. This happens when the bottom of the locking ring butts up tight against the top of the press. The O-Ring allows the die to float slightly, and that may, in turn, reduce the amount of run-out induced during case sizing.
Top prone shooter GSArizona has tried this trick and he says it works: “Go to your local hardware store and get a #17 O-Ring (that’s the designation at Ace Hardware, don’t know if its universal). Slip the O-Ring on the die and re-adjust the lock ring so that the O-Ring is slightly compressed when the die is at the correct height. Size and measure a few more cases. You will probably see a slight improvement in neck concentricity as the die can now float a bit as the case enters and leaves it. This isn’t going to be a dramatic improvement, but it’s a positive one.”
We want to stress that adding O-Rings to sizing dies may help some reloaders, but we don’t offer this as a panacea. Try it — if using the O-Ring reduces measured runout that’s great. If it doesn’t, you’ve only spent a few pennies to experiment.
Lee Precision makes die lock rings with built-in O-Rings. Lee’s distinctive lock ring design allows the same kind of self-alignment, which is good. However, Lee lock rings don’t clamp in place on the die threads, so they can move when you insert or remove the dies — and that can throw off your die setting slightly. By using an O-Ring under a conventional die lock ring (that can be locked in place), you get the advantages of the Lee design, without the risk of the lock ring moving.
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Here’s an inexpensive procedure that can help you load straighter ammo, with slightly better measured concentricity (i.e. less run-out) on the case necks and bullets. Simply use a rubber O-Ring on the underside of the die locking ring. This allows the die to self-align itself (slightly) to the case that is being sized. Without the O-Ring, if the flat surface on the top of your press is not perfectly square with the thread axis, your die can end up slightly off-angle. This happens when the bottom of the locking ring butts up tight against the top of the press. The O-Ring allows the die to float slightly, and that may, in turn, reduce the amount of run-out induced during case sizing.
Top prone shooter GSArizona has tried this trick and he says it works: “Go to your local hardware store and get a #17 O-Ring (that’s the designation at Ace Hardware, don’t know if its universal). Slip the O-Ring on the die and re-adjust the lock ring so that the O-Ring is slightly compressed when the die is at the correct height. Size and measure a few more cases. You will probably see a slight improvement in neck concentricity as the die can now float a bit as the case enters and leaves it. This isn’t going to be a dramatic improvement, but it’s a positive one.” We want to stress that adding O-Rings to sizing dies may help some reloaders, but we don’t offer this as a panacea. Try it — if using the O-Ring reduces measured runout that’s great. If it doesn’t, you’ve only spent a few pennies to experiment.
Lee Precision makes die lock rings with built-in O-Rings. Lee’s distinctive lock ring design allows the same kind of self-alignment, which is good. However, Lee lock rings don’t clamp in place on the die threads, so they can move when you insert or remove the dies — and that can throw off your die setting slightly. By using an O-Ring under a conventional die lock ring (that can be locked in place), you get the advantages of the Lee design, without the risk of the lock ring moving.
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Sinclair Int’l is now selling a new line of O-ring-equipped aluminum jags made by The Custom Shop (TCS). These unique TCS O-Ring Jags are crafted from aluminum so they won’t react to solvents. The O-rings hold the patch firmly against the bore surface to efficiently clean powder, lead, copper, and plastic fouling. There are shapes and sizes for pistols, rifles and shotguns. Rifle jags come in sizes .22 (J22), .243 (J2436mm), .257 (J25725Cal), .270-6.8mm (J27068mm), .284 (J2847mm), .308 (J30RP), .338 (J338RP), and .50 Cal (J50). The “RP” models do double-duty for large-caliber rifles and pistols.
We haven’t tried these jags yet, but we think the O-rings may be a good idea. As with any aluminum-bodied jag, be sure to keep the jags clean, as hard particles and debris can become embedded in the aluminum surface. You don’t want to drag embedded debris across your delicate rifling. The TCS jags range in price from $9.95 to $10.95.
