Anyone out there familiar with the 70's Remingon 5mm Remington Magnum. I have one and had'nt shot it for years due to the scarcity of ammo. Thanks to Centurion this is no longer a problem. I wonder how long they will produce it. My question is, Does the 5mm hold up to the new super rimfire cartridges of today. I wonder because as a youngster, I killed many varmits with mine at all ranges out 100 yards. I wonder what the limits would be beyond 100 yds with better optics.