I'm finally close to working up .308 Win subsonic loads for my AI, FAL and POF rifles to use with a pair of AAC suppressors. I have a bunch of Trailboss powder that I'd bought for CAS .45 Colt loads but I lost intetest in that and sold the USFA Rodeos that had the 14.5ksi limitation. I have a number of other .45 Colt revolvers but they can handle more robust H110 loads. Fortunately I kept the Trailboss powder and it seems that it's an excellent choice for subsonic .308 Win. Anyone here using Trailoss for subsonic loads and if so what bullet are you using?