I recently bought a couple of Colt Super 38s and a dozen Ed Brown magazines for them. Really nice shooters and they seem to work properly so far.
I was looking to buy a 1911 on Gunbroker, and found one I liked. As part of my due diligence I did an image search for the pictures he used, and found them on a 1911 message board. I looked at his completed auctions and saw that he'd buy a 1911, post pics of it, receive accolades from other forum members about his amazing collection, then sell it on Gunbroker to buy another, thus giving the illusion of a bigger collection than he actually had.
Prior to the advent of the .357 Magnum, only two factory calibers could reliably penetrate car bodies and reach the occupants inside from a handgun.
7.63mm Mauser (i.e., Broomhandle Mauser)
.38 Super
The .38-44 and .44 Special could only do so with hot handloads and .45 LC/.45 ACP could reasonably penetrate window glass, but had trouble with the thicker steel bodies that also tended to have wood reinforcements in them.
Anyways, Texas Rangers and other lawmen assigned to working organized crime/bank robbery tended to favor the .38 Super 1911, because of the penetration and fast(er) reloads. Though many clearly used .45 1911s, .44 Triple Lock Smiths, and .45 LC revolvers of various stripes. If one visits the Texas Ranger Museum in Waco, Texas - you will see a lot of Wolff & Klarr derived Smith revolvers and Colt 1911s. 1911s that date from prior to 1945 are about evenly split between .45 and .38 Super - post 1945, they are almost all .45.
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A .38 Super CCO-pattern gun is on my want list. I love me some .38 Super - it's stupid and I shouldn't want it (hence why I call it .38 STUPer)...I still wants it.
Now, is Wilson discontinuing their .38 Super ammo? That's about the only load out there not from Double Tap, Underwood, or Buffalo Bore.