SIG Sauer Ammunition has introduced its first personal defense revolver cartridges, with loads in 38 Special, 44 S&W Special, and 45 Colt.
“With the recent proliferation of small-frame revolvers for personal defense, the demand for ammunition in these calibers is growing significantly,” said Dan Powers, president of the SIG Sauer Ammunition Division. “SIG Sauer continues to expand caliber offerings for handgun shooters, which now includes the revolver market, and there will be introductions of additional revolver calibers in the coming weeks.”
All three cartridges are available in the SIG V-Crown jacketed hollow point (JHP) round of Elite Performance Ammunition in the following bullet weights:
— 125-grain 38 Special with a muzzle of velocity of 900 fps;
— 240-grain 44 S&W Special with a muzzle velocity of 800 fps; and
— 230-grain 45 Colt with a muzzle velocity of 950 fps.
Bullets are SIG Sauer’s proprietary V-Crown stacked hollow point. Ducta–Bright 7A coated brass cases provide enhanced lubricity and corrosion resistance.
The 38 Special is also available in SIG FMJ full-metal-jacket loads. Designed specifically for practice and competition shooting, these premium target rounds feature solid brass cases and copper-jacketed bullets that remain intact on impact. Clean-burning powders are used to reduce barrel fouling.
Click here to see ballistics for the SIG Sauer Ammunition line.
Click here to see our selection of SIG V-Crown bullets.
The following is a specially-adapted excerpt from the forthcoming book,” Top-Grade Ammo,” by author Glen Zediker, owner of Zediker Publishing. Click here to order.
Last time I gave a caution about respecting one of the differences between semi-auto and bolt-action rifles, and that was with respect to propellant burn rates. The summary reason for that is that different rate propellants will “peak” at different areas as the expanding gases and the bullet travel through the bore. Slower-burning propellants peak farther, and that means more pressure is available at the gas port location in an AR-15, for instance, as the bullet passes it. If the system is oversupplied, then the system is overworked.
Compared to ideal function when gas supply is delivered as engineered, mistimed peak pressures can result in the bolt unlocking too quickly and excessive bolt carrier velocity rearward. The system just gets hit too hard. The extractor tries to yank the case out of the chamber too soon, before the case is released from its grip on the chamber walls (from being expanded through firing). Spent-case condition shows a measurably more abused hull. Probably the worst popular example of these effects is the M1A. I’m doing an entire column or two on reloading for this beast. Essentially, a spent case from an M1A will show dimensions that don’t seem possible. These come from the bolt unlocking too quickly. AR-15s actually handle excessive pressure better than some other designs.
Always keep in mind that this is all happening in about 2 milliseconds. Average time a bullet spends in the barrel, for most modern centerfire rounds, is 0.002 seconds. Timing is everything.
Keeping in mind the behavior of a pressure curve, which is like a wave cresting, factors that influence the amount of gas-port pressure, using the same load, include barrel length, gas-port size, and gas-port location. When the bullet is sealing the bore, the longer the barrel, the more pressure is contained for a longer time. The smaller or larger the gas port size, the slower or faster the gas enters the system. The farther back or forward the port is located, the sooner or later. Bullet weight is a factor also: heavier bullets accelerate more slowly (and also the reason heavy bullets erode the chamber throat more than lighter bullets).
And, the amount of volume inside the bore has a huge influence on all this. That matters when we’re using another caliber than .224 in an AR-15 or .308 in a big-chassis AR (like an SR-25). For instance, in that rifle chambered for .243 Win., but retaining the gas system specifications (gas port size and location) of the .308 Win.–chambered rifle, there’s way more pressure only because there’s less space, less volume, in the bore. The opposite is usually true when we’re running an AR-15 with a larger caliber bullet.
Selecting a propellant with a suitable burning rate, which, again, is something in the vicinity of H4895, is really the only thing we can do on the loading bench to ensure that we’re not contributing to these symptoms. Beyond that, dealing with excessive pressure gets technical.
All my NRA Match Rifles, which usually have 26-inch barrels, get their gas ports moved forward one to two inches. These, of course, are custom-barreled. I also usually install an adjustable gas manifold.
Moving the port forward effectively delays the wave of gas moving through the bore, kind of repositioning its peak with respect to its outlet; there is more space available for expanding gases. It also allows a little slower-burning propellant, which can take more advantage of the longer barrel. It’s common in a similarly constructed AR-10 to get a port moved as much as 5 inches forward to accommodate a .243 Win. or .260 Rem. chambering.
The adjustable manifold allows some tuning. There are essentially two forms these take. One way is to restrict or limit the through-flow; the other just bleeds it off. I like the first kind the best.
Also, I have searched far and wide for a consensus on gas-port sizes, and came up empty.
All this changes with different chamberings and rifle configurations. Carbine-length barrels are particularly sensitive to port pressure because the port is located farther back.
There are a few surefire things that will alert you when your rifle is exhibiting “over-function” symptoms, such as spent-case condition showing excessively blown (extended) case shoulders, extractor marks on the case rim, and a generally explosive sensation in functioning.
In a more extreme circumstance, an over-accelerated carrier can “bounce” back from its rearmost travel so quickly that a round can’t present itself in time to be picked up by the bolt, or the bolt stop can’t engage quickly enough to hold the bolt carrier.
