356 WIN velocities is about where I'd like to end up after breaking in the barrel and sighting in the scope
OK. That's easy. Look up a recipe for the max load of your bullet weight for 350 RM, then look up the max load for 356 WIN. Write down their velocities as a ratio
the 356 WIN will be less than the 350 RM. Let's just say it's something like: 2450/2700 or roughly 90% of the faster load. Given that, I'd start my load at a 10% reduction off MAX for that bullet in a 350 RM and that will give you a load that comes out roughly like a hot 356 WIN. With H4895 is will be a safe load (still well above 60%) and it'll probably be reasonably accurate. You can then adjust up or down to suit your desires using the chronograph to test your velocities.
I did pretty much this with my 308 WIN that shoots like a 300 Savage, and my 35 Whelen that I wanted to shoot like a 358 WIN. It's not exact, but it gets you in the ballpark.
