Many novice hand-loaders believe that neck bushing Inside Diameter (ID) size is the only important factor in neck tension. In fact, many different things will influence the grip on your bullet and its ability to release from the case neck. To learn the ins and outs of neck tension, take some time and read this article carefully.
Neck Tension (i.e. Grip on Bullets) Is a Complex Phenomenon
While we certainly have considerable control over neck tension by using tighter or looser bushings (with smaller or bigger Inside Diameters), bushing size is only one factor at work. It’s important to understand the multiple factors that can increase or decrease the resistance to bullet release. Think in terms of overall brass-on-bullet “grip” instead of just bushing size (or the internal neck diameter in non-bushing FL dies).
Bullet grip is affected by many things, such as:
1. Neck-wall thickness.
2. Amount of bullet bearing surface (shank) in the neck.
3. Surface condition inside of neck (residual carbon can act as a lubricant; ultrasonic cleaning makes necks “grabby”).
4. Length of neck (e.g. 6mmBR neck vs. 6mm Dasher).
5. Whether or not the bullets have an anti-friction coating.
6.The springiness of the brass (which is related to degree of work-hardening; number of firings etc.)
7. The bullet jacket material.
8. The outside diameter of the bullet and whether it has a pressure ridge.
9. Time duration between bullet seating and firing (necks can stiffen with time).
10. How often the brass is annealed.
11. Amount (length) of neck sized (e.g. you can size only half the neck).
12. Interior diameter of bushing, or neck section of non-bushing die.
— and there are others…
One needs to understand that bushing size isn’t the beginning and end of neck tension questions, because, even if bushing size is held constant, the amount of bullet “grip” can change dramatically as the condition of your brass changes. Bullet “grip” can also change if you alter your seating depth, and it can even change if you ultrasonically clean your cases.
In our Shooters’ Forum a reader recently asked: “How much neck tension should I use?” This prompted a Forum discussion in which other Forum members recommended a specific number based on their experience, such as .001″, .002″, or .003″. These numbers, as commonly used, correspond to the difference between case-neck OD after sizing and the neck OD of a loaded round, with bullet in place. In other words, the numbers refer to the nominal amount of interference fit (after sizing).
While these commonly-used “tension numbers” (of .001″, .002″ etc.) can be useful as starting points, neck tension is actually a fairly complex subject. The actual amount of “grip” on the bullet is a function of many factors, of which neck-OD reduction during sizing is just one. Understanding these many factors will help you maintain consistent neck tension as your brass “evolves” over the course of multiple reloadings.
Seating Depth Changes Can Increase or Decrease Grip on Bullet
You can do this simple experiment. Seat a boat-tail bullet in your sized neck with .150″ of bearing surface (shank) in the neck. Now remove the bullet with an impact hammer. Next, take another identical bullet and seat it with .300″ of bearing surface in another sized case (same bushing size/same nominal tension). You’ll find the deeper-seated bullet is gripped much harder.
Neck-Wall Thickness is Important Too
I have also found that thinner necks, particularly the very thin necks used by many PPC shooters, require more sizing to give equivalent “grip”. Again, do your own experiment. Seat a bullet in a case turned to .008″ neckwall thickness and sized down .003″. Now compare that to a case with .014″ neckwall thickness and sized down .0015″. You may find that the bullet in the thin necks actually pulls out easier, though it supposedly has more “neck tension”, if one were to consider bushing size alone.
In practical terms, because thick necks are less elastic than very thin necks, when you turn necks you may need to run tighter bushings to maintain the same amount of actual grip on the bullets (as compared to no-turn brass). Consequently, I suspect the guys using .0015″ “tension” on no-turn brass may be a lot closer to the guys using .003″ “tension” on turned necks than either group may realize.
Toward a Better Definition of Neck Tension
As a convenient short-cut, we tend to describe neck tension by bushing size alone. When a guy says, “I run .002 neck tension”, that normally means he is using a die/bushing that sizes the necks .002″ smaller than a loaded round. Well we know something about his post-sizing neck OD, but do we really have a reliable idea about how much force is required to release his bullets? Maybe not… This use of the term “neck tension” when we are really only describing the amount of neck diameter reduction with a die/bushing is really kind of incomplete.