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Here’s an inexpensive tip that can help you load straighter ammo, with slightly better measured concentricity (i.e. less run-out) on the case necks and bullets. Simply use a rubber O-Ring on the underside of the die locking ring. This allows the die to self-align itself (slightly) to the case that is being sized. Without the O-Ring, if the flat surface on the top of your press is not perfectly square with the thread axis, your die can end up slightly off-angle. This happens when the bottom of the locking ring butts up tight against the top of the press.
Top prone shooter German Salazar has tried this trick and he says it works: “Go to your local hardware store and get a #17 O-Ring (that’s the designation at Ace Hardware, don’t know if its universal). Slip the O-Ring on the die and re-adjust the lock ring so that the O-Ring is slightly compressed when the die is at the correct height. Size and measure a few more cases. You will probably see a slight improvement in neck concentricity as the die can now float a bit as the case enters and leaves it. This isn’t going to be a dramatic improvement, but it’s a positive one.”
Lee Precision makes die lock rings with built-in O-Rings. Lee’s distinctive lock ring design allows the same kind of self-alignment, which is good. However, Lee lock rings don’t clamp in place on the die threads, so they can move when you insert or remove the dies — and that can throw off your die setting. By using an O-Ring under a conventional die lock ring, you get the advantages of the Lee design, without the risk of the lock ring moving.
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Small patches are not very efficient at distributing bore cleaning liquids inside your bore. The problem with a tight-fitting patch is that the solvent gets squeezed off in the first few inches. You can switch to a smaller jag, or a bore mop, but there is an even better way to get an ample amount of solvent in your bore. Just spray directly into the bore with a wash bottle, an inexpensive plastic bottle with an L-shaped dispensing neck, tapered at the end.
When using the wash bottle, you can either just plug the breech and spray from the muzzle end (where most copper fouling is), or, alternately, put the wash bottle neck directly in the chamber and spray forward. When spraying from the chamber forward, you may need to use a rubber O-Ring to seal off the action… depending on the bore size and the particular wash bottle’s neck spout diameter. We prefer to plug the breech and squirt from the muzzle.
Bottle Solvent Application Method Works Great for Smaller Bores
Using wet patches or wet brushes is an inefficient way to really saturate the tight bores of 17s, 20s, and 22s. Even with a cotton bore mop, most of the solvent will be squeezed out before it gets to the end of the bore, where most copper fouling occurs. For these smaller 17, 20, and 22-caliber bores, you can just take the wash bottle and stick the tapered nozzle right in the chamber. The tapered end will press fit in the throat, sealing off the chamber. With the barrel slightly nose-down, give the bottle a couple good squirts until the solvent mists out the muzzle. In just a few seconds, this will put more solvent in the bore than a half-dozen wet patches.
A solvent-filled wash bottle is also handy for wetting your brushes. It’s much easier to saturate a bore brush (without spilling solvent on your stock), by using the wash bottle. You can get wash bottles from USPlastic.com, Amazon.com, or lab supply stores. CLICK HERE for $4.98 wash bottle.
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At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
1. Midsouth — Blem Bullets Sale, 65+ Types Up to 50% Off
⏺ Big savings on rifle bullets .22 to .416 cal, match and hunting
Here’s a great Blem Bullet Sale at Midsouth. Save up to 50% on a wide range of bullets, from .22 Cal varmint projectiles up to massive 400+ grain hunting bullets. Chose among BTHP, Polymer Tip, Aluminum Tip, and even a few unleaded types. You’ll probably find something you’ll like, with huge savings. For example, PRS competitors can get 250 6mm 90gr bullets for just $59.99 — a mere 24 cents each (37% discount). And varminters can get 55gr BTHP bullets for just 13 cents each (price $32.99 for 250).
2. Midsouth — Lyman Gen 6 Powder Dispenser, $219.99
⏺ Save $40 (15%) on popular powder scale/dispenser
Optimal accuracy and low ES/SD demands very precise (and consistent) powder charges. You’ll want a quality powder scale/dispenser such as the Gen 6 Compact Digital Powder Dispenser System. Accurate to 0.10 grain, the Lyman Gen6 dispenses various types of smokeless powder at two grains per second. This machine has an auto repeat function that drops a precise charge each time the pan is reset.
