I did shorten the barrel to an overall length of 22 inches. I am in the process of recrowning the barrel now.
The only issue I am seeing with the bolt at this time is it looks like someone filed off the trigger a bit to try and improve trigger pull. It seems to work ok but if you hold the rifle upright the bolt will pull out on it's own without pulling the trigger. I will likely replace the trigger for 6 bucks and see how it functions.
I also cycled a few rounds through it last night without firing just to see how the bolt felt.
I considered it to be completly normal. You could feel the bolt was up against a round. Took all the slop out of the bolt but at the same time the force to close the bolt was not excessive. I consider this to be a good sign.
I found this website to a forum with Mosin barrel grading. The pictures are halfway down the thread. I would consider this barrel to be like the second picture. I also see no signs of throat errosion.
For the lazy including me, this is what the fellow said.
Bore 1: corrosion rate 0 & (no wear, lands with sharp edges, intact crown)
Bore 2: corrosion rate 2 & (minor wear, lands with relatively sharp edges, intact crown)
Bore 3: corrosion rate 3 & (wear, slightly rounded lands, somewhat worn crown)
Bore 4: corrosion rate 3 & (severe wear, lands completely rounded, badly worn muzzle with almost no crown)
Bore 5: corrosion rate 4 & (notable wear, rounded lands, worn muzzle, distension in front of the front sight)
I may find the courage to fire this thing again thisweekend for the first time in 15 years.