In case you haven’t noticed, ammunition is both hard to get, and expensive right now. Oh, you have? Maybe the solution, or at least one partial solution, is a sub-caliber trainer. This is something that has been around pretty much from the start of cartridge-using firearms. A century-plus ago, it seems as if every military organization had either “gallery” loads, down-loaded regular service cartridges, or rimfire clones of their service rifle. Even when ammo was cheap, governments were loathing to spend any more on ammunition than they absolutely had to.
Well, the age of rimfire service rifle clones is back upon us, in part because ammo is expensive, but also because it isn’t always easy to find a range where you can shoot centerfire rifle cartridges at distance. (And .223…