of War & Profit
A character can acquire any type of common craftsmanship gear, weapon or armor in personal amounts from the ship’s supplies (where such could reasonably be stored) or visits to ports (where the appropriate technology exists) without the need for a profit check as long as that item is not rare, very rare, extremely rare, near unique, or unique. If a Good or Best craftsmanship is desired, then a profit check still needs to be made.
Given the Bellum Praeda is equipped with a Munitorium, common craftsmanship rare weapons, ammo, armor, and weapon upgrades can be acquired for personal use by the retinue of the Rogue Trader. Though disposable items will be limited in supply and usage based on how easily the Munitorium can be restocked.
Note that the time to find the item still applies if the item is sought outside of the ship’s supplies in a populated area; reference page 111 in the Rogue Trader’s core rules.