Hello Beavis,
I see my friend YellowknifeDave told you I might be lurking here, I'll tell you what I know, don't know if it will be of help to you, or what you want to hear. First of all, I have no experience with the .17, nor do I want any. I personally, would choose the 22 Win. Magnum over the 17, but that is strictly my opinion & preference, I am sure most wouldn't agree with me. As an all around varmint rifle, the 223(as you mention in the predator forum), is a much better choice.
The 24's are quite accurate, as Dave told you. If they are not, it is generally because of a lawyer proof trigger in excess of 9 pounds(which a good gunsmith can take care of). The beauty of these guns is that even if the barrels are a sloppy fit to the receiver, they still are generally quite accurate, because the scope mounts to the barrel, not the receiver, and this is true in both the rimfire and centerfire models.
I am not a fan of the newer 24's, they are entirely to heavy, hate the crossbolt safety(which is a perfect solution to a non existent problem), and I don't like composite stocks. I own 23 Savage 24's, and they are all PRE 1989, stocked in wood, and all the shotgun barrels (except one) are 20 gauge. The shotgun barrel is designed for close range running predators, and I feel a load of high brass 4's in 20 gauge is sufficient(and besides, in my state, can't use larger than #4 shot). Aside from that, the 20 gauge combo is a joy to carry compared to the 12.
The fact that the shotgun barrel doesn't shoot to the same point of impact as the rifle barrel on a Savage 24 is pretty normal, most tend to shoot a shotgun slug 8 inches below the point of impact of the rifle barrel, if you find one that shoots to the same point of impact, you should smile. Since the odds are against that, you simply need to do something about it. Since this is a Savage 24, and not a $3,000 dollar drilling, you don't get a jackscrew adjustment to adjust the point of impact of one barrel to the other. The answer for me, has been see thru scope rings. Yes your cheek is a little off the stock(I use the side of my jawbone when using the scope), but again, the gun IS a compromise, and the recoil of the smaller rounds is not bad, it gets hairier if you shoot one in 30-30. I use the scope for the rifle barrel, and the iron sights for the shotgun barrel.
Overall, the guns are pretty accurate, and although I have no experience with the 17, unless the 17 in an inaccurate round, it should be fine in a 24, if thats the cartridge you want. You need to remember, this is NOT a tackdriving specialty varmint rig, it is a COMBO gun, you could sort of say in does nothing excellent, but everything well. Just my personal thoughts and opinions, hope it helps you.
Sincerely,
Garry