Ok to be honest I had no idea until I bought a 10 hornet barrel for my Contender, fired the first shot and pulled out a Khornet case. Like quicks pics show a hornet is kind of like a 30-30 case while a khornet is more like a modern high power case.
I did get a chrony this past November and it has opened my eye's, some good, some not sot good. One of my biggest surprises was that the Hornady manual listed 13.6 grains of lil'gun with a 40 grain bullet will give you 2,400 fps out of a 10" barrel shot out of a Hornet contender. I admit I have had to try it a few times, check loads, try again but my contender with a 10" Khornet barrel is averaging 2,735fps with 13 grains of lil'gun. Now I was told that the KHornet burned better and I knew how accurate it was but I was shocked at the increase in velocity.