If you are coming to Newf, and are worried about ammo. Get your guide to order a box from withing Canada. Tradeexcanada.com is my favourite supplier for 9.3x62 ammo, components for reloading, and second hand gun, barrels, and actions. Rare in Canada to find anything that "complete" in one place, but they must have got stuck with a load of stuff. I have no connection with them.
Barnes makes a lot of bullets for stuff like 30-30 and 45-70 that are not run away trains on velocity, and they tailor the dynamic to those velocity levels for those bullets. The 62 is the commercial sweet spot for 9.3s, so I would have no qualms about using a TSX on Moose. I have loaded Prvi having both black bears and moose on my property, and am just getting going on load development. Unfortuntely in NB owning the property doesn't mean you can hunt it, so I can't give any reports.
My thinking on the Prvi is even if it separates into two parts, the core is enough to do the job. And while we are at it, imagine what it feels like to use your ribs and lungs to separate a 286 grain bullet at 2350 fps, you have to invest a lot of tissue into tearing the jacket from the core. Think it is difficult to open those clam shell packets everything that hangs on a hook is sold in these days... I has to be tougher to peel apart a 286 Prvi.
That said, you have to have an idea of what performance you are looking for. I am hunting for meat, so I want to blow through the lungs with the shortest wound channel. It is game over when an arrow from a 50 lb traditional bow takes that path let alone a bullet with significant killing power. But if you want to back up a client who botched the shot from any angle; or drop a moose from any raking angle that takes off with a medium wound after a deflection of the your original shot; or you need to be able to deal with large bears that may also be in the area, then something other than a TSX might be the ticket.
