I went .5gr a time. That Lapua brass will handle it for sure. In fact I would assume the Lapua brass will MASK pressure a bit more than comfortable. I went .5 over book with H1000 and 1.5 over with RL33 and saw zero pressure signs in brass or primers. That brass just makes me think that pressure wont show until its WAY high. I am guessing most Lapua data is LIGHT. The RL33 data is 2gr lighter than 338RUM. Since the Lapua and Edge are generally regarded as equal with the RUM under them I find this hard to believe. Therefore I went to the 338RUM load, actually .3 shy of the RUM. With the brass I will probably bump over the RUM load later as it looked fine at 99gr.