PL M2 Calibers in buggy and truggy if the track is soft and had a fluffy top/gets rutted. M3 if there is any base to the track surface.
JConcepts Crosshairs in truggy ROCK if there is *any* kind of hard sub-base; but otherwise lack forward bite in loose topsoil type tracks.
JC Blue compound will work pretty much all the time.
JC Crowbars and Crossbows (or combo thereof) would also prob. work well in Buggy. From what you said folks are running; this would be my first combo to try.