I usually use 45 grain Sierra Varminters for my .223 Handi. Somehow, I ended up with a couple boxes of Sierra Varminters that have "Hornet" printed on the box. I understand that bullets for the Hornet are generally made with thinner jackets for better terminal performance at .22 Hornet velocities. How fast can I push these bullets before they start coming apart in flight? Basically, Im wondering if I can still use them in my .223, which runs around 3300 fps. I couldn't find any info about this on Sierra's website. My Hornady book says you can go up to 3500fps with their Hornet's, but I'm not going to assume they are the same as the Sierra Hornet's.