Savage ### (110 / 111)= long action
Savage XX (10) = short action.
a stock for a xx action will not accept an action from a ###
Shank: Small shank = standard calibres The only large shank actions are the WSM's, RUM's
Swapping calibres: To easy, but you need the proper bolt face (preferably with extractor and ejector installed (swapping them between bolt faces will bring on turrets syndrome), and a headspace go / no go gauge...and of course..the barrell
It is recommended that you get the right barrel wrench, too. It is tooled to fit the nut exactly and prevents slipping, and allows you to snug the nut up properly.
There's a little more to it that this - not much though. When I was swapping around my barrells on my 110 (.223 to 22.250), I also had to take into account the mag well, as the initial 223 chambering did not appreciate being stuffed with 22.250 rounds, so I had to convert to a single-shot follower. It was my gopher gun so I didn't care. Most standard long calibres pretty much share the same mag well.
I take no credit for this stuff below, I just cut / paste from one of many sites:
Here's some basic information on the various Savage Model number designations:
12/112 or 10/110 - Varmint/Target series...only drilled and tapped for scope mounts, no open sights, 24" or 26" barrel, blued or stainless depending on specific variation
11/111 - Hunter series...open sights & drilled and tapped for scope mounts, 22" or 24" barrel, blued only
110/111###P3 - Package series...no sights, comes with 3-9x32 scope mounted, 22" or 24" barrel, blued only, wood stock/leather sling installed or synthetic stock/nylon sling installed
16/116 - Weather Warrior series...no sights, only drilled and tapped for scope mounts, 22", 24" or 26" barrel, stainless steel only
There are also some oddballs like the 10FM Sierra, 10FCM Scout, 114U Ultra, 114CE Classic European and the 116SE Safari Express but this should give you a basic idea how Savage classifies their rifles. Hope this helps!
AK -Adjustable Muzzle Brake
B -Laminate Stock
C -Clip (Detachable Box Mag.)
F -Synthetic Stock
G -Hardwood Stock
L -Left Hand
LE -Law Enforcement
ML -Muzzleloader
NS -No Sights
P -Police
SE -Safari Express
SS -Stainless Steel
U -Ultra High Lustre
V -Long Range (Heavy Barrel)
XP -Package Gun
Y -Youth
Example - Model 111FLC
F = Synthetic Stock
L = Left Hand
C = Clip
