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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
  • shotshell reloading
  • bullet reloading
The Ultimate Reloading Manual
load development

Handloading the Largo

Author: Bob Campbell / Wolfe Publishing Co.
Date: Apr 02 2013

As a basis for procedure, we began our trials by consulting data for the .38
Super. Next, we interpolated modern experience gained in loading the .38 Super.

While the pursuit of accuracy and high performance is interesting, we sometimes overlook the fact that handloading is the only means of obtaining a reliable supply of ammunition. So, the first need is to have something to fire in the piece. Performance and economy are secondary considerations. Such is the case with the 9mm Largo pistol. Although factory Blazer ammunition is now available, for most of my shooting career, 9mm Largo ammunition has been difficult to obtain. This is unfortunate, as the pistols that fire the Largo are often well-made, interesting pieces. On the other hand, the low availability of ammunition is among the reasons the price of the pistols has remained depressed. This is okay by me, as an inexpensive pistol taking custom ammunition fits my personal criteria well for recreational shooting.

I have experimented with several pistols in this caliber, including the Astra versions, but my favorite by a considerable margin is the Star Super. The Super is a good-looking pistol obviously closely related to other Browning derivatives, but it is more than a clone of any other pistol. It offers unique features that set it apart from the crowd when first introduced and remains modern even today. After decades of producing Browning-type locked-breech service pistols, Star introduced the Star Modelos Super just after World War II. According to historians, the pistol was produced until the early 1980s. There were many variations on the theme and factory records are scarce, but suffice to say the pistol enjoyed wide popularity. The Super was produced in 9mm Luger, 9mm Largo and .38 Super. The most common chambering seems to be 9mm Largo. The main differences in the pistols are in the breech face. The .38 Super requires a wider breech face to accept the semirimmed .38 Super cartridge. The pertinent dimensions are 9mm breech face, .384 inch; and .38 ACP Super breech face, .405 inch.

The two types of magazines are illustrated in this
photograph. The solid follower type (left) gave
better feed results. The incline of the feed path is
a bit higher with this follower.

The “Super” designation denoted improvement in the mechanical aspects of the pistol, not necessarily the .38 Super chambering. The pistol has advanced features that would not be out of place on a modern 1911. These include an external extractor and a loaded chamber indicator similar to that found on my most modern 1911, the Smith & Wesson SW 1911. The loaded chamber indicator is simply a cut-out in the slide that reveals the base of the cartridge case if the piece is loaded. There is also a full-magazine indicator, simply a small piece of metal that protrudes from the bottom of the magazine if it is fully loaded. The sights are among the best of any service pistol of the era. Compare the Super’s sights to a 1950’s 1911, Browning, Beretta 1951 or French 1950 and you will see the comparisons I base my opinion upon. The sights featured a white inlay when new, but most will have long seen this inlay worn off.

The recoil spring guide is captive, and lockup is achieved by angled camming surfaces instead of the swinging link of previous Star pistols. The Tokarev and the French 1935 were the last new pistols (other than 1911 clones) to use the swinging link. The use of the High Power-type lockup allowed a revolutionary new takedown system. With the magazine removed and the slide in battery, a lever on the right side of the pistol is turned down and the slide can be removed. This is a fantastic advancement, a noteworthy improvement in service pistols that has not been adopted by other single-action service pistols. Detail changes in the magazine safety and trigger action were also introduced.

Given the improved takedown, the pistol is rather simple to field strip. It is all Browning in this regard. The safety system bears some discussion. While 1911-like, the Star system positively locked the hammer when the safety is “on.” Unlike the 1911, however, the safety may be applied when the hammer is in the down or fully forward position as well. There is no grip safety.

Overall, our Spanish friends saw the Star Super as a singular improvement over previous single-action pistols, and essentially they are correct. We probably would not have as much experience with the piece save for the importation of the Star Super in great numbers during the past decade or so. These pistols vary in age and condition, but they are available for less than $200, a light tariff for a high-quality pistol.

Feeding the Largo

The Star Modelo Super, compared to a modern Springfield pistol,
is obviously similar to the 1911 pistol but with some features
Bob feels would be an improvement on the 1911.

The 9mm Largo is longer than the 9mm Luger. Case length is the same as the .38 ACP, .900 inch. At least that is the measurement of the majority of Largo cases. Some sources quote .910 inch as the proper length. Modern CCI Blazer aluminum cases measure .900 inch. The case is quite similar to the .38 ACP save the Largo does not have a semirim, a design that sometimes gives trouble in the .38 Super, so its deletion is all to the good. At one time, the only ammunition available was military surplus of suspect property. Some used corrosive primers. Handloaders could not use Berdan-primed brass – at least not easily – and we really prefer not to use brass that once used corrosive primers. The obvious answer was to use .38 Super brass. Sometimes, the Super brass worked just fine. Other times, the rim hung up on the breech face. This is an individual thing, but in my experience the Star Super most often demands the correct rimless brass while others are less exact. When the piece will not accept .38 Super brass, the answer is to relieve the breech face to the proper dimension.

When the market became sufficient for factory loaded ammunition in the Largo caliber, Speer developed the Blazer loading. There are two versions, one using the 124-grain Gold Dot bullet and the other using a full-metal-jacket bullet. Each develops about 1,100 fps. This is conservative in respect to older steel but warm enough to operate the action. Berdan-primed aluminum cases are not reloadable, but at least we have a factory product for casual use. I prefer to use the correct cartridge case, as the true 9mm Largo features a larger extractor groove than the .38 Super. Common sense tells us the case the firearm was designed to accept would have the greatest potential for reliable function. Fortunately, Starline has come to our aid with quality, affordable 9mm Largo brass. This is a great boon and allows concentration on load development rather than hours spent making cases or modifying the piece.

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