I love my 6.5x55. FWIW, 6.5mm bullets are still fairly common around here. While the 7mm, 30cal, etc bullets are picked over (except for the very odd weights), the 6.5mm section was fairly well stocked. Primers and powder are tough, but if you already load rifle, you probably have that. I saw 6.5x55 factory ammo on the shelf, surrounded by empty slots where "normal" calibers would normally sit.
Chris