Here's my 2 cents worth on it.
To start with, there's no way I'd allow myself to be at the mercy of import/export laws to participate in a hobby that I enjoy. Period. That's the hard headed German in me. If I was in Canada, that would mean making my own bullets.
With a 7 ogive , the options of using either the .925" or 1.00" are both open. And I don't like not having options. The BIB 118 1.00" 10 ogive bullets shoot like the Hammers Of Hell and have a base to ogive in the .325 range. My 7 ogive 1.00" 117's have a base to ogive in the .370 range. A few taps on the calculator tells us the base to ogive on a 10 ogive .925" jacket is going to get pretty short. How short is too short? Darned if I know as I've never been there. Randy could offer some guidance there.
Steel or carbide? That's a question only you can answer. I'm a believer in starting at the start on things...start with your budget since that's the 900 lb. gorilla in the room. Since great bullets can be made with either, drop everything else in order after that...availability, availability of replacement parts/pieces, delivery time, support, etc.
Other than occasionally working with Randy's dies when I'm at his place, my practical knowledge of working with carbide dies just brings the needle slightly off the '0' mark on the scale.
If you go with the Blackmon setup, I'd be happy to offer whatever help I can.
Is your 30BR up and running?
Good shootin'. -Al
Its getting the final inletting and bedding done now.