My point here is that it is overly simplistic to ask, “should I load with .001 tension or .003?” In reality, an .001″ reduction (after springback) on a thick neck might provide MORE “grip” on a deep-seated bullet than an .003″ reduction on a very thin-walled neck holding a bullet with minimal bearing surface in the neck. Bushing ID is something we can easily measure and verify. We use bushing size as a descriptor of neck tension because it is convenient and because the other important factors are hard to quantify. But those factors shouldn’t be ignored if you want to maintain consistent neck tension for optimal accuracy.
Consistency and accuracy — that’s really what this all about isn’t it? We want to find the best neck tension for accuracy, and then maintain that amount of grip-on-bullet over time. To do that you need to look not only at your bushing size, but also at how your brass has changed (work-hardened) with time, and whether other variables (such as the amount of carbon in the neck) have changed. Ultimately, optimal neck tension must be ascertained experimentally. You have to go out and test empirically to see what works, in YOUR rifle, with YOUR bullets and YOUR brass. And you may have to change the nominal tension setting (i.e. bushing size) as your brass work-hardens or IF YOU CHANGE SEATING DEPTHS.
Remember that bushing size alone does not tell us all we need to know about the neck’s true “holding power” on a bullet, or the energy required for bullet release. True bullet grip is a more complicated phenomenon, one that is affected by numerous factors, some of which are very hard to quantify.
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Check out those five targets. The Aggregate (average) of all five targets is a tiny 0.0840 inches! These were shot by Gary Ocock at 100 yards in a California benchrest match on August 6, 2017. Though Gary’s 0.0840 Agg beats existing records, this was not a “sanctioned” match, so Gary’s killer Agg will NOT be submitted for IBS or NBRSA records. So, sadly, the Agg won’t appear in the record books, but this remains a spectacular, verified feat of rifle accuracy, accomplished in competition.
The argument can be made that this is the Most Accurate Gun Ever Built. As far as we can determine, no one has ever shot a smaller 5-target Agg anywhere, at any time.
The Unlimited Benchrest Record That Will Never Be (Official)
Report by Boyd Allen
Gary Ocock’s stunning unlimited Aggregate is beyond amazing. That’s an average of five, 5-shot groups of .0840. Shot under sanctioned match rules, but at an unsanctioned 100-yard fun match, this Aggregate is well under the current 100-yard official records of the IBS (.1386), and the NBRSA (.1242). The fourth of the five groups measured a minuscule .018, less than half the size of the existing NBRSA Unlimited record of .049 (also shot by Gary). Check it out:
When the top 15 shooters all post teen Aggs, conditions must be pretty favorable. However there were some light switchy winds — Gary said that he shot better in the left to right condition.
GUN SPECIFICATIONS
Ocock’s red Jay Young Unlimited Railgun features one major difference from Young’s typical Railgun designs. The bottom of the barrel block is integral with the top (moving part), of the gun. The barrel is Ocock’s usual 1:13.5″-twist Krieger chambered for the 6 PPC. The BAT Neuvo action* is unusual in that its lugs are horizontal at lock-up instead of the usual vertical. With horizontal lugs, both lugs maintain contact with their abutments when the action is cocked. In the more normal configuration when cocked the top lug is forced off of its seat by a combination of the angle of the trigger cocking piece interface, the pressure of the striker spring, and bolt clearance at the rear of the action.
LOAD SPECIFICATIONS
Gary shot this remarkable Agg with well-used brass, Vihtavuori N133 powder, and self-made 66gr BT bullets** seated at “jam”. This amazing Agg was shot on the second day of a 2-day Unlimited Benchrest match. On Day 1 Gary had experimented with various loads using both surplus IMR 8208 and Vihtavuori N133, but was not satisfied with the results. For his first group on Day 2, Gary tried a light load of N133. After seeing the result, however, he decided to go to the other extreme — a super stout N133 load — with the same powder. As you can see, Gary’s willingness to experiment paid off.
Notably, Gary used light neck tension. Ocock found that for these bullets and this barrel, light neck tension worked best (contrary to “normal” N133 benchrest practice). Ocock used a bushing that only produces .001″ difference between the diameters of sized and loaded case necks.
Comment on Ocock’s Achievement
Congratulations to Gary Ocock for superb shooting (and smart loading). Even though the match was not sanctioned (so the Agg will never be a record), Ocock has raised the bar very high, and given us a new standard of ultimate accuracy.
