I only use 17 Hornady Hornet in a CZ.
In the TC 17 K-H, I'm using the Ackley brass and RCBS 17 K-H dies.
The 17 H-H is shorter so would make a very short-necked case when fired in the A-H or K-H.
Bruce
I was thinking of going this route. 17 Ackley Hornet brass fire formed and then reloaded with K Hornet does. I’m assuming I have to have those custom made.