3. Natchez — Primers and Ammunition Sale
⏺ Save on CCI, Fed, & Rem primers plus rimfire and centerfire ammo
The shortage of primers is easing, with prices dropping a bit. If you need primers, check out the current Primer and Ammo Sale at Natchez. A wide range of CCI, Federal, and Remington primers are on sale, with savings of $20-$35 per 1000. In addition there are significant discounts on rimfire and centerfire ammunition. Note: This sale concludes on Tuesday 4/23/24, so don’t delay.
⏺ Effective, compact hearing protection with ability to hear range commands
Protect your hearing and monitor range commands with the Radians Vertex Nano Electronic Earplugs now just $74.95 at Creedmoor Sports. The custom micro-circuitry has 2 mode levels for standard and enhanced amplification with < 0.02 second reaction time to protect against dangerous impulse noises. Dedicated right and left plugs are each powered by ultra-efficient batteries with 120 hours life. This is a great deal! These very same Radian electronic earplugs cost $119.99 elsewhere.
5. MidwayUSA — Vortex Gen I Diamondback Binoculars, $129.99
⏺ Great 10×42 binocs for the money — good choice for varminters
At the range or in the field, a good pair of binoculars is very useful. Right now the 10x42mm Vortex Optics Gen I Diamondback Binoculars are $100 off at MidwayUSA — a 43% savings. These lightweight (24 oz.) binoculars offer a wide field of view and a lifetime VIP Vortex warranty. These rubber-armored binocs are a good choice for hunters and backpackers. The Diamondback series are O-ring sealed and argon-purged for true 100% weatherproofing.
6. Graf’s — Competition Electronics Chron and Timer Sale
⏺ Big savings on chronos and timers
Every serious shooter needs a good chronograph. If you’re in the market for a chrono or timer check out the Competition Electronics sale at Graf & Sons. You can get a reliable Comp. Electronics chronograph for just $120 — hundreds less than a LabRadar or Garmin. And if you compete in timed, speed-based matches, a Comp. Electronics timer will help you train more effectively.
7. Amazon — Case Prep Multitool, $14.99
⏺ Great price on versatile tool with internal storage
Proper brass prep includes chamfering and deburring case-mouths as well as cleaning the primer pockets. For a modest $14.99 price, the TYRWEEY Case Prep Multitool (#ad) can perform all these key tasks. This tool will chamfer, deburr. and clean pockets. A very nice feature is that the tool heads can be stored INSIDE the handle when not in use. The tool has a non-slip, checkered exterior for secure handling.
8. Amazon — Tactical 4-Pistol Range Bag, $39.99
⏺ Good price on well-made, roomy Pistol bag.
The DSLEAF Tactical Gun Range Bag (#ad) is a good, sturdy bag that holds up to 4 full-size handguns. This DSLEAF bag has 3 inner removable dividers, 2 mesh pockets, and 6 mag-holders. It can hold up to 4 pistols as well as earmuffs and shooting eyewear. There are nice zippered pockets on the side and good, thick internal padding. If you’re not a pistol guy, you can also use this bag to haul your chronograph, target cam, and other accessories.
9. Amazon — Target Stand Dual Pack, $49.97
⏺ Good price on pair of adjustable target stand
The Knine Outdoor Shooting Target Stand kit (#ad) allows you to set up your own elevated target in any shooting area. This kit includes 2 metal target stands, 8 ground stakes, 8 butterfly screws, plus paper clips. The base units adjust for width from 13″ to 24″ horizontal spread. This kit includes ten printed 16″x12″ shooting paper targets. NOTE, you must supply your own wood risers and cardboard target backers.
10. Amazon — 6-Pack Stackable AkroBins, $15.00
⏺ Good option for tool and reloading components stackable storage
Parts, brass, and bullets all need to be kept safe on the bench when you’re reloading. Akro-Mils AkroBins (#ad) are a quality option that can be placed on wall racks, shelving, or on a benchtop. These can be stacked securely. These AkroBins are sold in packs of six for $15.00, and are available in four colors: red, yellow, blue, and white. Dimensions are 4-1/8″ Wide x 5-3/8″ Deep x 3″ High.
