Cool deal. I always thought a rook rifle would be a fun thing to get running, even if it needed some obscure/improvised components. Light single shots of modest power just have a good feel to them. Love to find a good low wall that way.
Bristoe, on the slow burning powders in a straight case, will you get a tight enough bullet fit with a .320 expander, to have consistent ignition? Most guides I've read say that in the straight walled case handgun rounds, you need a tight bullet fit and strong crimp to get the least velocity variation, especially with slower powders. I think Dave Scovil published some data to that effect a few years ago. He was targeting revolvers - while you don't need the bullet tightly anchored for function in a single shot rifle, doing so helped consistency, was his point.
Lil'Gun has just about replaced 296 for me.
