I could rock a Cooper...I grew up within walking distance of the shop where they're built, but have never owned one. The K Hornet is kinda intriguing though.
Just fer [bleep] n giggles, one more.......
and using shiny brass also.
You ought to look for a used model 38 in the K-Hornet. Cooper does chamber that round.
The 17 Ackley hornet, 20 Hornet, 17 Bee 17 Hebee, 20 Killer Bee and my favorite the 20 Vartarg, plus many more are all "factory" chamberings at Cooper.
Best,
GWB