I just picked up a 223 wssm barrel from another member here & was wondering if anyone else was using this caliber. What powder do y'all prefer? Maybe I should be asking what powder does the barrel / cartridge prefer?

I'm assuming that since it's a magnum & since it's a fat case with a small neck (like my mother-in-law) & since I like to use the "minimum 80% case fill / slowest propellant available" rule, I thought I'd start with some IMR4350 & 55gr Noslers. Also, that's what I had alot of....

What powder are any of y'all using for this one? I'm just looking for a good start point.

Thanks-

Frank in Fla