mathman, to answer your question, it's a tight fit! I was wrong in my statement, it's 50.5 gr. of H380 under a 165 gr. BT. I haven't loaded that load for about 6 years since I sold the 788. I loaded some up last night, previously I wasn't aware of how much I was compressing the powder, but it was blatantly obvious to me last night. We learn constantly, right.
I'll give them a run, but I've also picked up some Varget and RL15 to try out in the new rifle.