There is a whole long thread on the 300 PRC in the ELR section.
The 300 PRC, 30-375R, will be a cataloged item with SAMMI in the next two weeks. I don't know how long it will take them to add it to their website. Dave Manson has the specs and can make anyone a reamer.
www.snipershide.com
A lot to read, though, so here are my thoughts and observations:
- Your issue is going to be getting powder. I've found RL26 to be the best for the 300 PRC. It is next to impossible to find right now - actually, forget that, it's hard to find ANY TIME. It takes patience, persistence, and a lot of luck. Absent that, H1000 works well too, and I played a bit with Retumbo and it works decently well. Otherwise, similar speed powders as you can find them. I've not been able to get RL33 to work. People are reporting some luck with N565, and I think N568 would be interesting to try - I don't have a need as I've got 30+ lbs of RL26 on the shelf.
- Many people use Federal 215Ms for primers. I've actually found BR2s to be slightly more consistent. 215Ms are also difficult to find. Fortunately for me, BR2s are less so, and I've got a nice stash stocked up - those 215Ms I've been able to find are reserved for my 375.
- On the bullets, I'm not a fan of the Hornady polymer tipped products in this realm. I've been using Berger 230 hybrids and love them. Talk about impossible to find, though. Fortunately, they relatively recently came out with their 220 hybrids, which have a BC very close to the 230s. I have 1750 on the shelf waiting for me to shoot out my current barrel and drop on my new Bartlein gain twist. You can find 220s in stock. 245s also are interesting.
- Good job on getting the Lapua brass. Best out there for this caliber
- Are you going to buy a new Savage or rebarrel an existing?