ALL HAIL the 9MM +P, +P+, +p++++++.....?
it's an interesting conversation piece but not different enough from 9mm +P to be worth sorting thru the brass at the range to find.
TODAY, that's true, for many people. But it wasn't always so.....
1900: Colt introduces the .38ACP. This round was designed by JM Browning. MV was listed as 1040fps with a 130 gr bullet. Like other rounds Browning designed in that era, the case was semi-rimmed.
1902: 9mm Luger hits the market. MV 1050fps with a 124gr bullet.
1908: 9mm Luger adopted by German army. Standard 9mm load changed to a 115gr bullet @ 1150fps around this time.
1929: Colt introduces the .38 Super. 130gr bullet, MV 1275fps. Colt took the .38ACP case, and changed nothing, except the pressure and the name. .38 Super rounds are unsafe to fire in .38acp guns. The reverse, is safe.
Note that the .38 Super was introduced half a dozen years before the .357 Magnum. It was intended to give police a better gun for use against the "auto bandits", being both more penetrating (FMJ + hi velocity) and having more capacity than the .38 SPL or the .45ACP.
This was the situation from the 1930s through the 1970s. .38 Super was
always superior to the 9mm Luger, in terms of bullet weight and speed.
.38 Supers were always made in Colt Govt Model (1911A1) pattern guns. Colt, in the US, and a few of the foreign makers (primarily Spanish) in 1911 class guns. While never extremely popular in the US, the .38 Super became very popular in Mexico and South American countries, due to their laws prohibiting "military calibers" for private citizens.
In the late 1970s, things began to change. In the 80s the change went from a trickle to a flood. Modern JHP bullets in 9mm (bullets that expanded reliably), and the flood of "wondernines", plus the US military adopting the 9mm meant the .38 Super was never going to be more than mildly popular.
The .38 Super did enjoy a brief surge of popularity, among the game players. Some savy folks figured out that, using heavy (150/158gr) bullets & hot loads the .38 Super could make "major" on the power scale, plus provide extra capacity and reduced recoil (from ported guns) over the .45, a useful benefit for winning the game.
Also, at this time, it was discovered that the usual mediocre accuracy of .38 Supers could be improved. From the beginning, the .38 Super was made to headspace on the rim, like the other Browning designed semi-rimmed rounds (.32ACP, etc). Bar-Sto made barrels (and others quickly followed) that headspaced the .38 Super on the case mouth (like the 9mm and .45acp) which led to better accuracy, over all.
Loading the .38 Super heavy to make major had its drawbacks. Cases would let go (where they were unsupported) often enough that the term "Superface" entered the gamesman's vocabularly. This also led to changes in the way barrels were made.
Our commitment to the 9mm Luger was firm, but it was not as good a performer as we wanted. This led to the 9mm+p and later the +P+ 9mm ammo, which, essentially matches the .38 Super speeds with lighter bullets.
other developments in both cartridges and guns since have left the .38 Super firmly in its niche. It is still a very popular caliber, south of the US border.
Today, because of high pressure 9mm loadings AND a wide variety of modern guns, the .38 Super is low on the list of good choices for a duty handgun. For a personal defense handgun, it is a good as it always was, and with JHPs, even better.
For a brief time, back in the day, you could get a Tommygun in .38 Super. That would be fun!