It should handle standard .264" bullets with no problems.
Brass you can get from Trade-Ex.
Primers are the same as for other ammo: Large Rifle.
Shorter barrels (including the Cooey) are best with faster powders. I would use IMR-3031 or Alliant RL-7 in one of these.
Bullets are available everywhere. I would try a 140 flatbase just to be safe and for good shooting with an "iffy" barrel. Most of these were never shot much because ammo was so hard to get...... but most of them were rarely cleaned, either! Try the Remington 140 SP bulk bullet or the Hornady equivalent. Cheapest slugs you will find.... and my Carcanos like them.
Dies are available from several sources, including Lee (cheapest).
JP (on this forum) has Clips. The Clip drops out the bottom of the Magazine when you chamber the last round; piece of masking tape or electrical tape cross the bottom of the Mag will keep you from losing the Clips. A partly-loaded Clip can be ejected UPWARD when you have the Bolt open: rifle is CLEAR, instantly! Thing LOADS instantly: push in a Clip and slap the Bolt shut.
Last one of these I got needs only minor work and will be on the range this coming Summer. Paid $100 for it at an auction because it was complete with BOTH triggers.
Set-trigger on these is pretty good.
Barrel is Cooey and is quality but the rifling is NOT deep. Flatbase bullets set-up easier, which is why I recommend them for this rifle. They are also cheaper!
Hope this helps.