218 Bee and 22K Hornet are pretty much the same beast. I have had a little better accuracy with the 218 Bee over the standard 22 Hornet, but I have never owned a K-Hornet so I can not comment on them.

I am not following what you want. If you are getting pin holes with your 223 then what more do you want. The only thing better than pin holes is a hammer to the head when you catch them in a live trap.

The 17 is a great fur cartridge if you watch your bullet selection and velocity. Good luck with that. Tom.