I am trying to find a 357 Magnum load that runs the 358429 (~168 grains) at 1100 FPS out of a 4" revolver. Crimped in the groove, where it should be.
I would like to be able to do this ~30K PSI and with the fastest and cleanest powder available that also approaches 100% case fill.
I have been using 2400 and Blue Dot. Both seem wanting to me. 2400 works great but is dirty. Larger charges actually make it cleaner. It seems to like to be run hot. It's also slower than it needs to be. Blue Dot has pretty large deviation in velocity (probably due to lots of empty case space). Unique is a bit too fast and goes over my pressure target at that velocity. Tightgroup doesn't work for the same reason.
I was thinking about Vitavouri N105. It is bulkier and would probably fill that case better. I believe N105 is single base and therefore should be cleaner burning. The issue I am having is that Vitavouri does CIP pressure testing and I am convinced it runs as hot as old 357 mag data (45K CUP). Sometimes the starting loads for Vitavouri powders are greater than the max loads found in other manuals that cap at 35K PSI (like Hornady). This is with v110. I have not found any data for N105 that isn't provided by Vitavouri.
If Quickload has N105 I would really appreciate somebody plugging it in. Or if another powder is found that is potentially better I am all ears.