If he's planning to do any night hunting, then there are restrictions and this is a great option to work within them. I have one of the FA F17 uppers, on an Aero Precision lower and I love it. Yes, I use it mainly for varmints, but I've taken coyotes and bobcat with the 17WSM, as have many other folks who shoot this cartridge, including one guy in MN who used his 17WSM mainly for night hunting predators.
With that being said, if he does not plan to hunt and just wants a rifle to plink with, then perhaps the .223 is a better fit.
Here is our original review of the full F17-L rifle from last year:
Franklin Armory F17-L – Rifle Review & Range ReportHere is a short review and hunt report, with video, I did with the rifle last year as well (warning - graphic content):
Franklin Armory F17-L – Review and Hunt ReportHere is my current build, with the Aero Precision lower:
A few minutes after I shot a few Rock Chucks at 175 yards:
My set-up on the ground squirrel fields in NE California:
Also, you can now find 17WSM ammo for around $13.00 a box of #50, so the price and availability make it attractive for someone who doesn't want to deal with reloading. For us here in California, it also means no bullet button, which is nice.
Let me know what his plans are with it and I'll give you my thoughts, until then I'm only guessing!
Eric