I'm not too sure how to word this but here goes.
Lets compare the 22 Hornet and the 223 Remington shooting cast boolits only. The 223 will handle weights up to 70 grains if the twist is fast enough. The Hornet will handle up to 55 grains, so lets hold the weight to 55 gr. The hornet according to my Lyman 4th editon cast bullet manual using the proper load will do a little over 1800 fps with the 55 grainer. The 223 with the 55 will do a little over 2300 fps. The shooting will be at 50 yards or so for small game only. I know both are capable of a 100 plus with those loads. Here's my delima I have a 223 14" TC. I have dies and lots of brass. Is it worth getting into a Hornet, I would have to start from scratch to get into a Hornet. Is there any real difference one over the other giving the parameters I gave.