I'm also intrigued with the 20 vartarg and wish I had bought lapua when it was being made. I have several hundred remington I'll be playing with when I get around to having one made.
Elite 3d design make a cutoff jig for the fireball cartridges $18.39 ...cut off 223 case run it through the sizing die and trim...easy works great for my 221
This unopened bag has been in my brass tote for years, I've never owned a 221 FB, the head stamp reads 223 MATCH BHA, I'm assuming all 50 are in there because it's never been opened, it looks like 50, if anyone has any interest in them make me an offer by PM, I have no idea if they're worth anything or not.