As an Amazon affiliate, this site can earn revenues through sales commissions.
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Most modern match rifle barrels are stainless steel alloy. These are from Benchmark Barrels.
Though some grades of stainless are more corrosion-resistant, ALL varieties of stainless steel can rust if they are not handled and stored properly.
Some folks feel that they don’t have to worry about rust and corrosion on stainless steel barrels, actions, and other components. That’s not really true. “Stainless” is a bit of a misnomer. First, there are different types of stainless steel alloys, with different degrees of rust resistance. 300 series stainless is more corrosion resistant than the 416 stainless commonly used in barrels. The composition (by percentage weight) of 416 stainless is 0.15% carbon, 12-14% chromium and the rest iron. 416 stainless steel lacks the roughly 10% nickel content that makes the 300 series more corrosion resistant in atmospheric conditions. But because 416 handles pressure better and is easier to machine (than 300 series steel), 416 stainless remains the better choice for barrels.
Though some grades of stainless are more corrosion-resistant, ALL varieties of stainless steel can rust if they are not handled and stored properly. Forum reader Kells81 observed: “Wanna see some rusted stainless? Go to the big “C” brand store in Ft. Worth. Every stainless gun they have on the used gun rack is rusted.” Tom Easly of TRE Custom explains: “Sweat is very corrosive. Sweat and blood will rust many stainless steels. I hate to handle my guns or drip on them when I sweat. It really helps to just wipe them good with a wet rag, dry and wipe on a light coating of gun oil. I think most stainless barrels are made from type 416 stainless, and it is generally pretty corrosion resistant, but not when exposed to sweat, blood, or chlorates (corrosive priming), and some other electrolytes.”
Forum member Jacob, who is studying materials science at LSU, provides this technical information: “The basic resistance of stainless steel occurs because of its ability to form a protective coating on the metal surface. This coating is a ‘passive’ film which resists further ‘oxidation’ or rusting. The formation of this film is instantaneous in an oxidizing atmosphere such as air, water, or other fluids that contain oxygen. Once the layer has formed, we say that the metal has become ‘passivated’ and the oxidation or ‘rusting’ rate will slow down to less than 0.002″ per year (0.05 mm per year).
Unlike aluminum or silver, this passive film is invisible in stainless steel. It’s created when oxygen combines with the chrome in the stainless to form chrome oxide which is more commonly called ‘ceramic’. This protective oxide or ceramic coating is common to most corrosion resistant materials.
Halogen salts, especially chlorides, easily penetrate this passive film and will allow corrosive attack to occur. The halogens are easy to recognize because they end in the letters ‘ine’. Listed in order of their activity they are: fluorine, chlorine, bromine, iodine, astatine.
These are the same chemicals that will penetrate Teflon and cause trouble with Teflon coated or encapsulated O-rings and/ or similar coated materials. Chlorides are one of the most common elements in nature and if that isn’t bad enough, they’re also soluble, active ions. These provide the basis for electrolytes. The presence of electrolytic solutions can accelerate corrosion or chemical attack.”
CONCLUSION: Stainless steel barrels and components won’t rust nearly as fast as blued steel, but you still have to take precautions — particularly removing sweat and corrosive salts from the barrel. Also, don’t let moisture build up inside or outside of the barrel. We recommend wiping your barrels and actions with Eezox, or Corrosion-X after each use. These are both extremely effective rust-fighters that go on thin, without leaving a greasy residue. (Eezox leaves a clear finish, while Corrosion-X has a slightly waxy finish.) Also store your guns in Bore-Store bags when the guns go in the safe. Bore-Stores wick away moisture, and the synthetic fleece inner surface is treated with rust-fighting chemicals. Bore-Stores also protect your guns against dings and scratches.
