I've had excellent brass life in my Hornet. This may, in part, be attributable to my use of a bushing type neck die. At any rate, case growth is about 0.001"per cycle. I wholly agree with MADISON, HOT loads may have an adverse effect on case life.
To my way of thinking, The 17 Remington and the 22 Hornet are perhaps, at least in some sections of the U.S., not best suited for the same type of shooting.
If you would sometimes like to "hunt" varmints, rather than "snipe" at them, the Hornet can be a lot of fun to use. It is, however, IMHO an under "200 yard" rifle, due to its relatively high trajectory, unless you work with it extensively. It is a very nice tool for (safety first) hunting in close to populated areas as the report is minimal.
I'd say that the 17 Remington has been given worse press regarding its range (the usual complaint is wind drift) than it deserves- at least if you live in an area where realtively calm days are fairly frequent. It is quite shootable to 300 yards, and sometimes beyond in good conditions.
Bob