1st post here, nice forum.
So I am wanting to build up a 300 BLK bolt gun on a 110 action. As a preface, this is to be a suppressor only fun gun for range use and to work up decent loads for my AR's in this caliber. I'm not using it to hunt or have any tactical operator fantasies about being the warlord on my block when the world ends, just a fun range toy. Next, I've built a few AK's and AR's and am comfortable checking headspace and have a firm understanding of the various issues of basic firearm assembly. The barrel swap and headspacing looks easy and straightforward, but I do have a few other questions. Hopefully these aren't stupid questions, if they are I apologize in advance.

What I have so far:
Savage 110FP .223 Tactical, looks like it had less than 100 rounds through it, bought used for $450 at a local shop. This is a bull barrel with a blind magazine that I think is a staggered feed.
ER Shaw barrel small shank, standard contour Gun Shack Group Buy barrel (waiting)
Wheeler Barrel vise
Wheeler nut wrench (backordered)
Pacific Go and No-Go gauges ordered

My questions:
Will I need a new stock to accommodate the thinner barrel?
Could a new stock and detachable magazine system be used?
Would this stock work ? http://www.midwayusa.com/product/623...tic-olive-drab
Will I need a new barrel nut and recoil nut for a new barrel?
Are there any other tools, parts or things I am missing?

Any tips, tricks and advise is welcome. Thanks you!

Here is the rifle as it sits. I already fitted it with a bipod and Leupold VX-3 3.5-10x40 Tactical.