Though this 0.0840 Aggregate and 0.018 group will never go into the record group, they are still noteworthy. There’s virtually no doubt that they would have survived inspection by any record committee. Except for the lack of fixed backers, an IBS requirement (for detecting cross-fires), all other conditions were met for an officially-sanctioned match.
*The new BAT Neuvo actions are the result of a collaboration between Dwight Scott, and Bruce Thom, featuring Dwight’s ideas and BAT’s proven manufacturing expertise.
** Ocock shot his own, boat-tail match bullets, made with George Ulrich-crafted dies using Hood cores. Although he said that it had been a while since he had weighed any, his best guess was that they weigh something around 66.5 grains.
What you see above is what happens when you shoot the wrong powder in a muzzle-loader. Specifically, a charge of smokeless powder was used instead of black powder or black powder substitute. The difference in energy (by weight and volume) between black powder and modern smokeless powder is huge. You should never, ever run smokeless powder in a black powder recipe. The result can be catastrophic. In this case the hapless shooter lost a couple fingers. So he got a free twin-digit amputation, thanks to his reloading mistake. The lesson to learn here is to always double-check your propellant before loading. And never “re-bottle” smokeless powder into a different container with a different label (or worse yet, no label at all).
This incident happened in Indiana a couple years back. As reported by the Indiana Dept. of Natural Resources (DNR), this was a classic case of “user error”: “Corporal Eric Doane worked a firearm accident last night in Martin County that resulted in the shooter losing a couple fingers. This is what can happen when you shoot smokeless powder out of a muzzle-loader designed for black powder.”
Many thousands of hand-loaders, including this Editor, acquired the original RCBS ChargeMaster 1500 powder scale/dispenser. Mine has worked well for many years. Yes I do have to watch for scale drift, and I use a high-end Force-Restoration scale when loading for major matches, but the original ChargeMaster has served me well, throwing thousands of charges over the years.
NEW RCBS ChargeMaster Lite
Now there is a newer version of the ChargeMaster, the RCBS Chargemaster Lite. This new-for-2017, one-piece unit has some features we really like. The new touch screen is easy to use and the powder tray cover slips off easily — no more hinges to fight. Most importantly the CM Lite has a redesigned, fluted dispensing tube which delivers powder kernels in a smooth flow with no clumps. The RCBS Rep told us “No more McDonald’s straw required”. We tested the unit and it does seem like the newly-designed dispensing tube is better. In fact, this new design will be adapted to the next generation of larger ChargeMasters. The ChargeMaster Lite ships complete with calibration check weights and cleaning brush. MSRP is $299.95 with “street price” around $250.00 at Amazon.
If you’re interested in the RCBS ChargeMaster Lite, here are three recent video product reviews. By watching these videos you can see all the features of the ChargeMaster Lite demonstrated. In the third video, the host also “compares and contrasts” the ChargeMaster Lite with the original ChargeMaster 1500, explaining the differences between the two units. Have at it:
Panhandle Precision ChargeMaster Lite Bench Test and Demo (Good Detailed Review):
Here is the RCBS Press Release: “The new RCBS ChargeMaster Lite packs unparalleled powder-measuring accuracy in a compact package. The one-piece unit features an LCD touchscreen display that ensures accurate data input. The hopper holds nearly a pound of smokeless powder, and can dispense anywhere between 2 to 300 grains with a +/-0.1-grain accuracy.”
If you’re looking for loaded ammunition at affordable prices, WikiArms.com can help you find a good deal. WikiArms constantly searches the listings of ammo vendors across the web. Then WikiArms ranks the offerings by cost per round, low to high. This way you can instantly compare prices from multiple vendors including Ammomen, Ammunition Depot, Brownells, Cheaper Than Dirt, Lucky Gunner, Natchez, Slickguns, SG Ammo, Sportsmans Guide, and Walmart. Search bots refresh pricing constantly so listed prices are normally current within five minutes. WikiArms even displays the amount of product currently in stock for each vendor.
Using WikiArms is easy. Just click your choice of caliber (such as .22 LR, 9mm, or .308 Win) on the navigation bar, or hit the Good Deals link (bottom left column) to see a variety of cartridge types all at one time. WikiArms is fast, and it is FREE to use. Check it out.
