I'm only in my second year as a .17 HMR shooter, but have a brute of a scope to try on my CZ 452, it's a Mueller 8-32x44
http://www.whitefalls.ca/Descriptions/8-32x44mm%20SF.html
Huge~probably, too much scope, I'd say so...but my last .17 HMR had a Bushnell Banner 24x scope and while I liked that much power, I didn't care for the scope itself. This one has side Focus parallax adjustment, plain/fine reticle, more magnification than I need, but like up to 24x for groundhogs at 100+ yards. I also (for better or for worse) feel the temptation to see how far I can accurately shoot my new .17HMR, so we'll see how all of that works out. For practical purposes, I don't think you really "need" more than 12x-16x to realize a .17 HMR's potential, but to each his own. I do know this~I'm not keen on the real econo-varmint bushnells and this Mueller seems to be excellent quality for the price. Admittedly, I'd have chosen a smaller one in 18X if they offered it with the same features/reticle.