I've killed a lot of shit with the 450BM with 395SubX and 500gr cast, 308win with LeHigh 174 and 300blk with the 194ME.
I have ordered a few 100s of Maker 338 REX 350gr but haven't decided on what chambering (338 ARC or 86 BLK) yet.
Subsonic is all about shot placement, tight consistent SD/ES...