WikiArms also tracks prices on reloading components — bullets, brass, primers, and powders. From the WikiArms Home page, look at the left column under the “Reloading” header. From there you can select the type of components you want.
There are some great deals now on quality .223 Rem ammo. Brownells is selling 800 rounds of Norma .223 Rem for $218.70 shipped with code “JNS”. That’s just $0.27 per round for very good stuff.
At the request of our readers, we provide select “Deals of the Week”. Every 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.
1. CDNN — Savage Model 11/111 with Scope $349.99 after Rebate
Looking for a good basic hunting rifle, complete with optic? This Savage Special is hard to beat. Right now you can buy a Savage Hunter XP Model 11 (short action) or Model 111 (long action) for just $449.99 complete with 3-9x40mm Bushnell scope. But it gets even better — Savage Arms is offering a $100.00 Mail-In Rebate that lowers your net cost to a mere $349.99. That’s right — get Savage hunting rig, complete with scope, in your choice of 15 chamberings, for just $349.99.
Available Model 11 chamberings: .243 Win, 6.5 Creedmoor, .260 Rem, 7mm-08, .270 WSM, .308 Win, .300 WSM, .338 Federal
Available Model 111 chamberings: .25-06, 6.5-284 Norma, .270 Win, 7mm Rem Mag, .30-06, .300 Win Mag, .338 Win Mag
2. Grafs.com — Hornady Auto Charge, $179.99 + Free Range Bag
Here’s an excellent promo from our friends at Grafs.com. Hornady’s versatile Lock-N-Load Auto Charge™ Powder Scale and Dispenser is on sale for $179.99. And now for a limited time you get a FREE deluxe range bag ($43.99 value) with the purchase of the Hornady Scale/Dispenser. This is a good unit with a nice keypad. NOTE: You can also get the FREE Range Bag when you buy the Hornady Case Prep Center at Grafs.com for $419.99. That’s pretty pricey — getting Scale/Dispenser with the Range Bag is the better deal.
3. Natchez — Rock Chucker Supreme Reloading Kit, $249.99
Everything you see above can be yours for just $249.99, a great deal. Right now, Natchez is selling the Rock Chucker Supreme Master Reloading Kit for $249.99. That’s a great deal considering all the hardware you get. Heck, the Rock Chucker press alone is worth $150.00+. Considering all you get, this is a heck of a deal. The Natchez price is $70-$90 cheaper than many other vendors. For example, MidwayUSA’s price is $329.99 for this same kit!
4. MidwayUSA — 1500 Rounds Norma Tac-22 Ammo, $136.99
Check out those groups. That’s impressive accuracy at 50 yards. You’d expect to pay $10.00 or more per box for rimfire ammo that can shoot this well. But you can now get the Norma Tac-22 for just $4.56 per box at MidwayUSA in this package deal — 1500 rounds in Ammo Can for $136.99. This works out to just nine cents a round for good .22 LR rimfire ammo which has proved quite accurate in both bolt-action and semi-auto rimfire rifles. NOTE: The target photos come from Champion Shooters Supply, which may have gotten an exceptional lot. This vendor tells us: “We have found this to run very well in Ruger rifles, handguns, and target pistols. These are 5-shot groups at 50 yards with an Anschutz 1913 rifle. This is an incredible value.”
5. Bruno’s Everything Sale — Ends Monday, August 7 at 11:59 PM
Bullets, brass, powder, optics, dies, tools, stocks, barrels, actions — all this and more is on sale at Bruno Shooters Supply right now. You’ll find savings on pretty much everything Bruno’s sells (except MAP-price items). But you have to act quickly. This storewide sale ends TODAY, August 7th at 11:59 PM. You snooze, you loose. NOTE: You don’t need a special discount code — the sale prices are already shown online, good for today (8/7/2017) only.
6. EuroOptic.com — Huge Savings on All Sightron Scopes
EuroOptic is moving to a larger facility. To ease the transition, EuroOptic needs to reduce its large Sightron Optics inventory. Accordingly, Sightrons are marked down with very large price reductions. Our source at EuroOptic says: “All IN STOCK Sightrons are reduced to liquidate — these are going fast at these prices.” There are some great deals here for folks looking for medium-magnification tactical and hunting scopes. Along with riflescopes, Sightron spotting scopes are also on sale.
