I’m running 44.5 RL15 in Hornady match brass with 57.6 gr H2O, which is 2g more than LAPUA brass in same gun. 45 is at pressure 45.5 def blows pockets in my brass. Hornady softer, so could run harder brass harder. Shoots lights out, and is close to USGI loads which use RL15 (& other powders, eg...