hi has anyone actually measured or slugged the bore diameter of the new ruger #1's? I think I have decided on the #1 and now was thinking either the 9.3x74r or the 450/400 3".

I just started reloading and no matter what one i pick i will NOT be buying any factory ammo. If the 450/400 is .411 there is a possibility of using lighter 41 mag bullets. The 9.3 has some lighter bullets but only go 46gr lighter than the factory ammo. I really want one of these calibers but also want to shoot some lighter rounds.

any guidance would be great>
thanks,
mike