7. CDNN — Browning Stainless Buck Mark, $279.99 After Rebate
Everyone needs a good .22 LR rimfire handgun, and the Browning Buck Mark is a classic. This stainless, bull barrel version is marked down this week to $329.99. That’s a very good deal, but you can save even more with Browning’s $50 Rebate. Buck Marks, with their excellent triggers and great ergonomics, are fun to shoot and VERY accurate. This is a pistol you can keep for a life-time. Browning says: “Every Buck Mark starts out as a solid piece of aircraft-grade 7075 aluminum alloy, and then is CNC-machined to exacting tolerances. The crisp single-action trigger, hand reamed chamber, target crowned barrel and finely adjustable target sights mean the Buck Mark comes ready for fun straight from the box.” There is also a blued Buck Mark version priced at $289.99 (or $239.99 after Rebate).
8. Midsouth — All Starline Pistol Brass 15% Off
Among pistol brass options, Starline is some of the best stuff you can buy. Strong and consistent, Starline is a good choice for stout cartridges such as the 10mm Auto, .357 Magnum, .44 Magnum, and .500 S&W. We also like Starline for our .45 ACP loads. Right now you can get significant savings on Starline’s entire stock of cartridge brass (both regular and nickle-plated). Midsouth is running a 15% Off Starling Sale now through 8/8/2017. Take advantage of these 15% Off Savings before the sale ends on Tuesday, August 8, 2017 at 11:59 PM.
9. Amazon — Neiko Digital Calipers, $16.79
Even if you have a good set of calipers, you may want to get one of these Neiko 01407A Digital Calipers. The #1 best-selling digital caliper on Amazon.com, this Neiko tool features a large LCD Screen and measures up to 6.0 inches. With 2850+ customer reviews, this product has earned an overall rating of 4.4 out of 5 stars. It’s hard to go wrong for $16.79, even if you just use these as a spare set for measuring group sizes and case trim lengths.
Creedmoor Sports has released a series of helpful “how-to” videos in its new InfoZone web page. In the latest InfoZone video Bill Gravatt shows how to seat bullets using L.E. Wilson Hand Dies and an Arbor Press. The basic process is simple, particularly with a micrometer-top seating die. That makes it easy to adjust and set seating depth. Before you start seating bullets, you want to adjust the height of the arbor so the stroke is appropriate to the height of your die.
Bill Gravatt Shows How to Use Hand Seating Dies — Creedmoor INFOZONE
ARBOR PRESS TECHNIQUE: When using an arbor press, smooth is good. You don’t want to slam the handle down quickly. Try to repeat the same motion each time. You can also experiment by seating the bullet part way, then rotate the cartridge (in the die) and do the final seating with a second stroke. If your arbor press has a force gauge, note both the max value of the gauge needle and how it moves as you seat the bullet. If the needle spikes too rapidly, or bounces back and forth irregularly, set that cartridge aside and/or mark it. You could have neck tension issue with that case or some other fault. You might even have a bad bullet. That’s rare, but can happen. The key to success is moving the press arm in a smooth motion every time, maintaining the same down-pressure with each cartridge.
Here Bill Gravatt Offers a Simple Tip for Adjusting Wilson Seating Dies
One of our Forum readers asked “How can I get a custom in-line seater for my new rifle?”. First, we would say that, if you are not shooting an unusual Wildcat, check first to see if L.E. Wilson makes a stainless Micrometer Seater Die for your rifle. These dies are a joy to use, and we’ve found the fit to be exceptionally good with many calibers. Typically priced from $90-$100, Wilson stainless micrometer-top seaters are available for dozens of cartridge types: .204 Ruger, 20 BR, .222 Rem, .223 Rem, 22 PPC, 22 BR, .22-250, .223 WSSM, 6 PPC, 6mmBR, 6XC, 243 Win, .243 WSSM, 25 WSSM, 6.5×47 Lapua, 6.5 Creedmoor, 6.5-284, 26 Nosler, .270 WSM, 7mm-08, .284 Win, 28 Nosler, 7mm RUM, 30 BR, 30 IHMSA, .308 Win, .300 WinMag, .338 Edge (and MORE).