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Our friend Gavin Gear of UltimateReloader.com often gets to test the latest and greatest reloading tools before they hit the market. He does a good job showing the features of new products with informative videos. Today we present three interesting products that Gavin has reviewed. First off is the impressive new RCBS Rebel reloading press. Next is the versatile three-head Case Prep Trio machine from Hornady. Third, Gavin reviews new Die Lock Rings and Breech Lock Die Bushings from Lee Precision.
RCBS Rebel Single-Stage Reloading Press
Most hand-loaders have used an RCBS Rock Chucker press at one time or another. Recently RCBS unveiled its new Rebel single-stage press. Like the Rock Chucker, the Rebel has a Cast Iron frame, but with a bigger base and taller arch (for a larger opening). The most important change is that this new Rebel press ejects primers out the bottom of the ram. This a big deal — just put a bin under the press to collect spent primers. However — take note — the Rebel has no on-press priming. You need to prime your cases separately. That’s not really a major issue, as we know the majority of our readers prime separately using hand or bench priming tools.
In this video Gavin loads ammo on the new the Rebel single-stage press and explains its notable features, including the primer ejection through the ram.
Currently Midsouth Shooters Supply is running a major RCBS Products Sale, with significant savings. The RCBS Rebel Press is now on sale for $219.99 at Midsouth, $30 off the regular price — a good deal for a press that can last a lifetime.
Hornady Lock-N-Load Case Prep Trio
Hornady’s compact Case Prep Trio machine (item 050160) packs a lot of functionality in a small package. This triple-threat tool has a small footprint, yet it can perform three tasks as well as much more expensive, tower-style case prep units.
Gavin Gear does a nice job explaining the features of the Case Prep trio. Watch this video to see how it can help you perform chamfering, deburring, and pimer pocket uniforming tasks more efficiently.
With three active stations, you can chamfer, deburr and clean primer pockets without having to change tools. The Case Prep Trio ships with inside chamfer, outside chamfer, and deburr tools. You can also use the machine with other optional 8/32 threaded accessories such as primer pocket reamers and case neck brushes. We’ve used this machine and it works well. The only negative is that you will get metal shavings on your bench (unlike some of the larger case prep centers). We’ve seen some guys put a small pan under the power head — then you can just dump the shavings out of the pan.
Lee Die Lock Rings and Spline Drive Breech Lock Bushings
New basic lock ring in left hand. Older non-splined ring in right hand.
In this video Gavin Gear reviews three types of die accessories from LEE. These work for virtually all standard dies, not just LEE-brand reloading dies. The new LEE basic silver-finish die lock rings now feature splines for enhanced grip and compatibility with LEE’s new die lock ring wrench (photo right). They still boast a rubber 0-Ring that helps “float” the die for improved cartridge concentricity.
LEE’s latest Ultimate Die Lock Rings have two major improvements — a colorful anodized finish, and a split-ring design with a tensioning screw, that allows these rings to be clamped securely to your dies. Available as a set, this package includes three ultimate die lock rings, and a plastic die lock ring wrench.
Gavin also reviews Lee’s Spline Drive Breech Lock Bushings for use with presses fitted with LEE’s Breech Lock system. These new Breech Lock bushings allow rapid change-out of dies without modifying the setting. The colorful new bushings feature splines on top that work with the new Lee Lock ring wrench shown above. In addition, the Breech Lock Bushings have a clamp to preserve die depth setting.
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The U.S. Army Marksmanship Unit published a series of reloading “how-to” articles on the USAMU Facebook page. A while back the USAMU’s reloading gurus looked at the subject of cartridge run-out and what can be done to produce straighter ammo. Tasked with producing thousands of rounds of ammo for team members, the USAMU’s reloading staff has developed smart methods for improving concentricity, even with budget-priced dies. For other hand-loading tips, visit the USAMU Facebook page.
Minimizing Runout with Standard Seating Dies
This USAMU article explains how to set up standard bullet seating dies dies to minimize Total Indicated Run-out (TIR). The loading process is described using a single-stage press since most handloaders have one. A high-quality run-out gauge is essential for obtaining consistent, accurate results.
