I am new to paper patching, but learning lots thanks to this forum. I have been reloading for around seven years, and want to try to push some PP cast boolits to around 2,600 FPS in 300WM with a 24 inch barrel. 1:10 rifling. This could become a longer range "friendly" competition load.
Here is my plan:
Cast some Lee 90307, should drop around 224 grain. See design here: https://leeprecision.com/cgi-data/instruct/90307.pdf
Size down to .301 with no lube
Paper Patch and size to .310, lightly lubed with 50/50 beeswax and vasoline before sizing.
Final load will be working up to no more than 77 gr of H1000 with Federal Mag Primers. Seat to .002 below the rifling, not sure on OAL.
Here are my concerns:
This boolit is a bevel base. I have not found a lot of information on PPing bevel based boolits, but I have found a couple articles where people have done this. I suppose this is conceptually possible, but any additional information on this would be good.
Is this going to be sufficient for 1:10 rifling?
Where can I get a .301 (ish) sizing die? I do not see that Lyman has them. Do you think .301 is too small to size it to?
Can I size down this much? I think the tumble lube design will help, but might need to size down twice in progressions.
Any thoughts, advice, etc. appreciated.