If you do want a custom seater die, the process is relatively simple. Purchase a die blank from Wilson and have your gunsmith run the chambering reamer in. Forum member Gunamonth explains: “I start with a Wilson seating die blank. They’re available from Sinclair and other vendors. Just run the reamer in. For some of my rifles, where I wanted the stainless die with the micrometer adjustment, I bought a smaller die and had the smith ream it with the chamber reamer. That’s how I had my 6 Dasher and 6mm AI seaters made. With the Dasher I stared with a 6mmBR Micrometer die.”
SEATER STEM TIP: If, on your seated bullets, you are seeing a sharp line around the jacket near the ogive, you may want to smooth out the leading edge of the Wilson seater stem (see above left). Do this by putting a little lapping compound on one bullet and manually spin this around in the stem. Without much effort you’ll have a smooth bullet/stem interface.
Micrometer Top Add-on
We really like micrometer tops on a seating die. But what if Wilson doesn’t make a micrometer top seater for your chambering? Don’t despair, Sinclair Int’l sells a $39.99 micrometer top that can be added to Wilson standard seaters or to a custom seater die made from a Wilson die blank.
Even with high-quality brass from Lapua, Norma, and RWS, occasionally you may find one or two cases per box which have a small flake or obstruction in the flash-hole. This will appear like a thin crescent on one side of the flash hole (see photo). You should inspect ALL new brass before loading to identify any pieces with a partially-obstructed flash hole. It’s a good idea to remove any flake or thin crescent left as an artifact of the flash-hole forming process. Because the flash-hole itself is normally centered and of the correct diameter, it is not necessary to ream the flash-hole to a larger diameter. All you really need to do is remove the small obstruction(s). This can be done quickly with inexpensive tools.
Use a Small Pin Vise to Remove Flash-Hole Obstructions
Folks have asked if there is a tool that can remove obstructions from a Lapua small, BR-sized flash hole without opening the hole size. The Lapua PPC/BR flash hole is spec’d at 1.5mm, which works out to 0.059055″. Most of the PPC/BR flash-hole uniforming tools on the market use a 1/16″ bit which is nominally 0.0625″, but these often run oversize — up to 0.066″.
If you want to just clear out any obstructions in the flash hole, without increasing the flash hole diameter, you can use an inexpensive “pin vise” with an appropriate drill bit. For $0.99, eHobbyTools.com sells a 1.5mm drill bit, item 79186, that matches the Lapua flash hole exactly. Other vendors offer a #53 pin vise drill bit that measures .0595″ or .060″ (depending or source). An 0.0595″ bit is close enough. You can find pin vises and these small-diameter drill bits at hobby stores.
For quite some time, Sinclair Int’l has sold a similar device for small (PPC and BR-size) flash holes. Like the 07-3081 unit for large flash holes, the 073000 Reamer for small flash holes works from the outside, so it can index off the primer pocket. It reams to .0625″, and also costs $39.99. The standard dimension for Lapua 220 Russian and 6mmBR flash holes is 1.5mm or .0590″. This tool will permit standard-size decapping rods with .0625″ tips to work without binding. However, note that both Forster and Redding normally supply .057″ decapping pins with their PPC and BR dies. So, it is NOT necessary to ream your Lapua BR/PPC flashholes, unless you prefer to do so for uniformity. It IS, however, a good idea to check BR/PPC flash holes for burrs before loading the first time.
NOTE: If you purchase either the 073081 or 073000 Sinclair Flash Hole Reamer tools, we recommend you mic the cutter tip before you process a bunch of cases. Sometimes a tip comes through that is oversize. This will ream the flash holes larger than you may intend.
At the request of our readers, we provide select “Deals of the Week”. Every Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, 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.
1. Natchez — Rock Chucker Supreme Reloading Kit, $249.99
Everything you see above can be yours for just $249.99, a great deal. Right now, Natchez is selling the Rock Chucker Supreme Master Reloading Kit for $279.99. That’s a great deal considering all the hardware you get. Heck, the Rock Chucker press alone is worth $150.00+. Considering all you get, this is a heck of a deal. The Natchez price is $70-$90 cheaper than many other vendors. For example, MidwayUSA’s price is $329.99 for this same kit!
