Kiwi Bob, Check out Wolfe publishing, Rifle and Handloader. I cant pinpoint the exact issue#, but there were back issues, say within the last 5 years with both rifle and cartridge articles. Also, Ken Waters did a write up in his "Pet Loads" articles. One other thing, I know these rifles were meant to be shot, and some features were way ahead of there time, I'd check on the value( assuming its a Newtom Rifle). You might, or already do, have something special here. Good Shootin'
CRASH