igotit
AH veteran
I have a 9x57 on a GEW built in an Express rifle configuration. I too shoot the 250 gr RN cast from an Ideal 358318 sized to 358. Cases are Remington necked up and don't have to turn the outside of the neck. I didn't chrono these loads as I have to load to the sights. To get proper fit, I necked up with my 9.3 then sized back down to 9 mm to make the shoulder need to fire form as the shoulder on my 9x57 is almost round instead of tapered. Shoots very good groups at 100 yards. Hoping to shoot a deer this year with it. Can't remember the load weight, but I'm using H335! Good luck with that rifle, I,love shooting cast boolits too.