Having sized, primed, and charged our brass, the next step is bullet seating. Many approaches are possible; one that works well follows. When setting up a standard seating die, insert a sized, trimmed case into the shellholder and fully raise the press ram. Next, back the seating stem out and screw the die down until the internal crimping shoulder touches the case mouth.
Back the die out ¼ turn from this setting to prevent cartridge crimping. Next, lower the press ram and remove the case. Place a piece of flat steel (or window glass, which is quite flat) on the shellholder and carefully raise the ram.
Place tension on the die bottom with the flat steel on the shellholder. This helps center the die in the press threads. Check this by gently moving the die until it is well-centered. Keeping light tension on the die via the press ram, secure the die lock ring. If one were using a match style, micrometer-type seating die, the next step would be simple: run a charged case with bullet on top into the die and screw the seating stem down to obtain correct cartridge OAL.
However, with standard dies, an additional step can be helpful. When the die has a loosely-threaded seating stem, set the correct seating depth but don’t tighten the stem’s lock nut. Leave a loaded cartridge fully raised into the die to center the seating stem in the die. Then, secure the stem’s lock nut. Next, load sample cartridges and check them to verify good concentricity.
One can also experiment with variations such as letting the seating stem float slightly in the die to self-center, while keeping correct OAL. The run-out gauge will show any effects of changes upon concentricity. However, this method has produced excellent, practical results as evidenced by the experiment cited previously. These results (TIR Study 2) will reproduced below for the reader’s convenience.
First, however, let’s examine run-out figures of some factory-loaded match ammunition. This should give readers who are new to TIR gauges some perspective about the TIR ranges one might encounter.
TIR Study 1: 50 rounds Lake City M852 Match 7.62mm
(168 gr. Sierra MatchKings)
0.000” – 0.001” = 2%
0.001” – 0.002” = 30%
0.002” – 0.003” = 16%
0.003” – 0.004” = 22%
0.004” – 0.005” = 14%
0.005” – 0.006” = 14%
0.006” – 0.007” = 0%
0.007” – 0.008” = 2%
TIR Study 2: 50 rounds of .308 match ammo loaded using carefully-adjusted standard dies, vs. 50 using expensive “Match” dies from the same maker.
Standard dies, TIR:
0.000” — 0.001” = 52%;
0.001”– 0.002” = 40%;
0.002”– 0.003” = 8%.
None greater than 0.003”.
Note: both samples were loaded using the O-Ring method, i.e. with a rubber O-Ring placed under the locking ring of the Full-length sizing die to allow that die to float.
These tips are intended to help shooters obtain the best results from inexpensive, standard loading dies. Especially when using cases previously fired in a concentric chamber, as was done above, top-quality match dies and brass can easily yield ammo with virtually *no* runout, given careful handloading.
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Before you load that nice new cartridge brass for the first time, run an expander mandrel down the case necks. This will iron out dents and provide more uniform neck tension. Chose a mandrel diameter that provides appropriate neck tension.
Lapua brass is so good that you’ll be tempted to just load and shoot, if you have a “no-turn” chamber. However, some minimal case prep will ensure more uniform neck tension. Keeping your neck tension very uniform allows more consistent bullet seating. That, in turn, usually yields better accuracy, and lower Extreme Spread and Standard Deviation (ES/SD). Lapua brass, particularly 6mmBR, 6.5×47, 6.5 Creedmoor, and .308 Win comes from the factory with tighter-than-optimal necks. Before you seat bullets, at a minimum, you should inside chamfer the case mouths, after running an expander mandrel down the necks. The expander mandrels from both Sinclair Int’l and K&M will both leave the necks with enough neck tension (more than .001″) so you can then seat bullets without another operation. We suggest putting a bit of lube on the mandrel before running it down the necks — but remove any lube that gets inside the necks before seating bullets.
