A few years ago I had a custom rifle made in .35 Whelan Improved, one of several Improved versions. Within a few years a factory version of rifle and and ammo were available. I wonder if anyone knows whether I can use .35 Whelan ammo in a .35 W Imp chamber. Like everyone else I fireformed 30-06 brass to create my original .35 Whelan ammo so I thought it should be safe. Any thoughts?