What BB weight do you run, and what made you settle on it?

I run .28 only recently got myself my first ARG it recommends .25 but the .28 have been doing it right

Depends what I'm running. Aeg's generally .28, mws runs .32, sten runs .36 as was over hopping the .3, dmr either .4 or .45

I run Cqb .25s Outdoors .32s rifle .4s mk23 .45 sniper