Both Sinclair and K&M Tools make a die body specifically to hold expander mandrels. The Sinclair version, is shown above. This $32.99 unit fits caliber-specific expander mandrels ($9.99) which measure approximately .001″ less than bullet diameter for each caliber. This is an updated “Gen II” design that completely captures the mandrel within the die so the mandrel cannot pull out. It also has an O-ring in the die cap that allows the mandrel to self-center within the case neck. Sinclair now offers three sizes of die bodies for expander mandrels: .17 -.338 Caliber (#749-011-715WS $32.99); .357 – .50 caliber (#749-008-843WS, $32.99), and a special .50 Cal die body for large-diameter 50 BMG presses (#749-009-163WS, $39.99). All Generation II dies are machined from stainless steel and the standard diameter 7/8-14 dies include the Sinclair Stainless Steel Split Lock Ring.
Once you run the Sinclair expander mandrel down the necks of Lapua brass, after you account for brass spring-back, you’ll have about .002″ neck tension*. This will make the process of seating bullets go much more smoothly, and you will also iron out any dents in the case mouths. Once the case mouths are all expanded, and uniformly round, then do your inside neck chamfering/deburring. The same expander mandrels can be used to “neck-up” smaller diameter brass, or prepare brass for neck-turning.
Forum member Mike Crawford adds: “These expanders can also reduce runout from offset seating. Prior to bullet seating, expand the sized necks to force thickness variance outward. With the Sinclair system, the necks will springback fine, and will not be pulled out of center. This leaves plenty of tension, and bullets seated more centered. I do this, even with turned necks, to get improved seating.”
Mandrels vs. Expander Balls on Decapping Rods
If you haven’t acquired an appropriate expander mandrel for your brass, but you DO have a full-length sizing die with an expander ball, this will also function to “iron out” the necks and reduce tension. However, using a die with an expander ball will work the necks more — since you first size them down, then the ball expands them up again. Typically (but not always), run-out is worse when using an expander ball vs. an expander mandrel.
* This .002″ tension is what we have observed with Lapua 6mmBR, 6.5×47, 6.5 Creedmoor, and .308 Win brass. This might vary with much smaller or larger cases, and of course a different brand of brass might yield different results. If you get too little tension with your current mandrel, you can get a smaller-diameter mandrel from 21st Century Shooting. 21st Century even offers low-friction Titanium Nitride-coated mandrels.
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At the request of our readers, we provide select “Deals of the Week”. Every Sunday afternoon or Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
NOTE: All listed products are for sale to persons 18 years of age or older. No products are intended for use by minors.
This week we mark a special milestone of bargains and discounts. To celebrate the first day of 2024, we are boosting the number of deals listed, for a total of TWENTY-FOUR great deals for 2024!
The Frankford Arsenal Intellidropper powder scale/dispenser has earned positive owner reviews. This unit is FAST, and you can program your loads with a smart-phone App. Get it now for $179.99 at Midsouth, a great deal.
Everyone needs a borescope to check barrel fouling. Teslong makes very good borescopes. Get the Basic Model for $55.99 or get the Rigid Model for $99.99 with a metal shaft. Both work well.
Here’s a nice .22 LR bolt-action rifle for just $399.99 on sale. This Springfield Armory 2020 rifles comes complete with installed Viridian EON 3-9x40mm scope.
This dual-mode rifle case for hunters and tactical shooters boasts comfortable shoulder straps, plus large external pockets. This case is offered in green or black in 36″, 42″, and 51″ sizes. The 36″ model starts at $55.95 on Amazon.
Here’s a nice Taurus 9mm pistol with threaded muzzle for $299.99 at Brownells or just $269.99 with $30 Taurus Factory Rebate.
These compact ZEISS TL 10x25mm binoculars are now just $199.99 on sale at MidwayUSA. That’s $200 off the MSRP — an amazing bargain for very high quality binoculars.
Protect your ears while hearing those around you with these Walker Electronic Muffs with Walkie Talkie. These slim muffs include a Walkie-Talkie attachment and have a 23db NRR rating. These sell for over $110 elsewhere.
Here’s a killer deal on rimfire plinking ammo. You get 2000 rounds of Aguila Super Extra .22 HiVel 40gr ammo for just $114.99! That works out to just $2.88 per 50rd box or less than $0.06 per round. Plus you get FREE Shipping on 1/1/2024.
