The mods have asked in the past that all threads about guns and ammunition be posted in fair game. I suspect that Mrostov is complying with that even though we are talking about blanks.
Well, the reason I asked about it was due to a conversation involving how a number of people, myself included, on this side of the pond have been experimenting with using those blanks and .22 caliber airgun pellets as a substitute for .22LR rimfire ammo. This is both as a survival issue and it has also been prompted by the recent, serious shortage of .22LR ammo over here. During the shortage, the only two types of ammo that were almost never in shortage were shotgun shells, mainly 12ga, and airgun pellets. Those blank cartridges were also quite plentiful.
The question came up about this type of ammo pertaining to Europe, whether those across the pond would have access to it, which was why I asked about the availability. My guess is that with a drop in adapter, blanks, and airgun pellets, someone with only a shotgun license over there could effectively use these types of loads without having to bother with an actual .22 rifle and obtaining .22 rimfire ammo.
These loads have proven to be surprisingly accurate and effective. The .22 caliber airgun pellets reach impressive velocities, and they achieve adequate spin, making them stable in flight and accurate. Using these loads helped conserve existing supplies of .22LR rimfire ammo.
Some people have been loading the pellets into the muzzle of rimfire weapons, like a musket with a cleaning rod serving as a ramrod. I load mine through the breach whenever possible. Mostly what I have used them in have been drop in .22LR adapters for 12ga shotguns. I have three rifled 12ga to .22LR drop in adapters, one is a 2-3/4" GaugeMate made for pump shotguns, and for break open use only I have a 3" Short Lane and a 7" GaugeMate. Single shot, break action .22 rifles can also be more easily loaded through the breach, similar to a drop in adapter for a shotgun.
Here, these drop in adapters are not considered firearms, and can simply be ordered through the the Internet and sent via mail. They have an offset bore so they use the centerfire shotgun's native firing pin. A .22LR bullet's official spec is .223" vs the .224" of a .22 centerfire and the .22mag. A typical .22 airgun pellet is .221", which is still adequate for grabbing the rifling and the pellet's skirt also helps grab the rifling.
I'll drop a pellet into the breach and push it into the beginning of the rifling with a short ramrod (a section of wooden dowel rod). The pellet has a 'skirt' that acts a lot like the similar feature on an old Minie bullet on an antique muzzleloading rifle.
The terminal effects upon game have been surprisingly potent, though I don't have any photos at the moment to share.
Here is a YouTube video of some people using these blank cartridges with .22 caliber airgun pellets. Have you ever seen an airgun pellet drill through sheet steel or make a varmint bullet style explosive impact inside a soft target?
https://www.youtube.com/watch?v=MOZpy55U-jY
One of the other reasons for my interest in this type of ammo is that I'm planning on doing some travel sometime in the future on a sailboat, and plan on bringing a couple of shotguns (a pump and a break action) and a couple of air rifles. In most of the Americas, for example, especially Latin America, air rifles are not firearms, no matter how powerful. There are often legal limits on how much actual firearms ammo one can enter ports with, so this can serve as a form of ammo substitute.
For example, with a Mexican hunting license I can enter Mexican territory (the Mexicans are the worst in the Americas when it comes to having firearms on board, unless you have a Mexican hunting license) as a non-Mexican with two sporting style longarms, of non-military caliber, but only 50 rounds of ammo each when entering from outside the country. Two shotguns of the same gauge gives me 100 rounds, plus I can have portable reloading equipment and I can buy as much ammo as I want when in Mexico. Blanks and airgun pellets are not firearms ammo, and drop in adapters are not a firearm.