Checked my brass, it appears my 300 Savage ain't close to the 250-3000. A 22-250 would be my choice if I didn't have brass. Back in the day I loaded a 22-250 Norma case with Bullseye and no bullet, just a wax plug and fired it. It was just about perfect and just ran it through my 250 Savage die. A quick glance appears that the Creedmoor brass would work.
