tldr
subsonic blackout varients, higher caliber 8.6mm blackout, 300 blackout class changes
i think that with the addition of 300 blackout as a caliber that another interesting addition to such rounds would be adding subsonic varieties, this could be added with giving them worse ballistics and or penetration/expansion but at the benifits of a lower spook radius due to the lack of supersonic bang as well as possibly lowering the amount of hunting pressure given per kill
another idea I had was the addition of 8.6mm blackout to the roster of calibers in the game due to the recent addition 300 blackout with the 8.6 blackout covering higher classes like 6-9 or 5-8 and coming with a subsonic caliber as well
finally, I would think it would be a good change to alter the classes of 300 blackout to be a 2-6 caliber to add another option over 243 (which can feel very boring being the beginners gun with 1 varient) and I feel this can add to the viability of 300 blackout as it's quite overshadowed by the better versatility of the 243 being able to hunt fox or the better statistics of a 4-8 class gun given how weak 300 blackout is for class 6 animals
