When you say the largest warships, are we talking something akin to the Retribution? Also, the Republic and Empire never managed to capture any of it during the Great War? No one but the Collective has any of the anti-matter techs? I’m just assuming that some of their carriers had to have been brought down in the war seeing as we saw a hollowed-out Republic carrier shell earlier in the series. Either the bugs were very dedicated to protecting the anti-matter tech. Or the stuff tends to blow up because there’s anti-matter in it. Any analytical method is known (and a few made up on the spot).
Good gods the amount of lore you pump out in comments turns me on far too much. I know plenty of it is made up on the spot and a lot of it might never come into play later, but just the amount sitting there that you shove into this universe is why I check for new chapters of this story every day. They don’t seem to use “bombs” of it though. They project anti-particle beams. Either they have difficulty making huge volumes of it at once or the containment and handling equipment is too bulky to make an effective bomb.