My brother bought a 22k hornet and he wanted some opinions
You can. This is a target I shot a couple of years ago when I was forming K-Hornet cases. There are 100 shots. It is a 6 inch circle.
The ammunition was a mix of different bullets and a few different powders. The group size was about 4 inches at 100 yd with the majority grouping around 2 inches. He'll have fun making cases and hopefully the rifle will do its job.
My 22 K Hornet is an inexpensive Handi rifle that started life as a 22 Hornet.