24" barrelI using H4350 with Lupa or Peterson brass, CCI 450 primers (2755 fps) for my accurate 100 / 400 yard shooting using 142 SMK's. For longer distances I use RL26 with same 142 gr. bullets but found this powder likes Fed 215 mag primers (2925 fps), Peterson (lrp) yields 25+ reloading's. Hornady or Starline yields more velocity as they can hold more powder however, primers start to loosen up much sooner than Peterson! I anneal after each firing as found it gives consistent bullet grip yielding to SUB MOA.
Last edited by kadrick; 12/29/19. Reason: spelling