If you have been waiting to get a MagnetoSpeed… wait no longer. Priced at just $159.99 at MidwayUSA, the MagnetoSpeed Sporter model costs less than half as much as MagnetoSpeed’s V3 models. This is a special promo price — the best we’ve found (you’ll pay $179.99 or more elsewhere). This chronograph attaches directly to your barrel so you don’t have to go downrange to position tripods and set up skyscreens. For most people the Sporter Model contains all the features they need. READ MagnetoSpeed Sporter Review.
IMPORTANT: To get the $159.99 price you must place the item in your shopping cart. Yep, this is real — we placed it in our own shopping cart to confirm, as you can see above.
3. Burris — $100 Rebate on 4-16x50mm Eliminator III LaserScope
The Burris Eliminator III is an impressive piece of electro-optical technology. With a push of a button, a built-in laser rangefinder senses the distance to your target and the Eliminator’s microprocessor instantly calculates the required hold-over. The calculated aiming point is then displayed in the reticle with a red dot on the vertical cross-hair. Just put the bright red dot on the target and make the shot. Burris is now offering a $100 Mail-IN Rebate on 4-16x50mm Eliminator III LaserScopes (#200116) purchased between July 1st and October 31st, 2017.
4. CDNN Sports — Ruger 17 HMR American Compact, $249.99
With ballistics far superior to a .22 LR, the 17 HMR is ideal for prairie dogs and small varmints out to 180 yards or so. Now you can get a reliable, name brand 17 HMR rifle for a very attractive price. That’s right, CDNN Sports is selling the 17 HMR Ruger American Rimfire Compact, with 18″ barrel, for just $249.99. That includes two (2) comb units and a FREE padded carry sling. FFL required.
5. Monmouth Reloading — Nosler RDF Bullets, $28-$29 per 100
Nosler’s line of RDF (Reduced Drag Factor) bullets have high BCs for their weight. Precision shooters are reporting outstanding accuracy. Given their high performance and consistency, RDF bullets represent a superior value. At Monmouth Reloading you can get Nosler RDFs for under $29 per 100 for popular 6mm, 6.5 mm, and .30-Cal sizes. That’s up to $20 less per box than some premium brands.
6. Amazon — FosPower 10200 mAh Waterproof Charger, $22.99
When you’re at the range or on a hunt, it’s smart to have a USB-output battery pack for smart phone, target-cam monitor, even a LabRadar. There are many battery packs available, but most are fairly fragile, with exposed ports. This “ruggedized” FosPower 10200 mAh charger is different. It is waterproof, dust-proof, and shock-proof. (IP67 certified: dust and water resistance for up to 3ft/1m for 30 minutes under water.) It can handle all that a PRS competitor or hunter can dish out. It even has a handy LED light. Right now it’s priced at $22.99 with FREE Shipping on combined orders over $25.00.
7. MidwayUSA — $75.00 Gift Card with SIG Optics Purchase
Need a laser rangefinder or medium magnification riflescope? Sig Sauer makes some very high quality products and the latest SIG Kilo rangefinders are class leaders at their price points. Right now you can get a $75.00 Gift Certificate from MidwayUSA with a qualifying SIG Optics purchase. This deal is good through 8/31/2017 (the end of August). To get your $75.00 card, use Code 75GCSIG during checkout. The current qualifying products are shown above.
8. Academy Sports — Federal .22 LR Ammo, $16.99 for 325 Rds
Here you go — name-brand rimfire ammo for just 5.23 cents per round. Can’t complain about that price. This is USA-made Federal ammo at an insanely low price — the $16.99 for 325 rounds is the equivalent of $2.61 for a 50-rd box. Can’t beat that. This Federal Auto Match .22 LR rimfire ammo features a 40gr Lead RN projectile. It feeds well in semi-auto rifles as well as bolt guns.
9. Grafs.com — 5% Off All Smokeless Reloading Powders
Here’s a good opportunity to stock up on your favorite reloading powders. Now through August 2, 2017, Grafs.com is discounting ALL smokeless reloading powders. All smokeless propellants in stock are marked down five percent (5%). This applies to Hodgdon, Alliant, Accurate, IMR, Winchester and more. NOTE: This discount expires at 11:59 pm August 2, 2017 and will NOT apply to back-ordered items.