Sometimes what appears to be a “light” load is actually not. I’ve seen excess pressure leave a spent case in the chamber because the extractor lost its grip, and I’ve seen chunks pulled right off case rims. That’s severe. That’s also another cause for the “short-stroke” appearance of over-function: the extractor issue has slowed the carrier.
If you’re having any problems with “over-function,” solutions include retrofitting an adjustable manifold, increasing carrier mass, installing a stouter buffer spring. I do all those things on my rifles. Keep in mind that I am primarily a Service Rifle shooter, and I am trying to push an 80-grain bullet as fast as reasonably possible from a 20-inch barrel that can’t get the modifications mentioned. I know a thing or three about delaying bolt unlocking — I’ll cover more on this topic if you all want to know.
Midsouth Shooters Supply sells a ton of Hodgdon powders, because, of course, the company makes great products our customers love. But Hodgdon powders are also popular because the company’s experts are willing to help folks get started in the craft or guide experienced hands toward new reloading ventures. Whether you’re new to reloading or a seasoned vet, there’s always something more to learn.
That’s where Hodgdon’s Reloading Education section comes in. The company has stockpiled a wealth of information that can help take your handloading to the next level. Over the next few weeks, we’re going to look at Hodgdon’s online system for building top-rate rifle, pistol, and shotgun loads and give you some pointers on how to make time-saving and money-conserving choices on brass, bullets, and powders.
Click here to see the landing page on which Hodgdon begins the education process.
Select the Reloading for Beginners tab to learn the basics, from the effect of crimp depth in shotshells to reloading the .223 to matching shot type and size to reloading data.
Midsouth also recommends you spend some time learning about Safety. Click that tab to brush up on the do’s and don’ts of reloading, starting with the basic reloading precautions created by the NRA.
Then, select the Tips and Tricks tab for informative posts on key topics in the reloading community.
Here’s a sample of some of the things you’ll find on the site:
Good news for reloaders, in this time of powder drought. IMR Legendary Powders has created a new line of sophisticated extruded powders that are loaded with more features than any other brand of powder available today. Better yet, these latest propellants do more than send your projectile down range! Enduron™ Technology features a built in copper fouling eliminator, insensitivity to temperature extremes, small sized grains for easy flow with an ideal loading density, and there are no ingredients considered harmful to the environment. Consult the 2015 Hodgdon Annual Manual for load data and more. Those looking to load for intermediate calibers are in luck as well, since 4166 has a similar burn speed to that of 4064 or Varget. This make’s it versatile enough to load .223 Remington.
From accurateshooter.com- IMR claims that Enduron powders are not sensitive to temperature changes. If this is true, these powders should prove popular, particularly IMR 4166 which seems to be in the Varget/Reloder 15 burn-rate range. With Varget so hard to find, if IMR 4166 proves accurate (and available) we might see many .308 Win shooters make the switch. IMR states that IMR 4166 is a “versatile, match grade propellant”. We’ve been quite pleased with IMR 8208 XBR as a Varget alternative. IMR 8208 XBR is accurate, clean-burning, and offers good velocity. Perhaps the new IMR 4166 will be as good or better…
As of right now, these powders are available right here, at Midsouth Shooters Supply, as well as many others. The supply isn’t steady, but more plentiful than in the past several months. Check often for availability, as our inventory is live, and they move fast. If you haven’t already, make sure to join us on Facebook for a heads-up on powder and 22 LR arrivals.
– IMR 4166™ is the first in the series of Enduron™ propellants. It’s a perfect burn speed for cartridges like the .223 Rem, 308 Win/7.62mm NATO, 22-250 Remington, 257 Roberts and dozens more. IMR 4166™ is a positively versatile, match grade propellant.
– IMR 4451™ Another new Enduron™ powder that gives top performance in the venerable 30-06, 270 Winchester and 300 Winchester Short Magnum, to name just a few. This propellant is ideally suited for many mid-range burn speed cartridges.
– IMR 7977™ is the slowest burn rate Enduron™ Technology powder. It is a true magnum cartridge propellant with outstanding performance in such cartridges as the 300 Winchester Magnum, 7mm Remington Magnum, 338 Lapua and more.
Coming in February 2015, Hornady Manufacturing unveils its new line of quality reloading dies at an incredible price. The American Series currently covers 5 of the most popular Rifle Calibers with a Two Die Set, and 4 of the most popular Handgun Calibers with a Titanium Nitride 3 Die Set. Each of the sets offer more value by including 2 extra de-capping pins, Basic Reloading Data and a Free Shell holder. It’s hard to find this much quality at such an affordable price. Keep reading to see all the features of the American Series Reloading Dies.
Each die set includes a FREE shell holder. Basic reloading data and two extra decapping pins are also included.
The 3-die American Series sizes dies feature an industry-leading titanium nitride sizing ring that reduces friction and case sticking, and helps prolong case life.
Select pistol dies are taper-crimp capable (9mm Luger, 40 Smith and Wesson/10mm, 45 Auto).
Sizing dies size to SAAMI specifications.
Internal spindles, expanders, and seating stems are interchangeable with other components on the market.