The Hornady RFID Vehicle Safe offers rapid handgun access without a conventional key or keyboard entry. Right now this Hornady RFID vehicle safe is just $89.00, a 60% savings off the normal $224.99 price.
Varget powder is a great choice for .223 Rem, 6BR, 6mm Creedmoor, .308 Win. But it has been very hard to find. Graf’s has Varget in stock $50.99 per pound. Grab some now.
Simple targets are hard to beat at the range. We love these Champion Sight-In Targets for only $3. Grab a bunch and go have some fun.
The Frankford Arsenal F-1 single-stage press has great reviews from buyers. The open front offers excellent access for cartridges and operation is smooth. Get this on sale for $128.99 at Midsouth.
Walker’s Electronic Earplugs with BlueTooth are now just $149.99, a $100 savings. These plugs provide good NRR 24 dB hearing protection while allowing you to hear range commands.
With this Frankford Universal Seating Die you can load NINE different bullet diameters: .224, .243, .257, .264, .277, .284, .308, .325, .338. Now $76.99 at Midsouth this kit includes micrometer stem, 9 bullet alignment sleeves, 3 VLD bullet seating stems, and molded storage case.
Anyone with a gunsafe can benefit from this handy Lockdown Safe Accessory Pack. For just $9.99 (80% off), you get a Vault Light, Large Organizer, and Document holder for passports and ID cards.
Here’s a great set-up for storing loaded ammunition and brass. The handy MTM 4-unit Ammo Crate comes with four stackable, O-ring sealed 30-Cal ammo containers. These will protect your ammo from moisture. The full crate measures measures 23.5″ L x 11.3″ W x 7.5″ H.
You should cover your long guns in your safe to prevent rust and avoid dings/scratches. Right now for $23.99 on Amazon, you can get a multi-color set of four GMW 52″x4″ gun socks with silicone-treated fabric. Or get four gray socks for $24.99.
This is a great deal — Get a 9mm Smith & Wesson SD9VE pistol with built-in Crimson Trace Laser and extra night sights for just $299.99.
These 10-power Vortex Diamondback Binoculars are rubber-armored and 100% weatherproof with O-Ring seals. Get these for just $129.99, a $100 savings off the regular $229.99 price.
The Burris Eliminator IV is a 4-16x50mm optic with a built-in Laser Rangefinder. This is great option for varmint hunters. This rangefinding scope is on sale for $1099.99 at MidwayUSA, a 37% savings.
You have the equipment but do you have the skills to shoot in the wind? Grab The Wind Book and you’ll get tips and tricks from wind experts so you can dominate your next match.
This Gloryfire Elite Gun Cleaning Kit features brushes and brass jags for all popular calibers. It includes cleaning rod sections, patches, bore mops, pull cords, and even a chamber flag. This $69.99 kit has 79% 5-star ratings.
Get high-quality, American-made Federal 9x19mm brass-cased FMJ pistol ammo at a great price — just $14.99 for 50 rounds at Midsouth.
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Small patches are not very efficient at distributing bore cleaning liquids inside your bore. The problem with a tight-fitting patch is that the solvent gets squeezed off in the first few inches. You can switch to a smaller jag, or a bore mop, but there is an even better way to get an ample amount of solvent in your bore. Just spray directly into the bore with a 
CONCLUSION: Stainless steel barrels and components won’t rust nearly as fast as blued steel, but you still have to take precautions — particularly removing sweat and corrosive salts from the barrel. Also, don’t let moisture build up inside or outside of the barrel. We recommend wiping your barrels and actions with Eezox, or Corrosion-X after each use. These are both extremely effective rust-fighters that go on thin, without leaving a greasy residue. (Eezox leaves a clear finish, while Corrosion-X has a slightly waxy finish.) Also store your guns in 
In this video Gavin Gear reviews three types of die accessories from LEE. These work for virtually all standard dies, not just LEE-brand reloading dies. The new LEE basic silver-finish die lock rings now feature splines for enhanced grip and compatibility with LEE’s new die lock ring wrench (photo right). They still boast a rubber 0-Ring that helps “float” the die for improved cartridge concentricity.
