I'm still in R&D mode at the moment. Looking for some 45/70 pulls to try out in the 350gn neighborhood. Will be using magnum primers for sure. I will let you know asap once I'm able to get a few different batches loaded.
I’ve been loading this since around 2011. Loaded everything from 300-500gn. Load data is limited since it’s not a sanctioned round. Starline bulk brass is cheapest, but you may have figured that out. I’ve been getting bullets off the Nosler Shooter Pro Shop, mostly 300gn ballistic tip or combined technology round nose. Hornady dangerous game bullets work for the 500gn stuff. Like everything start light and work up. I’ve over pressured casings and flattened the rims so they won’t fit the bolt face a second time, that was with a listed load too. PM me if you want my loads. It’s a fun accurate round.