10. Amazon — Two Rolls of 3″ Neon Target Stickers, $12.95
We like these bright, Neon 3″ target stickers. They are big enough to see easily at 600 yards, giving you a 1/2 MOA target center at that distance. For $12.95 at Amazon.com, you get 250 3″-diameter self-adhesive centers (125 targets per roll) that stick to almost any surface The high-contrast fluorescent red/orange color provides an excellent HI-VIZ aiming point, along with good contrast for bullet holes that fall within the 3″ circle. To help line up your reticle cross-hairs, the target centers feature black markers at 3, 6, 9, and 12 0’clock. NOTE: These stickers qualify for FREE Shipping with combined orders over $25.00.
Here’s an extreme range of .224-Caliber bullets: 35gr varmint bullet and 90gr match bullet. Of course, along with bullet length/design, you need to consider MV when choosing twist rate.
Even with the same caliber (and same bullet weight), different bullet types may require different rates of spin to stabilize properly. The bullet’s initial spin rate (RPM) is a function of the bullet’s muzzle velocity and the spin imparted by the rifling in the barrel. You want to ensure your bullet is stable throughout flight. It is better to have too much spin than too little, according to many ballistics experts, including Bryan Litz of Applied Ballistics. Glen Zediker has some basic tips concerning barrel twist rates and bullet stability. These come from his latest book, Top Grade Ammo.
Choosing the Right Twist Rate
I’d always rather have a twist too fast than not fast enough. Generally… I recommend erring toward the faster side of a barrel twist decision. 1:8″ twist is becoming a “new standard” for .224 caliber, replacing 1:9″ in the process. The reason is that new bullets tend to be bigger rather than smaller. Don’t let a too-slow twist limit your capacity to [achieve] better long-range performance.
Base your next barrel twist rate decision on the longest, heaviest bullets you choose to use, and at the same time realize that the rate you choose will in turn limit your bullet choices. If the longest, heaviest bullet you’ll shoot (ever) is a 55-grain .224, then there’s honestly no reason not to use a 1:12″. Likewise true for .308-caliber: unless you’re going over 200-grain bullet weight, a 1:10″ will perform perfectly well.
Bullet Length is More Critical than Weight
Bullet length, not weight, [primarily] determines how much rotation is necessary for stability. Twist rate suggestions, though, are most usually given with respect to bullet weight, but that’s more of a generality for convenience’s sake, I think. The reason is that with the introduction of higher-ballistic-coefficient bullet designs, which are longer than conventional forms, it is easily possible to have two same-weight bullets that won’t both stabilize from the same twist rate.
Evidence of Instability
The tell-tale for an unstable (wobbling or tumbling) bullet is an oblong hole in the target paper, a “keyhole,” and that means the bullet contacted the target at some attitude other than nose-first.
Increasing Barrel Length Can Deliver More Velocity, But That May Still Not Provide Enough Stability if the Twist Rate Is Too Slow
Bullet speed and barrel length have an influence on bullet stability, and a higher muzzle velocity through a longer tube will bring on more effect from the twist, but it’s a little too edgy if a particular bullet stabilizes only when running maximum velocity.
My failed 90-grain .224 experiment is a good example of that: I could get them asleep in a 1:7″ twist, 25-inch barrel, which was chambered in .22 PPC, but could not get them stabilized in a 20-inch 1:7″ .223 Rem. The answer always is to get a twist that’s correct.
These tips were adapted from Glen’s newest book, Top-Grade Ammo, available at Midsouth. To learn more about this book and other Zediker titles, and read a host of downloadable articles, visit ZedikerPublishing.com.
In our Shooters’ Forum a reader recently asked: “How much neck tension should I use?” This prompted a Forum discussion in which other Forum members recommended a specific number based on their experience, such as .001″, .002″, or .003″. These numbers, as commonly used, correspond to the difference between case-neck OD after sizing and the neck OD of a loaded round, with bullet in place. In other words, the numbers refer to the nominal amount of interference fit (after sizing).
Neck-Wall Thickness is Important Too
If you’re looking for loaded ammunition at affordable prices, 
One of our Forum readers asked “How can I get a custom in-line seater for my new rifle?”. First, we would say that, if you are not shooting an unusual Wildcat, check first to see if 
Increasing Barrel Length Can Deliver More Velocity, But That May Still Not Provide Enough Stability if the Twist Rate Is Too Slow
