Looks like a Czech VZ22 or VZ24 action with a newer commercial barrel and altered bolt handle. Typically well made Mauser M98 variants. While the bedding may look messy it might be perfectly functional. Have a gunsmith check the headspace or shoot a couple of rounds of inexpensive commercial ammo and check the case web for stretching. If OK shoot it and worry about the bedding later.
338-06 brass maybe fire formed from 30-06 brass with filler and a few grains of fast burning powder. I've fire formed cases by firing 30-06 factory loads in the 338-06 but that might not be safe in your rifle.
I would have grabbed that rifle too!
you can neck up shot 30/06 brass into 338/06, without having to fire form anything..
I've been doing that for a decade or two with my Model 70, that was necked up to that caliber from a 270 rebore...
