I have some 125gr Hornady SST J-words I'd like to try in 308 Winchester for a varmint/lower recoil hunting load for my son. Hornady lists max of 47.8gr H4895 and Hodgdon lists a max of 49gr. I am using LC brass and thought I would start at 47gr but the powder is halfway up the neck! At 43gr the powder is not quite up to the neck, so do you think this is a good starting load? And is the LC brass volume that much smaller?