The little Fireball case is exceptionally efficient and would undoubtedly be the perfect foundation for the .17 bullet.
20 odd years ago I had an Anschutz Hornet rebarreled to .17 Ackley Hornet using a hand lapped German barrel. I shot many small helpless animals with it. It was wonderful squirrel medicine within a couple hundred yards, if the wind wasn't blowing. However, for coyotes, it was either spectacular or ghastly in it's performance. One in the throat and it was lights out. One in the ass and it was rodeo time. For ass shooting coyotes I would recommend a 340 Tyrannasaur.
Anyway, I usually felt undergunned when coyote hunting with the Hornet, so it eventually left the stable. Now I shoot a .221 Fireball.
Ingwe, If I had to choose a new build I would be looking hard at the .20 Vartarg.
