Look at the reloading manuals, Sierra and Hodgdon's. There is a huge descrepency between them. For the 175 SMK, Sierra suggests starting at 36.3gr with a max of 41.7; while the Hodgdon starts at 42gr maxing at 45C. Whats the deal here, I have heard Sierra is conservative, but wow. I also noticed that approximately 43.4gr fills up a case just below the neck, so what gives here.