Just curious as to what everyone is using to load their Rigby's with? I have VV N560 and have enough to do what I need to with them, but don't know if I may be able to get anymore for future loads. I was also looking at H4831SC for the part of it being an extreme powder and won't be affected too much by the heat or cold. Since the case capacity using these powders is ranging around the 100 + gr category, I was also looking at using magnum primers (either Federal 215s or CCI 250s). Anyone have anything different than this or any experience? Thank you.