So I finally went down the rabbit hole and decided to make some 7.62x45. I successfully made a dummy round from 220 swift. The shoulder is a tad off but should fire form. My question is load data. I'm planning on using standard 123fmj to start. From what I have found people are starting at higher end of 7.62x39 data. From my books the only listed powder I currently have is 4895 and it's listed at 27-29gr. Thinking of starting at 28gr and seeing if it's enough to cycle. Any problem with what I'm doing here? Should I look for a better powder option?