I am not sure that all the Swedish 9 mm Blanks and Short Range cartridges were reloads; that is, loaded on cases already fired. I was given information years ago that many of them were on rejected lots of cases that failed inspection for tractical loading, but were suitable for blanks and short-range training rounds. An examination of some of mine don’t show any extractor or ejector marks.
I got my black bullet round missing the steel ball in the tip first. I found it interesting and kept it, but assumed it was just a factory error that got by inspection, that is, no steel ball got into the mold. Later, I got my red plastic bullet short-range with the steel ball. That is 99% not likely to be an error, as the bullet producing line would not have had any steel balls on hand for one to accidentally get into the mold. It told me the other was a blank and that the two represented a color reversal for some reason that is, to date, unknown to me.
Both of the cases on my two rounds are from the Karlsborg factory, with “K” headstamp. The black bullet blank is dated 49 and the red bullet gallery load is dated 52. Neither case shows any signs of having been previously fired. Neither case has the primer and case-mouth seals normally association with the blanks and gallery loads (other than the earliest ones and some made much, much later).
Please note that either round is dangerous if fired from a normal firearms. The Swedish K’pist. 45 had an interchangeable barrel with a tapered bore. The steel ball rounds were fired through that barrel and are at least as dangerous as a fairly high-power BB gun when fired through the correct barrel, where the plastic is broken up in the bore. Perhaps it is even more dangerous from a normal barrel when the entire projectile, plastic and steel ball, leaves the barrel. The blank was fired in service through the tapered bore barrel but had a muzzle adaptor that basically turned the plastic into red dust, leaving it fairly safe for training. Fired out of my four-inch barrel Luger, one of these blanks, fired at pretty much point-blank range, penetrated a piece of 1/4" construction grade ply wood. Under the right circumstances, fired from a normal 9 mm barrel, they could be lethal.
This has been covered before, in detail, with correct terminilogy for the conversions and pictures of it, on this forum. My mission here is that anytime they are mentioned to a new audience, that a caution be given. I had 5,000 rounds of the blanks years ago, and did quite a lot of informal testing with them, not only for penetration, but also for accuracy from a pistol at various distances from a target. After a couple of yards, they become very inconsistant in accuracy. By 25 yards, the diameter of the “cone of fire” reach almost five feet. So, they are even dangerous, in a sense, to use for just plinking through a regular firearm. all my test was done with the same Luger, the only 9 mm pistol I had at the time that I cared to shoot that stuff through.