I went back and checked my notes. The blue dot needs replacing with trail boss. There may be other powders, if you get lucky to find reloading stuff now, even with 4 shops in the area.
Agreed, was looking for a cartridge like a .22wmr but one that could be reloaded. I think eventually the
.221fb will do it, and have a CZ 525 switch barrel cut with the same reamer. With today's price of rimfire ammo, I know these will shoot cheaper, farther, and more accurately.
Found once fired brass for .221fb and 300BO made by a machinist/vendor on the 300blkout site. Great guy to deal with, very reasonably priced! A curiosity, his shop near Prescott is solar powered.
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